Overview -

--- Update May 6th, 2008 --
Due to an increase in prevalence being seen by our VirusScan Online Customers, the risk assessment of this threat was upgraded to Medium for Home Users and Low Profiled for Corporate Users.

Downloader-UA.h trojans are fake music and video files associated with fastmp3player.com.
Characteristics
Characteristics -

Downloader-UA.h trojans are fake music and video files associated with fastmp3player.com.

File sizes vary as these files are padded with nulls. The file names varies as well. Here are some of the samples file names.

preview-t-3545425-adult.mpg
preview-t-3545425-changing times earth wind .mp3
preview-t-3545425-girls aloud st trinnians.mp3
preview-t-3545425-heartbroken fast t2 ft jodie.mp3
preview-t-3545425-jij bent zo jeroen van den.mp3
preview-t-3545425-meet bambi in kings harem.mp3
preview-t-3545425-middle eastern chick.mpg
preview-t-3545425-paint me bunmingham.mp3
preview-t-3545425-paralyized by you.mp3
preview-t-3545425-pull over levert.mp3
preview-t-3545425-say it right remix.mp3
preview-t-3545425-st trinnians girls aloud.mp3
preview-t-3545425-theme godfather.mp3
t-3545425-bentley bizzle.mp3
t-3545425-dx vs randi orton 2007.mpg
t-3545425-haloween special.mp3
t-3545425-just got lucky.mp3
t-3545425-lion king portugues.mpg
t-3545425-los padres de ella.mpg
t-3545425-para sayo freestyle.mp3
t-3545425-peanut butter jelly amende.mp3
t-3545425-stare at sun thrice.mp3
t-3545425-suicide bride dana.mp3
t-3545425-wayne and jane.mp3

When a user attempts to load one of these MP3 and MPG files, they do not get the music/video they were hoping for; instead they are directed to download a file named PLAY_MP3.exe. In fact, the MP3/MPG file they downloaded was completely fake, playing no media clip what so ever.

If users agree to download and run PLAY_MP3.exe (detected as Generic PUP.a with McAfee DAT files) a 4,800 word EULA is displayed.

Method of Infection -

Downloader-UA.h trojans are propagated through P2P networks