assetfinder is a command-line tool designed to find domains and subdomains associated with a specific domain.
Use this tool only on systems you own or have explicit permission to test.
The main objective of the tool is to help security researchers and IT professionals discover and understand how the domains and sub-domains of a given organization are distributed, trying to find possible security flaws and vulnerabilities.
assetfinder uses multiple data sources to perform its research, including:
- crt.sh
- certspotter
- hackertarget
- threatcrowd
- Wayback Machine
- dns.bufferover.run
- Facebook Graph API
- Virustotal
- findsubdomains
This expands coverage and increases the accuracy of results.