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Application & OT Security · Foundational

theHarvester

An OSINT tool that gathers emails, subdomains, hosts and names from public sources such as search engines and certificate logs.

Definition

theHarvester queries sources including search engines, crt.sh, DNSDumpster and various APIs to build lists of addresses and names for a domain. Results support phishing target lists and subdomain discovery. It is included in Kali Linux.

Example

theHarvester -d example.com -b crtsh,duckduckgo

Exam tip

The tool for harvesting email addresses for a phishing campaign is typically theHarvester.

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