Most Popular LOLBAS 2026: InstallUtil /U Flag Execution Bypassing AppLocker

Ibrahim Saud@tektrix

•updated 16 days ago•0•0•0

Detects the execution of the Windows binary InstallUtil.exe using specific flags (/logfile=, /LogToConsole=false, and /U) commonly used to execute arbitrary .NET code while bypassing application control mechanisms such as AppLocker or Windows Defender Application Control (WDAC).