AD User Comments

There might be some credentils in user account comments in active directory, check for it:

crackmapexec ldap 10.0.2.11 -u 'username' -p 'password' --kdcHost 10.0.2.11 -M get-desc-users
GET-DESC... 10.0.2.11       389    dc01    [+] Found following users: 
GET-DESC... 10.0.2.11       389    dc01    User: Guest description: Built-in account for guest access to the computer/domain
GET-DESC... 10.0.2.11       389    dc01    User: krbtgt description: Key Distribution Center Service Account

There are 3-4 fields that seem to be common in most AD schemas: UserPassword, UnixUserPassword, unicodePwd and msSFU30Password.

enum4linux | grep -i desc

Get-WmiObject -Class Win32_UserAccount -Filter "Domain='COMPANYDOMAIN' AND Disabled='False'" | Select Name, Domain, Status, LocalAccount, AccountType, Lockout, PasswordRequired,PasswordChangeable, Description, SID

or dump the Active Directory and grep the content.

ldapdomaindump -u 'DOMAIN\john' -p MyP@ssW0rd 10.10.10.10 -o ~/Documents/AD_DUMP/