AccCheckConsole.exe

Commands

1. ExecuteUser T1218

   Local execution of managed code from assembly DLL.

   AccCheckConsole.exe -window "Untitled - Notepad" {PATH_ABSOLUTE:.dll}

   Load a managed DLL in the context of AccCheckConsole.exe. The -window switch value can be set to an arbitrary active window name.

   os: Windows

   Execute: DLL (.NET)

2. AWL BypassUser T1218

   Local execution of managed code to bypass AppLocker.

   AccCheckConsole.exe -window "Untitled - Notepad" {PATH_ABSOLUTE:.dll}

   Load a managed DLL in the context of AccCheckConsole.exe. The -window switch value can be set to an arbitrary active window name.

   os: Windows

   Execute: DLL (.NET)

Detection

• Sigma https://github.com/SigmaHQ/sigma/blob/19396788dbedc57249a46efed2bb1927abc376d4/rules/windows/process_creation/proc_creation_win_lolbin_susp_acccheckconsole.yml
• IOCSysmon Event ID 1 - Process Creation
• Analysis https://gist.github.com/bohops/2444129419c8acf837aedda5f0e7f340

Code samples

• https://docs.microsoft.com/en-us/windows/win32/winauto/custom-verification-routines

Resources

• https://gist.github.com/bohops/2444129419c8acf837aedda5f0e7f340
• https://twitter.com/bohops/status/1477717351017680899