Everything else, VORNAC finds itself.
Subdomains, services, cloud resources, systems of subsidiaries under other brands, assets that appear in no inventory. The picture is rebuilt every day, from the outside, as an attacker sees it. And because an attack surface is not only systems: the credentials of your employees are watched continuously for appearances in leaks, stealer logs and darknet marketplaces. A leaked password is often the more convenient route than any vulnerability, and without monitoring a company learns of it only once it has been used.