Find sigma rule 
Attack: Signed Binary Proxy Execution: InstallUtil
Adversaries may use InstallUtil to proxy execution of code through a trusted Windows utility. InstallUtil is a command-line utility that allows for installation and uninstallation of resources by executing specific installer components specified in .NET binaries. (Citation: MSDN InstallUtil) The InstallUtil binary may also be digitally signed by Microsoft and located in the .NET directories on a Windows system: C:\Windows\Microsoft.NET\Framework\vC:\Windows\Microsoft.NET\Framework64\v
InstallUtil may also be used to bypass application control through use of attributes within the binary that execute the class decorated with the attribute [System.ComponentModel.RunInstaller(true)]. (Citation: LOLBAS Installutil)
MITRE
Tactic
- defense-evasion
technique
- T1218.004
Test : CheckIfInstallable method call
OS
- windows
Description:
Executes the CheckIfInstallable class constructor runner instead of executing InstallUtil. Upon execution, the InstallUtil test harness will be executed. If no output is displayed the test executed successfuly.
Executor
powershell
Sigma Rule
-
posh_ps_win_api_susp_access.yml (id: 03d83090-8cba-44a0-b02f-0b756a050306)
-
file_event_win_csharp_compile_artefact.yml (id: e4a74e34-ecde-4aab-b2fb-9112dd01aed0)
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proc_creation_win_csc_susp_dynamic_compilation.yml (id: dcaa3f04-70c3-427a-80b4-b870d73c94c4)