The answer is volatile memory and active network/process state must be captured first. This is correct because fileless malware resides exclusively in RAM, leaving no persistent artifacts on disk, so capturing memory preserves the running code, active processes, and live network connections that would vanish upon reboot or shutdown. On the CompTIA CySA+ CS0-003 exam, this tests your understanding of the order of volatility in digital forensics, where the most volatile data—like RAM and current network state—is collected before less volatile data such as disk images. A common trap is to prioritize disk imaging first, but fileless malware’s memory-only nature makes that a critical mistake. Remember the mnemonic “RAM before ROM” to recall that volatile evidence must be captured before any power-down or reboot occurs.
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.
During a post-compromise review, a server suspected of running fileless malware is still powered on. Which evidence should be captured first if it is safe to do so? During detection and analysis, which decision is most defensible? which action should be prioritized before closure?
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.
Fileless malware may reside in memory; volatile evidence disappears when the system is powered off. In detection and analysis, responders need action that reduces risk while preserving the investigation record.
B
Marketing screenshots
Why wrong: Screenshots do not preserve memory-resident artefacts.
C
Archived monthly reports
Why wrong: Reports may be useful later but are not volatile host evidence.
D
The office seating plan
Why wrong: Seating plans do not capture malware state.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Volatile memory and active network/process state
In a post-compromise review of a server suspected of running fileless malware, volatile memory (RAM) and active network/process state must be captured first because fileless malware resides only in memory and leaves no persistent artifacts on disk. Capturing this evidence preserves the malware's code, running processes, network connections, and other transient data that would be lost on reboot or shutdown, enabling forensic analysis of the attack.
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.
✓
Volatile memory and active network/process state
Why this is correct
Fileless malware may reside in memory; volatile evidence disappears when the system is powered off. In detection and analysis, responders need action that reduces risk while preserving the investigation record.
Clue confirmation
The clue word "first" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Marketing screenshots
Why it's wrong here
Screenshots do not preserve memory-resident artefacts.
✗
Archived monthly reports
Why it's wrong here
Reports may be useful later but are not volatile host evidence.
✗
The office seating plan
Why it's wrong here
Seating plans do not capture malware state.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Cisco often tests the principle of order of volatility (OOV), where candidates mistakenly prioritize disk-based evidence over volatile memory, forgetting that fileless malware exists only in RAM and is destroyed on power loss.
Detailed technical explanation
How to think about this question
Fileless malware often leverages living-off-the-land binaries (LOLBins) like PowerShell, WMI, or .NET assemblies injected into trusted processes, leaving no executable on disk. Capturing memory with tools like LiME or WinPmem allows analysts to extract process listings, loaded DLLs, network sockets, and registry hives from RAM, while tools like netstat or tcpdump capture active connections that may reveal C2 communication. In a real-world scenario, failing to capture memory first could allow the malware to self-destruct or encrypt its payload upon shutdown, losing critical indicators of compromise.
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: Volatile memory and active network/process state — In a post-compromise review of a server suspected of running fileless malware, volatile memory (RAM) and active network/process state must be captured first because fileless malware resides only in memory and leaves no persistent artifacts on disk. Capturing this evidence preserves the malware's code, running processes, network connections, and other transient data that would be lost on reboot or shutdown, enabling forensic analysis of the attack.
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: "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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