It has recently come to my attention that there may be a problem with the AC Web Ultimate Repack 7.7 from "ac-web.org". I have had two friends that downloaded this repack on the same night, and both of their retail WoW accounts have gotten hacked. Then just last night, my friend's account, created 5 days ago, was just hacked. He had also downloaded this repack.
Therefore, I suspect that a keylogger exists inside of the program. A keylogger gets inside your system, hides, and knows what you typed, and where, including passwords. The impact of the keylogger depends on the person running it, this person, I believe, is only after warcraft accounts. However, I'm not certain and this keylogger could find out your bank account, Myspace, Facebook, WoW account, anything you type on the computer you downloaded this from.
As I have said, it's only a guess, but I am pretty certain. Therefore, if you suspect you have a keylogger, there are two ways to solve it, one is a way around it, the other is to get rid of it.
To get rid of it, simply wipe your hardrive, and re-install Windows.
A more simple, and less drastic way is to go into Control Panel>Accessibility>On Screen Keyboard. Therefore since the keylogger detects keystrokes, you can simply click the button on the on screen keyboard. Therefore, anytime you insert personal information, Passwords or usernames etc., use the keyboard.
Hope this helps,
-Ledz