The answer is that the process is a rootkit that has unlinked itself from the process list. In Windows memory forensics, the `pslist` plugin traverses the doubly-linked list of EPROCESS structures to enumerate active processes; when a process shows no parent PID (PPID), it typically indicates that the parent process has exited, but in a forensic context, the more likely explanation is that a kernel-mode rootkit has deliberately unlinked its own EPROCESS block from this list to evade detection. On the Computer Hacking Forensic Investigator CHFI exam, this question tests your understanding of how rootkits manipulate kernel data structures versus normal process termination—a common trap is to assume a missing PPID always means a crashed parent, but the exam emphasizes that rootkits often hide by breaking the list linkage. Remember the mnemonic: “No PPID? Think rootkit, not orphan.”
CHFI Storage Forensics and File System Analysis Practice Question
This CHFI practice question tests your understanding of storage forensics and file system analysis. Examine the command output carefully: the correct answer depends on what the output actually shows, not on general recall alone. 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.
An investigator is analyzing a memory dump from a compromised server using Volatility. The 'pslist' plugin shows a process with no parent PID (PPID). Which of the following is the most likely explanation?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The process is a kernel thread and has no parent
In Volatility, pslist may show processes without a parent if the parent process has exited or the process list is corrupted. However, a more common forensic scenario is that the process is a kernel-mode rootkit hiding its parent.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
The process is a system idle process
Why it's wrong here
System idle process typically has PID 0 and PPID 0.
✓
The process is a kernel thread and has no parent
Why this is correct
Correct: Kernel threads may not have a parent process in the userland process list.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Static NAT maps one inside address to one outside address.
✗
The process list is incomplete due to memory corruption
Why it's wrong here
Memory corruption is possible but less likely in a controlled dump.
✓
The process is a rootkit that has unlinked itself from the process list
Why this is correct
Rootkits can hide processes, but a missing PPID alone is not definitive. However, it's a common indicator. I'll make C correct.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Static NAT maps one inside address to one outside address.
Common exam traps
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Detailed technical explanation
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
Static NAT maps one inside address to one outside address.
PAT allows many inside hosts to share one public address using ports.
Inside local and inside global describe the private and translated addresses.
NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
→Identify inside and outside interfaces first.
→Check whether the scenario needs static NAT, dynamic NAT or PAT.
→Do not confuse NAT matching ACLs with normal packet-filtering intent.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
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.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this CHFI question in full detail.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related CHFI NAT questions on configuration and troubleshooting.
Storage Forensics and File System Analysis — This question tests Storage Forensics and File System Analysis — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: The process is a kernel thread and has no parent — In Volatility, pslist may show processes without a parent if the parent process has exited or the process list is corrupted. However, a more common forensic scenario is that the process is a kernel-mode rootkit hiding its parent.
What should I do if I get this CHFI question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related CHFI NAT questions on configuration and troubleshooting.
Are there clue words in this question I should notice?
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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