This CISM practice question tests your understanding of incident management. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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.
You are the incident response manager for a mid-sized e-commerce company. At 2:00 PM, the security operations center receives an alert from the intrusion detection system indicating a potential SQL injection attack against the customer database server. The server hosts a critical database containing customer PII and payment card data. The alert shows multiple suspicious queries from an internal IP address 192.168.10.50, which belongs to the development team's jump box. The development team uses this jump box to access production servers for maintenance. The jump box is managed by the IT operations team. The CEO is currently in a meeting with investors and cannot be disturbed. The CISO is on leave. The company has a written incident response plan that designates the IT director as the incident response coordinator in the absence of the CISO. The IT director has limited security knowledge. The database administrator (DBA) reports that the database is experiencing high CPU usage and that some customer records appear to have been modified. You need to take immediate action. What should you 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
✓
Isolate the jump box from the network immediately
Isolating the jump box (192.168.10.50) is the correct first action because it immediately stops the active SQL injection attack at its source, preventing further data exfiltration or modification. The suspicious queries originate from this internal IP, and containment is the priority in incident response to halt the threat before investigation or recovery. This aligns with the NIST SP 800-61 containment strategy, which prioritizes stopping the attack vector before preserving evidence or notifying stakeholders.
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.
✗
Shut down the database server to prevent further data loss
Why it's wrong here
Causes business impact and may corrupt evidence.
✗
Contact the development team lead to ask about the activity
Why it's wrong here
This could alert a potential insider and delay containment.
✓
Isolate the jump box from the network immediately
Why this is correct
Stops the attack and preserves evidence.
Clue confirmation
The clue word "first" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Escalate the incident to the IT director and request guidance
Why it's wrong here
IT director has limited knowledge; time is critical.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates confuse 'escalation' with 'first action'—they think notifying the IT director is required per the plan, but CISM emphasizes that incident response managers must take immediate containment steps before escalation when an active attack is confirmed.
Detailed technical explanation
How to think about this question
SQL injection attacks against a database server often use crafted queries to extract or modify data via the application layer; isolating the jump box at the network level (e.g., via ACL or port shutdown) cuts the TCP connection mid-stream, stopping the injection payloads without losing the ability to later analyze network captures (pcap) for forensic evidence. In real-world scenarios, attackers frequently pivot through jump boxes to reach sensitive databases, so isolating the jump box also prevents lateral movement to other production systems. The jump box's IP (192.168.10.50) is internal, indicating a compromised credential or insider threat, making network isolation the fastest containment method.
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 small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
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: Isolate the jump box from the network immediately — Isolating the jump box (192.168.10.50) is the correct first action because it immediately stops the active SQL injection attack at its source, preventing further data exfiltration or modification. The suspicious queries originate from this internal IP, and containment is the priority in incident response to halt the threat before investigation or recovery. This aligns with the NIST SP 800-61 containment strategy, which prioritizes stopping the attack vector before preserving evidence or notifying stakeholders.
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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Question Discussion
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