CHFI Mobile and Malware Forensics Practice Question
This CHFI practice question tests your understanding of mobile and malware forensics. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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 mobile forensics investigation, an analyst needs to acquire data from an iPhone that cannot be bypassed via passcode. The device is locked, and the analyst has the passcode. Which acquisition method provides the MOST comprehensive data extraction?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Physical acquisition
Physical acquisition is the most comprehensive method because it creates a bit-for-bit copy of the entire flash storage, including the operating system, kernel, unallocated space, and deleted file remnants. Even with the passcode known, a locked iPhone restricts file system access via USB, but physical acquisition (often using advanced techniques like JTAG or chip-off) bypasses these restrictions to extract the raw NAND data, yielding the fullest forensic picture.
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.
✓
Physical acquisition
Why this is correct
Physical acquisition creates a full image of the device's storage, retrieving all data including deleted files.
Related concept
Read the scenario before looking for a memorised answer.
✗
Manual acquisition
Why it's wrong here
Manual acquisition involves manually browsing the device, which is slow and incomplete.
✗
Logical acquisition
Why it's wrong here
Logical acquisition only extracts files visible through the operating system, missing deleted data.
✗
File system acquisition
Why it's wrong here
File system acquisition retrieves allocated files but not unallocated space.
Common exam traps
Common exam trap: answer the scenario, not the keyword
EC-Council often tests the misconception that 'logical acquisition' or 'file system acquisition' is sufficient for locked devices, but the trap is that even with the passcode, a locked iPhone restricts file system access via USB, making physical acquisition the only method that can bypass these restrictions and capture the full storage image.
Detailed technical explanation
How to think about this question
Physical acquisition on an iPhone often involves exploiting the device's bootrom (e.g., checkm8 vulnerability) or using hardware methods like JTAG or ISP (In-System Programming) to read the NAND flash directly. This method can recover data from the iOS keychain, SQLite databases with deleted records, and even encrypted partitions if the passcode is known, as the decryption keys are derived from the passcode and stored in the Secure Enclave. In real-world cases, physical acquisition is critical for recovering evidence from iPhones with passcodes but disabled USB access (e.g., after a force restart or when 'USB Restricted Mode' is active).
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: Physical acquisition — Physical acquisition is the most comprehensive method because it creates a bit-for-bit copy of the entire flash storage, including the operating system, kernel, unallocated space, and deleted file remnants. Even with the passcode known, a locked iPhone restricts file system access via USB, but physical acquisition (often using advanced techniques like JTAG or chip-off) bypasses these restrictions to extract the raw NAND data, yielding the fullest forensic picture.
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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