The answer is volatile memory and active network/process state, because fileless malware evidence capture order of volatility dictates that the most ephemeral data must be collected first. Fileless malware resides exclusively in RAM and running processes, leaving no persistent artifacts on disk, so capturing a memory dump (e.g., via `memdump` or `LiME`) alongside active network connections and process lists (e.g., `netstat`, `ps`, `lsof`) preserves the evidence that would vanish the instant the system is powered off or rebooted. On the CompTIA CySA+ CS0-003 exam, this principle tests your understanding of NIST SP 800-86 forensic procedures and the critical distinction between volatile and non-volatile data; a common trap is to prioritize disk imaging or log collection first, which would lose the very evidence the malware relies on. Remember the mnemonic “RAM before ROM” — if it disappears when the power goes, capture it first.
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, 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 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.
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 fileless malware incident, the malware resides in volatile memory (RAM) and active system processes, leaving no persistent artifacts on disk. Capturing volatile memory (e.g., via `memdump` or `LiME`) and active network/process state (e.g., `netstat`, `ps`, `lsof`) preserves the most ephemeral evidence before it is lost upon shutdown or power loss. This aligns with the NIST SP 800-86 forensic order of volatility, which mandates collecting volatile data first.
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 words "best", "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 order of volatility (OOV) principle, and the trap here is that candidates may mistakenly prioritize disk-based evidence (e.g., logs or reports) over volatile memory, not realizing that fileless malware leaves no disk footprint and that powering off the server would destroy the primary evidence source.
Detailed technical explanation
How to think about this question
Fileless malware often leverages living-off-the-land binaries (LoLBins) like PowerShell or WMI, executing code directly in memory without writing to disk. Tools like Volatility can analyze a memory dump to extract injected code, hidden processes, and network connections (e.g., via `connscan` or `malfind`). In a real-world scenario, failing to capture memory first could allow the malware to detect forensic activity and self-destruct, erasing all traces of the attack chain.
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 fileless malware incident, the malware resides in volatile memory (RAM) and active system processes, leaving no persistent artifacts on disk. Capturing volatile memory (e.g., via `memdump` or `LiME`) and active network/process state (e.g., `netstat`, `ps`, `lsof`) preserves the most ephemeral evidence before it is lost upon shutdown or power loss. This aligns with the NIST SP 800-86 forensic order of volatility, which mandates collecting volatile data first.
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", "first". 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.
About these practice questions
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These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. While supporting a hybrid workforce, 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 evidence should guide the decision?
hard
✓ A.Volatile memory and active network/process state
B.Marketing screenshots
C.Archived monthly reports
D.The office seating plan
Why A: 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. If the system is powered off, all evidence of the malware's execution (e.g., injected code, network connections, running processes) is lost forever. This follows the order of volatility (RFC 3227), which prioritizes capturing the most ephemeral data before any other forensic step.
Variation 2. 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?
easy
✓ A.Volatile memory and active network/process state
B.Marketing screenshots
C.Archived monthly reports
D.The office seating plan
Why A: 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. Any shutdown or reboot would destroy this evidence, making it impossible to analyze the malware's behavior, network connections, or injected processes. This follows the forensic order of volatility (RFC 3227), which mandates capturing the most volatile data first.
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Question Discussion
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