Quick Answer
The answer is Maltego and theHarvester, as both are widely recognized OSINT tools for passive reconnaissance. These tools operate by collecting publicly available information from sources like search engines, DNS records, and social media without directly interacting with the target system, which is the defining characteristic of passive reconnaissance. On the Certified Ethical Hacker CEH exam, this distinction is frequently tested to ensure you understand that passive techniques never send packets to the target, unlike active tools such as Nmap or Nessus. A common trap is confusing theHarvester with active scanning tools because it can gather IPs, but it pulls these from public databases like SHODAN, not from direct probes. Maltego excels at mapping relationships between domains, emails, and people through its transforms, all from open sources. For the exam, remember the memory tip: “Passive means public—no packets, just search and scrape.”
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.
Which TWO of the following are common OSINT tools for passive reconnaissance? (Select 2)
Metasploit
Why wrong: Metasploit is an exploitation framework, not primarily OSINT.
theHarvester
Passively gathers information from search engines, PGP keys, etc.
hping3
Why wrong: hping3 is an active packet crafting tool.
Maltego
Performs passive data collection and link analysis from public sources.
Nmap
Why wrong: Nmap is an active scanning tool.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
theHarvester
theHarvester is a passive OSINT tool that gathers email addresses, subdomains, IPs, and virtual hosts from public sources like search engines (Google, Bing), PGP key servers, and the SHODAN database without sending any packets directly to the target. This aligns with passive reconnaissance, which relies on publicly available information rather than active probing.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Metasploit
Why it's wrong here
Metasploit is an exploitation framework, not primarily OSINT.
theHarvester
Why this is correct
Passively gathers information from search engines, PGP keys, etc.
Related concept
Read the scenario before looking for a memorised answer.
hping3
Why it's wrong here
hping3 is an active packet crafting tool.
Maltego
Why this is correct
Performs passive data collection and link analysis from public sources.
Related concept
Read the scenario before looking for a memorised answer.
Nmap
Why it's wrong here
Nmap is an active scanning tool.
Common exam traps
EC-Council often tests the distinction between passive and active reconnaissance, and the trap here is that candidates confuse tools like Nmap or hping3 (which are active) with passive OSINT tools because they are commonly used in the early stages of an engagement.
Detailed technical explanation
theHarvester leverages APIs and web scraping to extract data from sources like Google dork queries, Bing, and LinkedIn, often returning results in HTML or XML format. Maltego uses transforms to query public databases (e.g., DNS records, WHOIS, social networks) and visualizes relationships as graphs, enabling link analysis without direct target interaction. Both tools respect the passive nature by never initiating a connection to the target's own infrastructure.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A practitioner preparing for the CEH 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.
What to study next
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FAQ
Footprinting, Reconnaissance and Scanning — This question tests Footprinting, Reconnaissance and Scanning — Read the scenario before looking for a memorised answer..
The correct answer is: theHarvester — theHarvester is a passive OSINT tool that gathers email addresses, subdomains, IPs, and virtual hosts from public sources like search engines (Google, Bing), PGP key servers, and the SHODAN database without sending any packets directly to the target. This aligns with passive reconnaissance, which relies on publicly available information rather than active probing.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 30, 2026
This CEH 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 CEH exam.
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