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.
Which TWO of the following are primary purposes of using the GrayKey tool in iOS forensics?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "primary"
Why it matters: Asks for the main purpose or function, not a secondary benefit. Eliminate answers that describe side-effects or partial functions.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Extract the full file system from a locked iOS device
Option C is correct because GrayKey is a specialized hardware/software tool designed to perform a full file system extraction from locked iOS devices, including those with passcodes. It exploits vulnerabilities in the iOS Secure Enclave or bootrom to bypass security mechanisms and retrieve a bit-for-bit copy of the device's storage, which is critical for forensic acquisition.
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.
✗
Perform static analysis of iOS malware
Why it's wrong here
GrayKey is a forensic acquisition tool, not a malware analysis tool.
✗
Decrypt iOS application binaries for analysis
Why it's wrong here
Decrypting binaries requires additional steps; GrayKey primarily focuses on extraction.
✓
Extract the full file system from a locked iOS device
Why this is correct
After bypass, GrayKey can perform a full file system extraction.
Clue confirmation
The clue word "primary" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✓
Bypass the iOS passcode to gain access to the device
Why this is correct
GrayKey is designed to brute-force or bypass passcodes on iOS devices.
Clue confirmation
The clue word "primary" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Create an encrypted iTunes backup
Why it's wrong here
iTunes itself creates backups; GrayKey is not used for that.
Common exam traps
Common exam trap: answer the scenario, not the keyword
EC-Council often tests the distinction between 'bypassing the passcode' (option D) and 'extracting the file system' (option C) as separate but complementary purposes, leading candidates to incorrectly select only one when both are primary functions of GrayKey.
Detailed technical explanation
How to think about this question
GrayKey leverages checkm8 or similar bootrom exploits to gain low-level access to the iOS device's NAND flash, allowing extraction of the entire file system including keychain data, SQLite databases, and system files. In practice, this enables forensic examiners to recover deleted messages, call logs, and app data even from devices with unknown passcodes, as the tool can brute-force or bypass the passcode via the Secure Enclave's limited attempts.
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: Extract the full file system from a locked iOS device — Option C is correct because GrayKey is a specialized hardware/software tool designed to perform a full file system extraction from locked iOS devices, including those with passcodes. It exploits vulnerabilities in the iOS Secure Enclave or bootrom to bypass security mechanisms and retrieve a bit-for-bit copy of the device's storage, which is critical for forensic acquisition.
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.
Are there clue words in this question I should notice?
Yes — watch for: "primary". Asks for the main purpose or function, not a secondary benefit. Eliminate answers that describe side-effects or partial functions.
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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