There is an
flash exploit that is circulating around that does the above stated. It looks like
several sites have this code embedded, which is a simple flash object.
The trojan uses an exploit in flash in order to install either keyloggers or rootkits, depending on the flavor of trojan. One of them edits your host files so when you go to worldofwarcraft.com it takes you to another place entirely. Since the attack goes thru Flash, pretty much every browser is vulnerable - IE, FF, Chrome, Safari - you name it. Even updating flash to the latest version doesn't help. Watch out.