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CCSP Practice Question: A company experiences a security breach in its…
A company experiences a security breach in its cloud environment, and the security team needs to preserve evidence for legal proceedings. Which of the following is the MOST important step to take first?
⚠ Common exam trap
ISC2 often tests the misconception that preserving evidence means immediately collecting logs or notifying stakeholders, when in fact the first step is to contain the incident to prevent evidence from being altered or destroyed by ongoing attacker activity.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Isolate the compromised systems from the network to prevent lateral movement.
The immediate priority in a cloud security incident is to contain the breach and prevent lateral movement, which preserves the integrity of the evidence by stopping further compromise. Isolating compromised systems (e.g., via network security groups or virtual network segmentation) ensures that volatile data, such as memory contents and active connections, is not altered by ongoing attacker activity. This step aligns with the NIST SP 800-61 incident response framework, which emphasizes containment before evidence collection.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Disable all logging to prevent the attacker from seeing detection efforts.
Why it's wrong here
Disabling logging erases the audit trail needed to reconstruct the intrusion, directly destroying the evidence the team must preserve. It is tempting as a way to hide detection activity from an attacker, but defenders rely on those same logs; isolation and snapshotting achieve containment without losing forensic data.
- ✓
Isolate the compromised systems from the network to prevent lateral movement.
Why this is correct
Isolating compromised systems halts active lateral movement, preserving volatile evidence such as memory and running processes that would otherwise be altered or destroyed. Containment must precede forensic acquisition, since ongoing attacker activity continually overwrites artefacts. This satisfies the stem's requirement to preserve evidence for legal proceedings by securing the environment first.
- ✗
Notify all affected customers of the breach.
Why it's wrong here
Customer notification is a legal and regulatory obligation, but it destroys no evidence and does not preserve volatile cloud artefacts such as memory, logs or snapshots, which decay first. It is tempting because breach disclosure is mandatory, yet it belongs after containment and forensic capture, not before them.
- ✗
Contact the legal department to obtain a warrant before any action.
Why it's wrong here
Contacting legal is prudent, but waiting for a warrant before isolating systems or capturing volatile data lets evidence expire and the attacker continue. It is tempting because legal guidance matters in proceedings, yet forensic preservation of memory, logs and snapshots must begin immediately to satisfy chain-of-custody requirements.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This CCSP practice question is part of Courseiva's free ISC2 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 CCSP exam.