🪟 LOLBAS / Url.dll

Url.dll

Internet Shortcut Shell Extension DLL.

Paths

  • c:\windows\system32\url.dll
  • c:\windows\syswow64\url.dll

Commands

Execute

Launch a HTML application payload by calling OpenURL.

Use case: Invoke an HTML Application via mshta.exe (Default Handler).

Privileges: User

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

Execute

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

Use case: Load an executable payload by calling a .url file.

Privileges: User

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

Execute

Launch an executable by calling OpenURL.

Use case: Load an executable payload by specifying the file protocol handler (obfuscated).

Privileges: User

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

Execute

Launch an executable by calling FileProtocolHandler.

Use case: Launch an executable.

Privileges: User

rundll32.exe url.dll,FileProtocolHandler {PATH_ABSOLUTE:.exe}

Execute

Launch an executable by calling FileProtocolHandler.

Use case: Load an executable payload by specifying the file protocol handler (obfuscated).

Privileges: User

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

Execute

Launch a HTML application payload by calling FileProtocolHandler.

Use case: Invoke an HTML Application via mshta.exe (Default Handler).

Privileges: User

rundll32.exe url.dll,FileProtocolHandler file:///C:/test/test.hta

Detection

Resources