BaaUpdate.exe Suspicious DLL Load (via image_load)

This rule detects BitLocker Access Agent Update Utility (baaupdate.exe) loading DLLs from anomalous locations that are publicly writable which could indicate an attempt to lateral movement via BitLocker DCOM & COM Hijacking. This method abuses COM Classes configured as INTERACTIVE USER to spawn processes in the context of the logged-on user's session. Specifically, it targets the BDEUILauncher Class (CLSID ab93b6f1-be76-4185-a488-a9001b105b94) which can launch BaaUpdate.exe, which is vulnerable to COM Hijacking when started with input parameters. This enables adversaries to execute code in the user's context without needing to steal credentials or use additional methods to compromise the account.