Zlob

Zlob fake codec has been update. It drops the following file:

%SYSTEM%\gtckad.dll

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\SharedTaskScheduler]
"{61d70260-527c-44e8-bb23-2243e93808d3}"="achromatic"

It also installs Toolbar, BHO, Virus Response Lab 2009 software...

SmitfraudFix removes the infection.