The Workflow Command-line Compiler tool is included with the Windows Software Development Kit (SDK).
wfc.exe c:\path\to\test.xoml
Execute arbitrary C# code embedded in a XOML file.
Execute proxied payload with Microsoft signed binary to bypass WDAC policies
C:\Program Files (x86)\Microsoft SDKs\Windows\v10.0A\bin\NETFX 4.8 Tools\wfc.exe
BlockRule: https://docs.microsoft.com/en-us/windows/security/threat-protection/windows-defender-application-control/microsoft-recommended-block-rules, Sigma: https://github.com/SigmaHQ/sigma/blob/6b34764215b0e97e32cbc4c6325fc933d2695c3a/rules/windows/process_creation/proc_creation_win_lolbin_wfc.yml, IOC: As a Windows SDK binary, execution on a system may be suspicious
Matt Graeber (@mattifestation), Jimmy (@bohops)