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CompTIA CS0-003 Practice Test 67

Question 660

An analyst detects a malicious scheduled task configured to run on every user sign-in. What is the MOST appropriate analyst action based on the evidence?

  1. Separate tactic stages and associated techniques in the ATT&CK mapping.
  2. Select ATT&CK credential-access techniques and their relevant data sources.
  3. Evaluate actual behavior-based detections against the corresponding techniques.
  4. Map the behavior to the relevant ATT&CK persistence technique rather than a specific actor.

Explanation

Correct Answer

D:

ATT&CK describes adversary behaviors without proving group attribution. Map scheduled-task persistence to ATT&CK.

Incorrect Answers

A:

A single intrusion can cross several tactics and require multiple evidence sources. That is relevant to mitre att&ck technique mapping, not to map scheduled-task persistence to ATT&CK.

B:

Technique mapping directs hunts toward process and credential-access evidence. It would use ATT&CK to plan credential dumping detections, but it would not map scheduled-task persistence to ATT&CK.

C:

One hash signature does not cover a technique class broadly. It could help assess ATT&CK coverage beyond file signatures, but it would not map scheduled-task persistence to ATT&CK.

Question 661

A penetration tester claims OWASP test coverage from running only a vulnerability scanner. Which next step is MOST defensible for the security team?

  1. Compare actual executed test cases with the guide's relevant manual and technical objectives.
  2. Choose a more relevant platform assessment method for kernel configuration.
  3. Report observed requests, responses, impact and mitigation under the test method.
  4. Use relevant OWASP Web Security Testing Guide categories with authorized test scope.

Explanation

Correct Answer

A:

Automated scanning does not automatically establish full web testing coverage. Evaluate incomplete OWASP testing coverage.

Incorrect Answers

B:

Web application testing guidance does not replace OS hardening assessment. It could help limit OWASP guide to appropriate attack surface, but it would not evaluate incomplete OWASP testing coverage.

C:

Repeatable findings allow secure remediation without claiming unaudited exploit success. That is relevant to owasp testing guide application, not to evaluate incomplete OWASP testing coverage.

D:

OWASP guidance organizes web application security testing methods. It would apply OWASP testing guide to session assessment, but it would not evaluate incomplete OWASP testing coverage.

Question 662

A vulnerability tester uses the Diamond Model instead of a web attack testing methodology. Which action BEST aligns with sound security operations?

  1. Assess other attacker objectives such as data theft or persistence.
  2. Use an appropriate application testing guide for actual control validation.
  3. Use event relationships such as Diamond Model vertices to organize correlations.
  4. Keep the behavior mapping but require separate attribution evidence.

Explanation

Correct Answer

B:

Intrusion-analysis models do not prescribe complete hands-on web test procedures. Choose appropriate framework for web test.

Incorrect Answers

A:

Intrusions can meet objectives without following a fixed linear impact pattern. It could help avoid forcing linear attack kill chain, but it would not choose appropriate framework for web test.

C:

A relational model complements simple indicator lists. It would select Diamond Model for campaign linkage, but it would not choose appropriate framework for web test.

D:

ATT&CK mappings describe behaviors, not actor identity by themselves. It could help avoid inferring actor solely from ATT&CK, but it would not choose appropriate framework for web test.

Question 663

A detection program claims full ATT&CK coverage because it identifies one malicious executable hash. Which response BEST addresses the security problem described?

  1. Select ATT&CK credential-access techniques and their relevant data sources.
  2. Map the behavior to the relevant ATT&CK persistence technique rather than a specific actor.
  3. Evaluate actual behavior-based detections against the corresponding techniques.
  4. Separate tactic stages and associated techniques in the ATT&CK mapping.

Explanation

Correct Answer

C:

One hash signature does not cover a technique class broadly. Assess ATT&CK coverage beyond file signatures.

Incorrect Answers

A:

Technique mapping directs hunts toward process and credential-access evidence. That is relevant to mitre att&ck technique mapping, not to assess ATT&CK coverage beyond file signatures.

B:

ATT&CK describes adversary behaviors without proving group attribution. It would map scheduled-task persistence to ATT&CK, but it would not assess ATT&CK coverage beyond file signatures.

D:

A single intrusion can cross several tactics and require multiple evidence sources. That is relevant to mitre att&ck technique mapping, not to assess ATT&CK coverage beyond file signatures.

Question 664

A malicious campaign registers domains and prepares lookalike infrastructure before sending emails. Which investigative or response action BEST fits the evidence?

  1. Record malicious objective execution as actions on objectives and preserve supporting evidence.
  2. Record delivery without assuming exploitation or installation occurred.
  3. Map the observed traffic to command-and-control activity.
  4. Classify infrastructure preparation as an earlier kill-chain activity.

Explanation

Correct Answer

D:

Attack preparation precedes delivery and successful exploitation. Identify pre-delivery adversary preparation.

Incorrect Answers

A:

Final-stage impact differs from staging and access phases. It would identify attack-objective execution, but it would not identify pre-delivery adversary preparation.

B:

The kill-chain phases should reflect evidence, not presumed completion. It could help distinguish payload delivery from exploitation, but it would not identify pre-delivery adversary preparation.

C:

Recurring remote instructions follow initial compromise. That is relevant to cyber kill chain interpretation, not to identify pre-delivery adversary preparation.

Question 665

A malware report lists a phishing lure, initial execution and subsequent remote session. What is the MOST appropriate analyst action based on the evidence?

  1. Separate tactic stages and associated techniques in the ATT&CK mapping.
  2. Select ATT&CK credential-access techniques and their relevant data sources.
  3. Evaluate actual behavior-based detections against the corresponding techniques.
  4. Map the behavior to the relevant ATT&CK persistence technique rather than a specific actor.

