Finally got root!! Thanks, @MrR3boot for this box, and @hlyblyhakr for the hints.
Hints for this box:
User
- Listen to the responses
- Don’t brute force, you won’t get anything from it
- Dirbuster is not your friend
- Boxname is a really big hint
Root
- Standard enum and get the flag with one simple command
gtfobins
For more hints, PM me. But be clear where you got stuck and what you already have done.