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.
An Android phone is seized, and the forensic examiner needs to acquire the device in a forensically sound manner. The phone is running Android 12 and has USB debugging enabled. Which acquisition method provides the most complete data without physically modifying the device?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Physical acquisition via ADB with appropriate exploit
Option B is correct because physical acquisition via ADB with an appropriate exploit allows the examiner to obtain a complete bit-for-bit copy of the device's flash memory, including deleted data and unallocated space, without physically modifying the device. Since Android 12 has USB debugging enabled, ADB can be used to push an exploit that bypasses security restrictions to perform a physical dump, which is the most comprehensive method available for this scenario.
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.
✗
File system acquisition via Cellebrite UFED
Why it's wrong here
Cellebrite UFED can perform file system extraction, but physical acquisition is generally more complete.
✓
Physical acquisition via ADB with appropriate exploit
Why this is correct
Physical acquisition via ADB (e.g., using dd or a custom recovery) can obtain a full physical image, providing the most comprehensive data.
Related concept
Read the scenario before looking for a memorised answer.
✗
Logical acquisition through ADB backup
Why it's wrong here
ADB backup only retrieves app data and system settings, not the entire file system.
✗
Manual extraction using screen captures
Why it's wrong here
Manual extraction is the least complete and not forensically sound for data integrity.
Common exam traps
Common exam trap: answer the scenario, not the keyword
EC-Council often tests the misconception that file system acquisition via Cellebrite UFED is the most complete method, but candidates must remember that physical acquisition captures raw flash memory including deleted data, whereas file system acquisition only retrieves active files.
Detailed technical explanation
How to think about this question
Physical acquisition via ADB exploits leverages Android's debug bridge to execute a custom recovery or bootloader exploit (e.g., using 'adb reboot bootloader' followed by fastboot commands) to dump raw partitions like userdata, cache, and system. In Android 12, even with USB debugging enabled, modern security features like verified boot and dm-verity may require an exploit that disables these protections to allow a full physical read without triggering device modifications. A real-world scenario involves using tools like 'adb shell' with a rooted exploit (e.g., Magisk or custom recovery) to perform 'dd' commands on block devices, ensuring the acquisition is bit-for-bit and forensically sound.
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 via ADB with appropriate exploit — Option B is correct because physical acquisition via ADB with an appropriate exploit allows the examiner to obtain a complete bit-for-bit copy of the device's flash memory, including deleted data and unallocated space, without physically modifying the device. Since Android 12 has USB debugging enabled, ADB can be used to push an exploit that bypasses security restrictions to perform a physical dump, which is the most comprehensive method available for this scenario.
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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