FUD UAC Bypass on an MDE Protected Endpoint via Profiling DLL

FUD UAC Bypass on an MDE Protected Endpoint via Profiling DLL

“The .NET Framework can be made to load a profiling DLL or a COM component DLL via user-defined environment variables and CLSID registry entries, even when the process is elevated. This behavior can be exploited to bypass UAC in default settings on Windows 7 to 10.” Our team is quite impressed with the amount of operationalized counter cyber intelligence (CCI) we are able to distill from our data, after the Cyber Fist search upgrade. MDE has done a pretty good job mitigating UAC bypasses but we were able to use a technique found using Cyber Fist that ran FUD. Full details can be found below:
 
 
Blog1: https://3gstudent.github.io/Use-CLR-to-bypass-UAC
 
 
Blog2: https://offsec.almond.consulting/UAC-bypass-dotnet.html
 
 
 
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