.. /Runexehelper.exe
Star

Launcher process

Paths:

c:\windows\system32\runexehelper.exe

Resources:

https://twitter.com/0gtweet/status/1206692239839289344

Acknowledgements:

Grzegorz Tworek (@0gtweet)

Detection:

Sigma: https://github.com/SigmaHQ/sigma/blob/197615345b927682ab7ad7fa3c5f5bb2ed911eed/rules/windows/process_creation/proc_creation_win_lolbin_runexehelper.yml
IOC: c:\windows\system32\runexehelper.exe is run
IOC: Existence of runexewithargs_output.txt file

Execute

Launches the specified exe. Prerequisites: (1) diagtrack_action_output environment variable must be set to an existing, writable folder; (2) runexewithargs_output.txt file cannot exist in the folder indicated by the variable.
```
runexehelper.exe c:\windows\system32\calc.exe
```
Use case
Executes arbitrary code

Privileges required
User

Operating systems
Windows 10, Windows 11, Windows Server 2012, Windows Server 2016, Windows Server 2019, Windows Server 2022

ATT&CK® technique
T1218