CEH Footprinting, Reconnaissance and Scanning Practice Question
This CEH practice question tests your understanding of footprinting, reconnaissance and scanning. 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 unusual outbound traffic from an internal host to an external IP on port 443. The analyst suspects a reverse shell where the internal host initiates an HTTPS connection to the attacker. Which Nmap script would be MOST useful to confirm the nature of this traffic if the analyst can run a scan on the internal host?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
http-malware-host
Option C (http-malware-host) is correct because it checks the internal host's DNS cache or HTTP traffic against known malware domains, which can reveal if the outbound HTTPS connection is to a command-and-control server. Since the traffic is on port 443 (HTTPS), this script can identify malicious destinations without decrypting the traffic, making it ideal for confirming a reverse shell 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.
✗
tls-nextprotoneg
Why it's wrong here
This script enumerates TLS next protocol negotiation, not useful for reverse shell detection.
✗
smb-enum-shares
Why it's wrong here
This script enumerates SMB shares and is unrelated to HTTPS traffic.
✓
http-malware-host
Why this is correct
This script checks if the target domain is listed as malicious, which could indicate a command-and-control server.
Related concept
Read the scenario before looking for a memorised answer.
✗
ssh2-enum-algos
Why it's wrong here
This script enumerates SSH algorithms and does not help identify reverse shells.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may choose tls-nextprotoneg (Option A) thinking it analyzes HTTPS traffic, but it only checks protocol negotiation, not malicious destinations, while http-malware-host directly correlates outbound connections with known threat intelligence.
Detailed technical explanation
How to think about this question
The http-malware-host script queries the host's DNS resolver cache or performs HTTP requests to check against a database of known malware domains (e.g., from MalwareDomains.com). In a reverse shell, the internal host often resolves the attacker's domain via DNS before initiating the HTTPS connection, so this script can flag that domain without needing to inspect encrypted payloads. Real-world attackers frequently use HTTPS on port 443 to blend in with normal web traffic, making this script a practical first step in incident response.
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 CEH question in full detail.
Footprinting, Reconnaissance and Scanning — This question tests Footprinting, Reconnaissance and Scanning — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: http-malware-host — Option C (http-malware-host) is correct because it checks the internal host's DNS cache or HTTP traffic against known malware domains, which can reveal if the outbound HTTPS connection is to a command-and-control server. Since the traffic is on port 443 (HTTPS), this script can identify malicious destinations without decrypting the traffic, making it ideal for confirming a reverse shell scenario.
What should I do if I get this CEH 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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