Shdocvw.dll

Commands

1. ExecuteUser T1218.011

   Load an executable payload by calling a .url file with or without quotes. The .url file extension can be renamed.

   rundll32.exe shdocvw.dll,OpenURL {PATH_ABSOLUTE:.url}

   Launch an executable payload via proxy through a URL (information) file by calling OpenURL.

   os: Windows 10, Windows 11

   Execute: URL

Detection

• Sigma https://github.com/SigmaHQ/sigma/blob/62d4fd26b05f4d81973e7c8e80d7c1a0c6a29d0e/rules/windows/process_creation/proc_creation_win_rundll32_susp_activity.yml

Code samples

• https://gist.githubusercontent.com/bohops/89d7b11fa32062cfe31be9fdb18f050e/raw/1206a613a6621da21e7fd164b80a7ff01c5b64ab/calc.url

Resources

• http://www.hexacorn.com/blog/2018/03/15/running-programs-via-proxy-jumping-on-a-edr-bypass-trampoline-part-5/
• https://bohops.com/2018/03/17/abusing-exported-functions-and-exposed-dcom-interfaces-for-pass-thru-command-execution-and-lateral-movement/
• https://twitter.com/bohops/status/997690405092290561
• https://windows10dll.nirsoft.net/shdocvw_dll.html