Question 160
During a planned service expansion at Vantage Travel, engineers say that they resolved this finding: A threat feed delivers repeated stale IP indicators long after infrastructure ownership changes. Which result provides the STRONGEST acceptance evidence?
Explanation
Correct Answer
The expired indicator is withdrawn across consumers without losing the historical investigation. This is the decisive evidence for the original problem: A threat feed delivers repeated stale IP indicators long after infrastructure ownership changes. It verifies that the intended corrective control—Enforce indicator TTL and automated expiration with safe review of exceptions—works in the relevant environment; a completed change ticket alone would not prove the outcome at Vantage Travel.
Incorrect Answers
Authorized recipients ingest structured intelligence without receiving protected case data. This would be relevant evidence for a different failure: Security analytics generates detections but incident responders cannot share actionable findings with partner teams, usually addressed by Package sanitized indicators and relevant context into a controlled STIX/TAXII sharing workflow. It does not demonstrate that the current problem at Vantage Travel was resolved. The specific required evidence is: The expired indicator is withdrawn across consumers without losing the historical investigation.
Low-trust indicators are held for review while verified indicators retain source attribution. This would be relevant evidence for a different failure: External threat intelligence repeatedly causes false positives because ingestion ignores indicator provenance, usually addressed by Use trust scoring and analyst validation before promoting indicators to blocking actions. It does not demonstrate that the current problem at Vantage Travel was resolved. The specific required evidence is: The expired indicator is withdrawn across consumers without losing the historical investigation.
Firewalls and DNS security consume the same current indicator and log their enforcement. This would be relevant evidence for a different failure: A SOC identifies a confirmed malicious domain but each security product maintains a different manual blocklist, usually addressed by Publish a validated indicator through a managed intelligence feed or shared exchange mechanism. It does not demonstrate that the current problem at Vantage Travel was resolved. The specific required evidence is: The expired indicator is withdrawn across consumers without losing the historical investigation.