CS0-003 Incident Response and Management Practice Question
This CS0-003 practice question tests your understanding of incident response and management. Compare every option against the stated constraints before choosing — the best answer satisfies all requirements, not just the most obvious one. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
During a ransomware attack, several workstations have been encrypted. The incident response team has identified the ransomware variant and determined it does not have a known decryption tool. Which containment strategy is MOST appropriate?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Disconnect the affected workstations from the network, but leave them powered on.
Disconnecting the affected workstations from the network (but leaving them powered on) preserves volatile evidence in memory (e.g., encryption keys, process artifacts) and prevents the ransomware from spreading to other hosts via SMB, RDP, or other lateral movement protocols. Powering off would destroy this critical forensic data, while leaving them connected risks further encryption of network shares.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✓
Disconnect the affected workstations from the network, but leave them powered on.
Why this is correct
Disconnecting from network stops lateral movement while preserving evidence.
Related concept
Read the scenario before looking for a memorised answer.
✗
Power off all affected workstations immediately.
Why it's wrong here
Powering off destroys volatile data that may be needed for forensic analysis.
✗
Run a full antivirus scan on the affected workstations.
Why it's wrong here
Antivirus may not remove the ransomware and could modify files needed for investigation.
✗
Restore all affected workstations from backups immediately.
Why it's wrong here
Restoring before containment could re-infect if the vulnerability is not addressed.
Common exam traps
Common exam trap: answer the scenario, not the keyword
CompTIA often tests the misconception that immediate power-off is best for safety, but the trap here is that preserving volatile memory for forensic analysis is prioritized over a simple shutdown, especially when no decryption tool exists and evidence may lead to key recovery.
Detailed technical explanation
How to think about this question
In ransomware incidents, memory forensics (via tools like Volatility) can capture encryption keys stored in RAM if the system is not powered off, as many ransomware variants (e.g., LockBit, Ryuk) use symmetric encryption keys that persist in memory during the encryption process. Disconnecting the network cable (or disabling the NIC) at the switch level stops C2 beaconing and lateral movement without triggering anti-forensic mechanisms that some ransomware employs upon shutdown. This aligns with the SANS 'PICERL' methodology, where containment precedes eradication and recovery.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A developer is choosing between AES-256 (symmetric) and RSA-2048 (asymmetric) for encrypting a large file that will be sent to a partner. Symmetric encryption is fast but requires key exchange; asymmetric is slower but solves the key distribution problem. A hybrid approach — encrypt the file with AES, encrypt the AES key with RSA — is standard. Questions like this test whether you understand when each approach applies.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this CS0-003 question in full detail.
Incident Response and Management — This question tests Incident Response and Management — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Disconnect the affected workstations from the network, but leave them powered on. — Disconnecting the affected workstations from the network (but leaving them powered on) preserves volatile evidence in memory (e.g., encryption keys, process artifacts) and prevents the ransomware from spreading to other hosts via SMB, RDP, or other lateral movement protocols. Powering off would destroy this critical forensic data, while leaving them connected risks further encryption of network shares.
What should I do if I get this CS0-003 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
This CS0-003 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 CS0-003 exam.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.