CAS-004 Security Operations Practice Question
An incident response team is handling a ransomware incident. The team has successfully contained the threat and is now in the eradication phase. Which THREE actions are appropriate for the eradication phase? (Select THREE.)
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
✓
Apply security patches to the vulnerability that allowed initial access
Eradication involves removing the threat completely: deleting malware, revoking compromised credentials, and patching vulnerabilities.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Restore systems from clean backups
Why it's wrong here
Restoration is part of recovery, not eradication.
- ✓
Apply security patches to the vulnerability that allowed initial access
Why this is correct
Patching prevents re-infection.
- ✓
Revoke and reset all compromised user and service accounts
Why this is correct
Revoking compromised accounts ensures no residual access.
- ✓
Delete all infected files and registry keys associated with the ransomware
Why this is correct
Removing artifacts is part of eradication.
- ✗
Conduct a lessons learned meeting
Why it's wrong here
Lessons learned is the final phase, not eradication.
Go deeper
Related to this question
About these practice questions
This CAS-005 question is part of Courseiva's 968-question bank — original exam-style content with full explanations and wrong-answer analysis, never real exam questions or exam dumps. Learn why practice questions differ from exam dumps →
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.