Installation guide: https://github.com/owasp-amass/amass/blob/master/doc/install.md Usage: https://github.com/owasp-amass/amass/blob/master/doc/tutorial.md External Attack surface monitoring using Owasp Amass project. This is also called reconnaissance or information gathering phase to more than 80 sources. It an wonderful tool to use. Results are almost accurate. But you should check if you see a result that is not familiar to you. Because amass taking data from the third party db. So there is a possibility that, that of db giving amass fake data. Though amass apply dns enumeration for better result but still it is worth checking for weird informations. Comes with 3 subcommands. amass intel|enum|db amass intel -- Discover target namespaces for enumerations i.e. target is associated with how many domains!!!! amass enum -- Perform enumerations and network mapping of those domains and sub-domains. amass db -- Manipulate the Amass graph database Amass Intel amass intel ...