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 observes a process on a Windows system creating a mutex named "Global\{5B9E4E7E-8B2C-4F6D-A1A3-F2C8D9E0A1B2}" shortly after execution. The analyst also notes outbound connections to an IP address 203.0.113.50 on port 4444. Which malware behaviour indicator is MOST clearly demonstrated?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Single-instance execution safeguard and command and control communication
The mutex name 'Global\{5B9E4E7E-8B2C-4F6D-A1A3-F2C8D9E0A1B2}' is a well-known technique used by malware to ensure only one instance of itself runs on the system, preventing conflicts or multiple infections. The outbound connection to 203.0.113.50 on TCP port 4444 is a classic indicator of command and control (C2) communication, as port 4444 is commonly associated with reverse shells and C2 traffic (e.g., Metasploit default). Together, these two behaviors directly demonstrate single-instance execution safeguard and C2 communication.
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.
✗
Anti-debugging technique through timing checks
Why it's wrong here
Anti-debugging might involve IsDebuggerPresent or timing checks; mutex creation is not primarily anti-debugging.
✓
Single-instance execution safeguard and command and control communication
Why this is correct
Mutex ensures only one instance runs; outbound connection indicates C2.
Related concept
Read the scenario before looking for a memorised answer.
✗
File encryption using a hardcoded AES key
Why it's wrong here
No file encryption behaviour is described.
✗
Persistence mechanism via registry run keys
Why it's wrong here
Persistence would involve writing to registry keys like Run or RunOnce; no such evidence is shown.
Common exam traps
Common exam trap: answer the scenario, not the keyword
EC-Council often tests the distinction between behavioral indicators (like mutex and network connections) and specific malware capabilities (like encryption or persistence), leading candidates to confuse a single-instance safeguard with anti-debugging or persistence techniques.
Trap categories for this question
Command / output trap
Persistence would involve writing to registry keys like Run or RunOnce; no such evidence is shown.
Detailed technical explanation
How to think about this question
Mutex objects in Windows are named synchronization primitives; the 'Global\' prefix places the mutex in the global namespace, visible across all sessions, which is often used by malware to prevent multiple instances in multi-user environments. Port 4444 is a non-standard port frequently used by backdoors like Meterpreter and Netcat for reverse shells, and the outbound connection to a specific IP indicates the malware is beaconing out to a C2 server. In real-world forensics, correlating mutex creation with network connections is a key step in identifying malware families like PoisonIvy or DarkComet.
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: Single-instance execution safeguard and command and control communication — The mutex name 'Global\{5B9E4E7E-8B2C-4F6D-A1A3-F2C8D9E0A1B2}' is a well-known technique used by malware to ensure only one instance of itself runs on the system, preventing conflicts or multiple infections. The outbound connection to 203.0.113.50 on TCP port 4444 is a classic indicator of command and control (C2) communication, as port 4444 is commonly associated with reverse shells and C2 traffic (e.g., Metasploit default). Together, these two behaviors directly demonstrate single-instance execution safeguard and C2 communication.
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.