Steals Details for :
Steam
MSN
Firefox
Internet Explorer 7
Internet Explorer 8
FlashFXP
IMVU
DynDNS
NO-IP
Pidgin
Trillian
Google (Keylogs it)
Paypal (Keylogs it)
Yahoo (Keylogs it)
Pretty much any login / application or web browser window it will keylog all typed in / entered details / info. this is why it is able to accomplish so much.
Stealer Settings :
Set process priority levels
Rename itself in Taskmanger
Fake Error
BSOD (Blue Screen Of Death)
Encrypt your account details so nobody decompiles the app and steals your account.
Downloader
Clone File info
Send data via FTP and Email
Builder GUI / Features :
Minimize to tray
Smooth application Skin and Transparency
Play Music
 Screenshots :

Video: http://www.youtube.com/watch?v=RxHH3BsM5vs
Quelle: Universal 1337 V3 - The Account Stealer - Steam-Hacks Forum