Zipfldr.dll

Commands

1. ExecuteUser T1218.011

   Launch an executable.

   rundll32.exe zipfldr.dll,RouteTheCall {PATH:.exe}

   Launch an executable payload by calling RouteTheCall.

   os: Windows 10, Windows 11

   Execute: EXE

2. ExecuteUser T1218.011

   Launch an executable.

   rundll32.exe zipfldr.dll,RouteTheCall file://^C^:^/^W^i^n^d^o^w^s^/^s^y^s^t^e^m^3^2^/^c^a^l^c^.^e^x^e

   Launch an executable payload by calling RouteTheCall (obfuscated).

   os: Windows 10, Windows 11

   Execute: EXE

Detection

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

Resources

• https://twitter.com/moriarty_meng/status/977848311603380224
• https://twitter.com/bohops/status/997896811904929792
• https://windows10dll.nirsoft.net/zipfldr_dll.html