New worm spreads through Yahoo messenger
A worm has begun spreading via Yahoo Instant Messenger that tricks people into downloading what they think is a photo from a friend but is instead malware that installs a backdoor Windows system and spreads to a victim's instant messenger contacts.
The worm arrives via a message from a contact with the word "photo" or "photos" and a smiley face icon, along with a link to a website resembling a Facebook page, MySpace page, or some other page where photos might reside.
If the user clicks on the link on a Macintosh system, an executable file will be downloaded, but no further action will occur. On a Windows system, the executable will download and if the user runs the file, the computer will become infected and the malicious message will be distributed to all of the IM contacts.
