PetitPotam? Microsoft Defender for Identity has it covered! - Microsoft Tech Community
The EFSRPC protocol that PetitPotam exploits is typically used to maintain and manage encrypted data that is stored remotely and accessed over a network. It’s mainly used to manage Windows files that reside on remote file servers and are encrypted using the Encrypting File System (EFS). Using the PetitPotam vector, an adversary can manipulate MS-EFSRPC API functions without authentication using the OpenEncryptedFileRaw calls. This allows the adversary to force a domain controller to authenticate to an NTLM relay server under the attacker's control.