Explanation

Correct Answer

A:

A single intrusion can cross several tactics and require multiple evidence sources. Distinguish ATT&CK tactics within one chain.

Incorrect Answers

B:

Technique mapping directs hunts toward process and credential-access evidence. That is relevant to mitre att&ck technique mapping, not to distinguish ATT&CK tactics within one chain.

C:

One hash signature does not cover a technique class broadly. It would assess ATT&CK coverage beyond file signatures, but it would not distinguish ATT&CK tactics within one chain.

D:

ATT&CK describes adversary behaviors without proving group attribution. It could help map scheduled-task persistence to ATT&CK, but it would not distinguish ATT&CK tactics within one chain.

Question 666

A test report claims risk removal from one compliant control checklist without adversarial validation. Which next step is MOST defensible for the security team?

  1. Define OSSTMM-aligned testing channels and obtain authorization for each area.
  2. Distinguish control configuration review from actual security-test results.
  3. Stop the action and obtain written authorization before proceeding.
  4. Repeat consistent authorized tests against both baselines and record changed reachability.

Explanation

Correct Answer

B:

Security testing measures behavior and exposure, not only policy existence. Distinguish security assessment from compliance checklist.

Incorrect Answers

A:

Broad methodology scope should be explicit and approved. That is relevant to osstmm and test methodology selection, not to distinguish security assessment from compliance checklist.

C:

Assessment methodologies never override legal scope boundaries. It could help enforce OSSTMM engagement authorization, but it would not distinguish security assessment from compliance checklist.

D:

Comparable test methods allow defensible measurement of control effectiveness. That is relevant to osstmm and test methodology selection, not to distinguish security assessment from compliance checklist.

Question 667

A detection engineer asks which behaviors ransomware uses after credential theft. Which action BEST aligns with sound security operations?

  1. Explain observed progression using the cyber kill chain with evidence boundaries.
  2. Follow authorized OWASP web testing method categories.
  3. Map relevant ATT&CK techniques and data sources for detection improvements.
  4. Use the Diamond Model and annotate confidence for each event linkage.

Explanation

Correct Answer

C:

ATT&CK supports technical behavior- and telemetry-oriented planning. Select ATT&CK for ransomware detection design.

Incorrect Answers

A:

Stage-oriented communication clarifies preventive and detective opportunities. It would use kill chain for executive detection timeline, but it would not select ATT&CK for ransomware detection design.

B:

Application testing guidance targets specific control failure mechanisms. It could help select OWASP guide for web assurance, but it would not select ATT&CK for ransomware detection design.

D:

Relational campaign analysis benefits from the four model vertices. It would use Diamond Model for adversary relationship graph, but it would not select ATT&CK for ransomware detection design.

Question 668

A ransomware payload encrypts shared data after remote operator commands. Which response BEST addresses the security problem described?

  1. Record delivery without assuming exploitation or installation occurred.
  2. Classify infrastructure preparation as an earlier kill-chain activity.
  3. Map the observed traffic to command-and-control activity.
  4. Record malicious objective execution as actions on objectives and preserve supporting evidence.

Explanation

Correct Answer

D:

Final-stage impact differs from staging and access phases. Identify attack-objective execution.

Incorrect Answers

A:

The kill-chain phases should reflect evidence, not presumed completion. It could help distinguish payload delivery from exploitation, but it would not identify attack-objective execution.

B:

Attack preparation precedes delivery and successful exploitation. That is relevant to cyber kill chain interpretation, not to identify attack-objective execution.

C:

Recurring remote instructions follow initial compromise. It would classify command-and-control kill-chain stage, but it would not identify attack-objective execution.

Question 669

A remote access tool starts only after a suspicious payload is installed. Which investigative or response action BEST fits the evidence?

  1. Link installation evidence to subsequent command-and-control without assuming data theft.
  2. Require payload preparation or campaign evidence before claiming weaponization.
  3. Track the blocked delivery as a prevention event, not a host compromise.
  4. Distinguish initial access from internal discovery in the behavioral timeline.

Explanation

Correct Answer

A:

Tool execution and remote control are separate phases from impact. Separate installation from C2.

Incorrect Answers

B:

Vulnerability existence alone is not an attacker action. It would avoid inferring weaponization from CVE, but it would not separate installation from C2.

C:

Accurate stage interpretation prevents false incident counts. It could help measure blocked phishing delivery distinctly, but it would not separate installation from C2.

D:

Separate technique classification helps locate missing detections. That is relevant to intrusion sequencing and attack paths, not to separate installation from C2.

Question 670

A threat report provides a full kill-chain diagram even though only delivery and C2 were logged. What is the MOST appropriate analyst action based on the evidence?

  1. Mark the escalation hypothesis unconfirmed and request additional host evidence.
  2. Remove unsupported stages or label them as hypotheses, not observed facts.
  3. Require reproducible control-specific testing records before acceptance.
  4. Seek stronger identifiers before treating the events as related.

Explanation

Correct Answer

B:

Attractive framework diagrams cannot replace proof of each stage. Avoid fabricating kill-chain phases.

Incorrect Answers

A:

Framework mappings should carry evidence limitations. It would express uncertainty in privilege escalation mapping, but it would not avoid fabricating kill-chain phases.

C:

Category labels are not proof of actual application security testing. That is relevant to modeling uncertainty in incident reports, not to avoid fabricating kill-chain phases.

D:

Common generic accounts are weak linking evidence. It would challenge weak event correlation in Diamond Model, but it would not avoid fabricating kill-chain phases.


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