Ie4uinit.exe

type: OSBinaries

Executes commands from a specially prepared ie4uinit.inf file.

Full path

c:\windows\system32\ie4uinit.exe
c:\windows\sysWOW64\ie4uinit.exe
c:\windows\system32\ieuinit.inf
c:\windows\sysWOW64\ieuinit.inf

Commands

ExecuteUser T1218
Get code execution by copy files to another location
```
ie4uinit.exe -BaseSettings
```
Executes commands from a specially prepared ie4uinit.inf file.
os: Windows vista, Windows 7, Windows 8, Windows 8.1, Windows 10, Windows 11
Execute: INF

Detection

IOCie4uinit.exe copied outside of %windir%
IOCie4uinit.exe loading an inf file (ieuinit.inf) from outside %windir%
Sigma https://github.com/SigmaHQ/sigma/blob/bea6f18d350d9c9fdc067f93dde0e9b11cc22dc2/rules/windows/process_creation/proc_creation_win_lolbin_ie4uinit.yml

Resources

https://bohops.com/2018/03/10/leveraging-inf-sct-fetch-execute-techniques-for-bypass-evasion-persistence-part-2/

acknowledgement: Jimmy @bohops