CAS-004 Security Operations Practice Question
During a security incident, a SOC analyst identifies a process with a suspicious hash on several endpoints. The analyst wants to determine if this hash is known to be malicious by querying internal and external threat intelligence sources. Which standard should the analyst use to structure the threat intelligence data for automated sharing?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
STIX
STIX (Structured Threat Information Expression) is a language for describing threat intelligence, often used in conjunction with TAXII for sharing. It structures data like indicators, observables, and campaigns.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
TAXII
Why it's wrong here
TAXII is a transport protocol for sharing threat intelligence, not a data format.
- ✓
STIX
Why this is correct
STIX is the standard structured language for describing threat intelligence.
- ✗
OpenIOC
Why it's wrong here
OpenIOC is a format for indicators of compromise, but it is not as comprehensive as STIX for structured threat intelligence.
- ✗
CybOX
Why it's wrong here
CybOX is a language for specifying cyber observables, but STIX is the primary standard for threat intelligence.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This CAS-005 practice question is part of Courseiva's free CompTIA certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the CAS-005 exam.