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 of the following mobile forensics tools is specifically designed to extract data from iOS devices by exploiting the device's bootrom vulnerability (e.g., checkm8) to perform a physical extraction?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
GrayKey
GrayKey is correct because it is a mobile forensic tool specifically designed to exploit the checkm8 bootrom vulnerability (a permanent, unpatchable exploit affecting A5 to A11 chips) to perform a physical extraction of iOS devices. This allows bypassing the device's passcode and extracting the full file system, including encrypted data, without needing to jailbreak the device.
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.
✗
Oxygen Forensic Detective
Why it's wrong here
Oxygen is a comprehensive platform but not specifically focused on bootrom exploits.
✗
Cellebrite UFED
Why it's wrong here
Cellebrite UFED uses various methods, but GrayKey is specifically known for checkm8.
✗
Magnet AXIOM
Why it's wrong here
Magnet AXIOM is a digital forensic platform that supports mobile but is not known for bootrom extraction.
✓
GrayKey
Why this is correct
GrayKey is a tool that leverages the checkm8 bootrom exploit for physical extraction.
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 the distinction between tools that perform logical or file system extractions versus those that exploit hardware-level bootrom vulnerabilities for physical extraction, and the trap here is that candidates may confuse Cellebrite UFED's broader capabilities with GrayKey's specialized, bootrom-specific design.
Detailed technical explanation
How to think about this question
The checkm8 bootrom exploit is a hardware-level vulnerability in the SecureROM of Apple's A5 through A11 chips, allowing arbitrary code execution before the device boots, which enables a physical extraction that bypasses all software-based security (e.g., Secure Enclave, SEP). GrayKey leverages this by putting the device into DFU mode and sending a custom payload via USB to dump the device's NAND flash, including the keybag and encrypted data, which can then be decrypted offline using the device's UID key. In real-world scenarios, this is critical for law enforcement when dealing with locked iOS devices running iOS 12.3 or earlier, as checkm8 cannot be patched by Apple software updates.
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 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.
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: GrayKey — GrayKey is correct because it is a mobile forensic tool specifically designed to exploit the checkm8 bootrom vulnerability (a permanent, unpatchable exploit affecting A5 to A11 chips) to perform a physical extraction of iOS devices. This allows bypassing the device's passcode and extracting the full file system, including encrypted data, without needing to jailbreak the device.
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.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
This CHFI practice question is part of Courseiva's free EC-Council certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the CHFI exam.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.