hardMultiple ChoiceObjective-mapped
CAS-004 Practice Question: During a ransomware incident, the organization…
During a ransomware incident, the organization discovers that all production backups have been encrypted by the attacker. What is the most effective recovery approach?
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
✓
Restore from offline immutable backups
Offline immutable backups are not accessible to the ransomware, ensuring a clean restore point. Option B is wrong because system restore points may also be encrypted. Option C is wrong because decryption tools often fail against modern ransomware. Option D is wrong because paying the ransom does not guarantee decryption and encourages further attacks.
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 from offline immutable backups
Why this is correct
Immutable backups cannot be modified by ransomware and are reliable recovery sources.
- ✗
Restore from system restore points
Why it's wrong here
Restore points are often stored on the same system and may be encrypted.
- ✗
Use a decryption tool from security vendors
Why it's wrong here
Decryption tools are rarely available for new ransomware variants.
- ✗
Pay the ransom to obtain the decryption key
Why it's wrong here
Paying ransom encourages attackers and may not result in data recovery.
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About these practice questions
Courseiva writes every CAS-005 question from scratch — 968 in total, each with an explanation and a wrong-answer breakdown. None are copied from real exams or 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.