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CAS-005 Premium File: 482 Questions & Answers

Last Update: Oct 24, 2026

CAS-005 Training Course: 180 Video Lectures

CAS-005 PDF Study Guide: 903 Pages

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CompTIA CAS-005 Practice Test 10

Question 90

A release removes approval steps after a staffing change. Which control or decision MOST directly resolves the stated gap?

  1. Model how a malicious actor could abuse recovery and identity proofing.
  2. Reassess workflow abuse and separation-of-duty threats.
  3. Model separate actor capabilities and constrain role design.
  4. Draw explicit trust boundaries and test cross-tenant access paths.

Explanation

Correct Answer

B:

Organizational change can invalidate earlier controls. The controlling fact is: A release removes approval steps after a staffing change.

Incorrect Answers

A:

Model how a malicious actor could abuse recovery and identity proofing would not address the need for reassess workflow abuse and separation-of-duty threats.

C:

Different subjects create different threat opportunities. The scenario does not present the alternate condition: a service grants the same permissions to batch automation and interactive staff. The proper immediate action is to reassess workflow abuse and separation-of-duty threats.

D:

Draw explicit trust boundaries and test cross-tenant access paths would not address the need for reassess workflow abuse and separation-of-duty threats.

Question 91

A threat model lists 40 theoretical attacks but provides no decision ranking. What is the appropriate security response for this scenario?

  1. Build a path graph showing the privilege escalation route and place a control at that edge.
  2. Distinguish detective coverage from necessary preventative safeguards.
  3. Rank feasible paths by prerequisites, exposure and business impact.
  4. Model the shared failure node before finalizing resilience controls.

Explanation

Correct Answer

C:

Control investment should follow credible, consequential paths. The controlling fact is: A threat model lists 40 theoretical attacks but provides no decision ranking.

Incorrect Answers

A:

Building a path graph showing the privilege escalation route and placing a control at that edge would not address the need for rank feasible paths by prerequisites, exposure and business impact.

B:

The current facts call for this action: rank feasible paths by prerequisites, exposure and business impact.

D:

Model the shared failure node would not address the need for rank feasible paths by prerequisites, exposure and business impact.

Question 92

Threat hunters focus only on initial access and ignore persistence and exfiltration. What should the enterprise security architect or analyst do NEXT?

  1. Map observed behavior to supported ATT&CK techniques only.
  2. Use the Diamond Model to structure those linked observations.
  3. Use CAPEC patterns to enumerate relevant abuse cases.
  4. Use a lifecycle model to expose detection gaps at later stages.

Explanation

Correct Answer

D:

Lifecycle mapping identifies missing telemetry coverage. The controlling fact is: Threat hunters focus only on initial access and ignore persistence and exfiltration.

Incorrect Answers

A:

The reported condition calls for this action: Use a lifecycle model to expose detection gaps at later stages.

B:

The current facts call for this action: use a lifecycle model to expose detection gaps at later stages.

C:

Attack patterns organize recurring exploitation behaviors. The scenario does not present the alternate condition: a design team wants reusable examples of how attackers abuse password reset workflows. The proper immediate action is to use a lifecycle model to expose detection gaps at later stages.

Question 93

An employee launches a SaaS tenant outside procurement without audit logging. Which action is MOST defensible given these facts?

  1. Identify unsanctioned cloud services and assess sensitive data exposure.
  2. Enumerate inherited external assets and assign accountable owners.
  3. Inventory public digital disclosures and reduce unnecessary exposure.
  4. Map the data flow and review trust crossings and third-party controls.

Explanation

Correct Answer

A:

Shadow assets cannot be excluded from threat modeling. The controlling fact is: An employee launches a SaaS tenant outside procurement without audit logging.

Incorrect Answers

B:

The current facts call for this action: identify unsanctioned cloud services and assess sensitive data exposure.

C:

Information leakage can ease adversary reconnaissance. The scenario does not present the alternate condition: a website reveals sensitive internal service naming in public configuration files. The proper immediate action is to identify unsanctioned cloud services and assess sensitive data exposure.

D:

The reported condition calls for this action: Identify unsanctioned cloud services and assess sensitive data exposure.

Question 94

A research laboratory stores high-value design files and has supplier engineering access. Which action is the BEST response to the security requirement?

  1. Model integrity and operational impacts before choosing mitigations.
  2. Prioritize credible espionage paths across supplier trust connections.
  3. Model availability and integrity abuse proportionately to attacker capability.
  4. Prioritize account takeover and transaction misuse threat scenarios.

Explanation

Correct Answer

B:

Supply-chain access changes plausible attack likelihood. The controlling fact is: A research laboratory stores high-value design files and has supplier engineering access.

Incorrect Answers

A:

Model integrity and operational impacts would not prioritize credible espionage paths across supplier trust connections.

C:

Threat models should not assume every actor is nation-state grade. The scenario does not present the alternate condition: a public campaign website sees repeated low-skill vandalism attempts. The proper immediate action is to prioritize credible espionage paths across supplier trust connections.

D:

Prioritizing account takeover and transaction misuse threat scenarios would not prioritize credible espionage paths across supplier trust connections.

Question 95

A proposed compensating control monitors an attack path but does not prevent the irreversible loss. Which action is MOST defensible given these facts?

