Internet Shortcut Shell Extension DLL.

Paths:

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

Detection:

Execute

Launch a HTML application payload by calling OpenURL.

rundll32.exe url.dll,OpenURL "C:\test\calc.hta"

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

rundll32.exe url.dll,OpenURL "C:\test\calc.url"

Launch an executable by calling OpenURL.

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

Launch an executable by calling FileProtocolHandler.

rundll32.exe url.dll,FileProtocolHandler calc.exe

Launch an executable by calling FileProtocolHandler.

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

Launch a HTML application payload by calling FileProtocolHandler.

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