The correct answer is webshell access because the HTTP request GET /wp-content/uploads/evil.php?cmd=id reveals an attacker executing a system command (id) through a PHP file hidden in the uploads directory, which is the classic signature of webshell detection via HTTP command parameter analysis. Webshells are malicious scripts that accept command parameters like cmd to run arbitrary OS commands on the server, bypassing normal authentication. On the Computer Hacking Forensic Investigator CHFI exam, this scenario tests your ability to distinguish between normal file access and command execution in HTTP traffic—a common trap is confusing this with a simple file upload or directory traversal attack. The key forensic indicator is the cmd parameter paired with a system command like id, whoami, or ls, which reveals active command-and-control behavior. Memory tip: If you see a GET with a command parameter pointing to a script in a writable directory, think “Webshell in the wild.”
CHFI OS and Network Forensics Practice Question
This CHFI practice question tests your understanding of os and network 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 network analyst captures traffic and sees an HTTP request containing: GET /wp-content/uploads/evil.php?cmd=id HTTP/1.1. Which of the following is MOST likely occurring?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Webshell access
The request attempts to execute a command (id) via a PHP file in the uploads directory, indicating a webshell. Webshells allow attackers to execute commands on the server.
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.
✓
Webshell access
Why this is correct
The request to a PHP file with a cmd parameter suggests a webshell that allows command execution.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
SQL injection attack
Why it's wrong here
SQL injection targets databases, not command execution via a PHP file.
✗
Cross-site scripting (XSS) attack
Why it's wrong here
XSS injects scripts into web pages, not direct command execution via a PHP file.
✗
Directory traversal attack
Why it's wrong here
Directory traversal uses ../ sequences to read files, not command execution.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Trap categories for this question
Command / output trap
SQL injection targets databases, not command execution via a PHP file.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
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.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→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.
Identify which CHFI exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
OS and Network Forensics — This question tests OS and Network Forensics — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Webshell access — The request attempts to execute a command (id) via a PHP file in the uploads directory, indicating a webshell. Webshells allow attackers to execute commands on the server.
What should I do if I get this CHFI question wrong?
Identify which CHFI exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Are there clue words in this question I should notice?
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
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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