The Trojan is able to suppress warning messages displayed by Microsoft AntiSpyware, and will also delete all of the files in the program's directory. It will also try to steal passwords and steal online banking details.
"This appears to be the first attempt yet by any piece of malware to disable Microsoft AntiSpyware. As Microsoft's product creeps out of beta and is adopted more by the home user market, we can expect to see more attempts by Trojan horses, viruses and worms to undermine its effectiveness." - Graham Cluley, senior technology consultant for Sophos.