  1. Model the shared failure node before finalizing resilience controls.
  2. Rank feasible paths by prerequisites, exposure and business impact.
  3. Distinguish detective coverage from necessary preventative safeguards.
  4. Build a path graph showing the privilege escalation route and place a control at that edge.

Explanation

Correct Answer

C:

Detection alone may not satisfy the risk treatment goal. The controlling fact is: A proposed compensating control monitors an attack path but does not prevent the irreversible loss.

Incorrect Answers

A:

Model the shared failure node would not distinguish detective coverage from necessary preventative safeguards.

B:

The current facts call for this action: distinguish detective coverage from necessary preventative safeguards.

D:

Building a path graph showing the privilege escalation route and placing a control at that edge would not distinguish detective coverage from necessary preventative safeguards.

Question 96

A website reveals sensitive internal service naming in public configuration files. Which action is the BEST response to the security requirement?

  1. Enumerate inherited external assets and assign accountable owners.
  2. Map the data flow and review trust crossings and third-party controls.
  3. Identify unsanctioned cloud services and assess sensitive data exposure.
  4. Inventory public digital disclosures and reduce unnecessary exposure.

Explanation

Correct Answer

D:

Information leakage can ease adversary reconnaissance. The controlling fact is: A website reveals sensitive internal service naming in public configuration files.

Incorrect Answers

A:

The reported condition calls for this action: Inventory public digital disclosures and reduce unnecessary exposure.

B:

The current facts call for this action: inventory public digital disclosures and reduce unnecessary exposure.

C:

Shadow assets cannot be excluded from threat modeling. The scenario does not present the alternate condition: an employee launches a SaaS tenant outside procurement without audit logging. The proper immediate action is to inventory public digital disclosures and reduce unnecessary exposure.

Question 97

A public endpoint queues unbounded expensive reports for any visitor. Which control or decision MOST directly resolves the stated gap?

  1. Model denial-of-service abuse and bound resource admission.
  2. Model tampering and repudiation threats and add accountable integrity logs.
  3. Model information disclosure from the changed data flow.
  4. Model spoofing and elevation risks at the authorization boundary.

Explanation

Correct Answer

A:

Untrusted requests can exhaust shared resources. The controlling fact is: A public endpoint queues unbounded expensive reports for any visitor.

Incorrect Answers

B:

The current facts call for this action: model denial-of-service abuse and bound resource admission.

C:

Nonbusiness telemetry can cross confidentiality boundaries. The scenario does not present the alternate condition: a batch processor logs personal fields to a broad telemetry channel. The proper immediate action is to model denial-of-service abuse and bound resource admission.

D:

The reported condition calls for this action: Model denial-of-service abuse and bound resource admission.

Question 98

A service grants the same permissions to batch automation and interactive staff. What is the appropriate security response for this scenario?

  1. Model how a malicious actor could abuse recovery and identity proofing.
  2. Model separate actor capabilities and constrain role design.
  3. Draw explicit trust boundaries and test cross-tenant access paths.
  4. Reassess workflow abuse and separation-of-duty threats.

Explanation

Correct Answer

B:

Different subjects create different threat opportunities. The controlling fact is: A service grants the same permissions to batch automation and interactive staff.

Incorrect Answers

A:

Model how a malicious actor could abuse recovery and identity proofing would not address the need for model separate actor capabilities and constrain role design.

C:

Internal location is not proof of authorization. The scenario does not present the alternate condition: an authorization design assumes all internal callers are trusted. The proper immediate action is to model separate actor capabilities and constrain role design.

D:

Reassess workflow abuse and separation-of-duty threats would not address the need for model separate actor capabilities and constrain role design.

Question 99

A public campaign website sees repeated low-skill vandalism attempts. What should the enterprise security architect or analyst do NEXT?

  1. Prioritize credible espionage paths across supplier trust connections.
  2. Prioritize account takeover and transaction misuse threat scenarios.
  3. Model availability and integrity abuse proportionately to attacker capability.
  4. Model integrity and operational impacts before choosing mitigations.

Explanation

Correct Answer

C:

Threat models should not assume every actor is nation-state grade. The controlling fact is: A public campaign website sees repeated low-skill vandalism attempts.

Incorrect Answers

A:

Prioritizing credible espionage paths across supplier trust connections would not address the need for model availability and integrity abuse proportionately to attacker capability.

B:

The current facts call for this action: model availability and integrity abuse proportionately to attacker capability.

D:

Model integrity and operational impacts would not address the need for model availability and integrity abuse proportionately to attacker capability.

Question 100

Incident responders compare the infrastructure, capability, actor and victim relationships. Which action is MOST defensible given these facts?

  1. Map observed behavior to supported ATT&CK techniques only.
  2. Use a lifecycle model to expose detection gaps at later stages.
  3. Use CAPEC patterns to enumerate relevant abuse cases.
  4. Use the Diamond Model to structure those linked observations.

Explanation

Correct Answer

D:

The model organizes intrusion relationships, not a confidence-free actor attribution. The controlling fact is: Incident responders compare the infrastructure, capability, actor and victim relationships.

Incorrect Answers

A:

The reported condition calls for this action: Use the Diamond Model to structure those linked observations.

B:

The current facts call for this action: use the Diamond Model to structure those linked observations.

C:

Attack patterns organize recurring exploitation behaviors. The scenario does not present the alternate condition: a design team wants reusable examples of how attackers abuse password reset workflows. The proper immediate action is to use the Diamond Model to structure those linked observations.


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