Question 530
A security operations team receives this change request: A threat researcher adds a suspicious domain to a case but later needs to explain why an external intelligence vendor labeled it malicious. Which statement describes the decisive system dependency?
Explanation
Correct Answer
Indicator verdicts are contextual evidence whose source and age matter for defensible response. This behavior determines the engineering decision. The appropriate action is: Capture the indicator value, type, enrichment source, timestamp, and supporting detection in the incident record. Verify success by checking: An independent reviewer can trace the cited reputation back to the correct domain and time.
Incorrect Answers
The action “Intelligence about an indicator is not evidence that the environment encountered it; observation and reputation are separate facts” addresses a separate source case: A newly imported intelligence indicator is marked malicious but has no corresponding observed event in the environment, and an analyst claims an actual breach occurred. Its underlying reason is: Intelligence about an indicator is not evidence that the environment encountered it; observation and reputation are separate facts. This question instead describes a threat researcher adds a suspicious domain to a case but later needs to explain why an external intelligence vendor labeled it malicious. The original answer “Indicator verdicts are contextual evidence whose source and age matter for defensible response” targets that failure because indicator verdicts are contextual evidence whose source and age matter for defensible response.
The action “Comments and incident history maintain a traceable chronology instead of relying on one mutable title field” addresses a separate source case: A SOC wants to preserve analyst reasoning from triage through remediation, but operators overwrite the incident title at each step and lose decision history. Its underlying reason is: Comments and incident history maintain a traceable chronology instead of relying on one mutable title field. This question instead describes a threat researcher adds a suspicious domain to a case but later needs to explain why an external intelligence vendor labeled it malicious. The original answer “Indicator verdicts are contextual evidence whose source and age matter for defensible response” targets that failure because indicator verdicts are contextual evidence whose source and age matter for defensible response.
The action “Containment and completed investigation are different stages of response; action success alone does not prove case closure” addresses a separate source case: An incident owner closes a case immediately after quarantining a host, but the forensic analysis and recovery validation are still pending. Its underlying reason is: Containment and completed investigation are different stages of response; action success alone does not prove case closure. This question instead describes a threat researcher adds a suspicious domain to a case but later needs to explain why an external intelligence vendor labeled it malicious. The original answer “Indicator verdicts are contextual evidence whose source and age matter for defensible response” targets that failure because indicator verdicts are contextual evidence whose source and age matter for defensible response.