Zlob fake codec has been update. It drops the following file:
%SYSTEM%\rtmipr.dll
[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\SharedTaskScheduler]
"{e89fa8e9-5c0b-45f6-a70e-f7b177bcd193}"="delayingly"
It also installs Toolbar, BHO, VirusHeat Rogue software...
SmitfraudFix removes the infection.