IE Defender/Files Secure/MalwareBell/IE Antivirus/Total Secure 2009 Codec has been update, it installs a file with semi-random filename composed from a dictionary:
hh, jo, ahg, fc, xda, sd
Possible filenames are:
hhahgxda.dll, hhahgsd.dll, hhfcxda.dll, hhfcsd.dll, joahgxda.dll, joahgsd.dll, jofcxda.dll, jofcsd.dll
It displays alert messages with popups that download WinDefender 2009:
It also drops Internet Shortcut on the desktop, Favorites, Start Menu: Cheap Pharmacy Online.url , Search Online.url, SMS Trap.url and VIP Casino.url
Once installed, it connects to a server, downloads a config. file that contains various error messages to display and URL of malwares to download and installs.
Use SmitfraudFix to remove the infection.