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.
In a regulated payment environment, 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 action best reduces risk without losing evidence?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "best"
Why it matters: Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
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 after containing a compromised host, the recovery phase requires removing the persistence mechanism (the scheduled task), rotating the stolen service account credentials to prevent re-authentication, and verifying that no other hosts are compromised via lateral movement. This ensures the threat is fully eradicated before returning the host to production, which is critical in a regulated payment environment where PCI DSS or similar standards mandate thorough remediation.
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.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
CompTIA often tests the misconception that containment (isolation) alone is sufficient for recovery, but the exam emphasizes that eradication (removing persistence and rotating credentials) and validation (checking other hosts) are mandatory steps before declaring recovery complete.
Detailed technical explanation
How to think about this question
Scheduled tasks in Windows (schtasks) can be used to execute malicious payloads at system startup or intervals, often persisting via the Task Scheduler service. Stolen service accounts, if not rotated, allow the attacker to authenticate using cached credentials (e.g., Kerberos TGTs or NTLM hashes) even after the host is isolated. In a real-world scenario, an attacker might use a scheduled task to run a PowerShell script that re-establishes a C2 channel via DNS tunneling, and rotating the service account invalidates all existing Kerberos tickets, forcing re-authentication.
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 security team runs a vulnerability scan on a web application and discovers an unpatched SQL injection flaw. The team prioritises remediation by CVSS score — critical flaws are patched within 24 hours, high within 7 days. Questions like this test whether you understand vulnerability management processes, scanning tools, and remediation prioritisation.
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 after containing a compromised host, the recovery phase requires removing the persistence mechanism (the scheduled task), rotating the stolen service account credentials to prevent re-authentication, and verifying that no other hosts are compromised via lateral movement. This ensures the threat is fully eradicated before returning the host to production, which is critical in a regulated payment environment where PCI DSS or similar standards mandate thorough remediation.
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.
Are there clue words in this question I should notice?
Yes — watch for: "best". Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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