ForgeCert VS PetitPotam

I expect an increasing number of attacks on Active Directory Certificate Services. In fact, a PetitPotam with ADCS NTLM Relaying attack has already come out since the SpecterOps paper was published, and SpecterOps is releasing ForgeCert, the Golden Ticket of Certificates, at BlackHat 2021. Therefore, it’s urgent to check for misconfigurations in your environment and remediate them promptly, and then to repeat the process on a regular basis.

With unconstrained delegation you may be able to use Petitpoatm (https://github.com/topotam/PetitPotam) to coerce the DC to connect, which would provide you the DC$ machine account. Then you could use that to perform a DCSync attack to get the krbtgt account hash to craft golden tickets. It's worth checking out.

I expect an increasing number of attacks on Active Directory Certificate Services. In fact, a PetitPotam with ADCS NTLM Relaying attack has already come out since the SpecterOps paper was published, and SpecterOps is releasing ForgeCert, the Golden Ticket of Certificates, at BlackHat 2021. Therefore, it’s urgent to check for misconfigurations in your environment and remediate them promptly, and then to repeat the process on a regular basis.

The actual weaponised petitepotam excutable has not been subject to such a filter: https://github.com/topotam/PetitPotam

Lionel Gilles, a French-based Offensive Computer Security researcher at Sogeti, an IT services company based in Paris, France (@topotam77 on Twitter), recently published a PoC tool called PetitPotam, which exploits the MS-EFSRPC (Encrypting File Services Remote Protocol).