assetfinder – Find Related Domains and Subdomains

assetfinder is a Go-based tool to find related domains and subdomains that are potentially related to a given domain from a variety of sources including Facebook, ThreatCrowd, Virustotal and more.

assetfinder uses a variety of sources including those in the infosec space and social networks which can give relevant info:

• crt.sh


• certspotter


• hackertarget


• threatcrowd


• wayback machine


• dns.bufferover.run


• facebook – Needs FB_APP_ID and FB_APP_SECRET environment variables set (https://developers.facebook.com/) and you need to be careful with your app’s rate limits


• virustotal – Needs VT_API_KEY environment variable set (https://developers.virustotal.com/reference)


• findsubdomains – Needs SPYSE_API_TOKEN environment variable set (the free version always gives the first response page, and you also get “25 unlimited requests”) — (https://spyse.com/apidocs)

Sources to be implemented:

• http://api.passivetotal.org/api/docs/


• https://community.riskiq.com/ (?)


• https://riddler.io/


• http://www.dnsdb.org/


• https://certdb.com/api-documentation

Usage of assetfinder to Find Related Domains and Subdomains

The usage is very simple with only one option basically, to limit the search to subdomains only – by default it will scan for all associated domains and subdomains.

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