The subtle (or not so) modification of permissions in IaaS, SaaS, Active Directory, high level objects or filesystems for persistence is an orders or magnitude problem manual signatures likely won't scale to meet.

This tradecraft by Alh4zr3d is pain ..

https://www.reddit.com/r/blueteamsec/comments/11p7ky0/windows_a_fileless_persistent_local_privilege/?utm_source=share&utm_medium=android_app&utm_name=androidcss&utm_term=1&utm_content=share_button

Windows a file-less, persistent, local privilege escalation backdoor and detection approach

​ sc.exe sdset scmanager D:(A;;KA;;;WD) Setting the security descriptor on the service manager to allow anyone to start SYSTEM...

reddit

I deliver two MSc modules, one of which covers this type of scenario and the complexity of the challenge..

Sounds easy doesn't it?

@ollie_whitehouse
Holy crap, we'd never find this. And I can't even get the helpdesk to reimage machines after a compromise.