CHFI Mobile and Malware Forensics Practice Question
This CHFI practice question tests your understanding of mobile and malware forensics. 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.
A security analyst discovers a suspicious file on a Windows system with the hash 'd41d8cd98f00b204e9800998ecf8427e'. Which type of indicator of compromise (IoC) is this hash most commonly associated with?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
File hash indicator
The hash 'd41d8cd98f00b204e9800998ecf8427e' is the MD5 hash of an empty file (zero bytes). In malware forensics, a file hash is a classic file-based indicator of compromise (IoC) used to uniquely identify known malicious files. Option D is correct because this hash directly identifies a specific file, making it a file hash indicator.
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.
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Network indicator
Why it's wrong here
Network indicators include IPs, domains, or URLs, not file hashes.
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Behavioural indicator
Why it's wrong here
Behavioural indicators describe actions like persistence mechanisms or network connections, not static file hashes.
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Registry key indicator
Why it's wrong here
Registry keys are stored in Windows Registry, not represented by file hashes.
✓
File hash indicator
Why this is correct
File hashes (MD5, SHA1, SHA256) are used to uniquely identify known malicious files.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
EC-Council often tests candidates' ability to distinguish between IoC types by presenting a well-known hash value, leading some to mistakenly classify it as a network or behavioural indicator due to its unusual appearance.
Detailed technical explanation
How to think about this question
The MD5 hash d41d8cd98f00b204e9800998ecf8427e is the well-known hash of an empty string or empty file, often used as a placeholder or to test hash functions. In real-world forensics, attackers may use empty files as markers or to trigger specific behaviours, and this hash can appear in threat intelligence feeds as a known indicator. Understanding that file hashes are static IoCs helps analysts quickly correlate files across systems using tools like YARA or hash databases.
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 practitioner preparing for the CHFI exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this CHFI question in full detail.
Mobile and Malware Forensics — This question tests Mobile and Malware Forensics — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: File hash indicator — The hash 'd41d8cd98f00b204e9800998ecf8427e' is the MD5 hash of an empty file (zero bytes). In malware forensics, a file hash is a classic file-based indicator of compromise (IoC) used to uniquely identify known malicious files. Option D is correct because this hash directly identifies a specific file, making it a file hash indicator.
What should I do if I get this CHFI question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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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