According to Ars Technica second Trojan Horse has shown up to steal your World of Warcraft Account and password.  This is a different trojan besides the one reported a couple of weeks ago. Keep your eyes peeled! Never download any UI Mods that require you to install an .EXE file (executable):

According to Symantec, a new trojan called “Infostealer.Wowcraft” is making the rounds. Unlike many malicious programs, however, it makes no attempt to steal your credit card information. Instead, it goes after something much more personal?your World of Warcraft account.