CS0-003 Incident Response and Management Practice Question
This CS0-003 practice question tests your understanding of incident response and management. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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.
While supporting a hybrid workforce, after containing a compromised host, analysis shows persistence through a scheduled task and a stolen service account. What is required before recovery? During containment, which decision is most defensible? which evidence should guide the decision?
Why wrong: Reconnection before eradication can allow reinfection.
B
Disable logging to improve performance
Why wrong: Logging is critical during recovery validation.
C
Close the incident after isolation
Why wrong: Isolation is containment, not full eradication or recovery.
D
Remove persistence, rotate affected credentials, and verify no related hosts remain compromised
Recovery should follow eradication of persistence and credential exposure. In containment, responders need action that reduces risk while preserving the investigation record.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Remove persistence, rotate affected credentials, and verify no related hosts remain compromised
Option D is correct because before recovery, you must remove the persistence mechanism (the scheduled task) to prevent re-infection, rotate the stolen service account credentials to close the attacker's access, and verify no other hosts are compromised via the same account. This aligns with the NIST SP 800-61 recovery phase, which requires eliminating all footholds and validating the scope of compromise before returning the host to production.
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.
✗
Reconnect the host because users need it
Why it's wrong here
Reconnection before eradication can allow reinfection.
✗
Disable logging to improve performance
Why it's wrong here
Logging is critical during recovery validation.
✗
Close the incident after isolation
Why it's wrong here
Isolation is containment, not full eradication or recovery.
✓
Remove persistence, rotate affected credentials, and verify no related hosts remain compromised
Why this is correct
Recovery should follow eradication of persistence and credential exposure. In containment, responders need action that reduces risk while preserving the investigation record.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Cisco often tests the misconception that isolation alone is sufficient for recovery, but the trap here is that persistence and credential theft require active removal and verification before the host can be safely reintegrated.
Detailed technical explanation
How to think about this question
Under the hood, scheduled tasks on Windows are stored in %SystemRoot%\System32\Tasks and can be enumerated via schtasks /query. A stolen service account often has domain-level privileges, so credential rotation must be performed on the domain controller (e.g., using Active Directory Users and Computers or PowerShell's Set-ADAccountPassword) and propagated to all systems where the account is cached. In a real-world scenario, failing to verify related hosts could allow lateral movement via pass-the-hash if the same account was used elsewhere.
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 SOC analyst notices unusual lateral movement in the network at 2 AM. The IR playbook dictates: identify and contain (isolate the affected machine), then eradicate (remove the malware), then recover (restore from backup), then document. Skipping containment before eradication risks the attacker regaining access. Questions like this test the sequence and rationale of incident response phases.
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: Remove persistence, rotate affected credentials, and verify no related hosts remain compromised — Option D is correct because before recovery, you must remove the persistence mechanism (the scheduled task) to prevent re-infection, rotate the stolen service account credentials to close the attacker's access, and verify no other hosts are compromised via the same account. This aligns with the NIST SP 800-61 recovery phase, which requires eliminating all footholds and validating the scope of compromise before returning the host to production.
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.