This CISM practice question tests your understanding of incident 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.
During an incident investigation, the forensic analyst discovers that a malware sample communicates with an external IP address. The organization's incident response plan requires a decision on whether to block the IP at the firewall. What should the incident response team do FIRST?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "first"
Why it matters: Order matters here. You are being tested on which action comes before the others — not which action is generally useful.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Check threat intelligence feeds to confirm maliciousness.
Option D is correct because the incident response team must first validate the maliciousness of the IP address using threat intelligence feeds before taking any irreversible action. Blocking an IP without confirmation could disrupt legitimate business operations or tip off an attacker, and the CISM framework emphasizes evidence-based decision-making during incident response.
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.
✗
Monitor the connection further without taking action.
Why it's wrong here
Monitoring without action may allow further damage.
✗
Block the IP address immediately to prevent data exfiltration.
Why it's wrong here
Blocking without verification could cause disruption or alert the attacker.
✗
Notify law enforcement about the IP address.
Why it's wrong here
Law enforcement notification should come after internal verification and containment.
✓
Check threat intelligence feeds to confirm maliciousness.
Why this is correct
Verification through threat intelligence ensures the action is justified.
Clue confirmation
The clue word "first" 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
The trap here is that candidates often choose 'Block the IP immediately' (Option B) because they equate speed with effective containment, but CISM stresses that containment actions must be risk-informed and validated to avoid collateral damage and legal liability.
Detailed technical explanation
How to think about this question
Threat intelligence feeds (e.g., AlienVault OTX, VirusTotal, MISP) aggregate reputation scores, historical C2 associations, and passive DNS data. A single IP may host multiple domains, some benign; checking these feeds helps avoid false positives. In a real-world scenario, a malware sample might beacon to a cloud IP that also hosts a legitimate SaaS tenant, and blocking it could disrupt critical business workflows.
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 practitioner preparing for the CISM exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Incident Management — This question tests Incident Management — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Check threat intelligence feeds to confirm maliciousness. — Option D is correct because the incident response team must first validate the maliciousness of the IP address using threat intelligence feeds before taking any irreversible action. Blocking an IP without confirmation could disrupt legitimate business operations or tip off an attacker, and the CISM framework emphasizes evidence-based decision-making during incident response.
What should I do if I get this CISM 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: "first". Order matters here. You are being tested on which action comes before the others — not which action is generally useful.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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This CISM practice question is part of Courseiva's free ISACA 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 CISM exam.
Question Discussion
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