http://news.yahoo.com/s/nf/20050526/bs_nf/35651Instant messaging users are being warned of new security threats affecting Yahoo (Nasdaq: YHOO - news) and AOL (NYSE: AOL - news).
The worm launched through AOL's Instant Messenger (AIM) attempts to open a backdoor in a user's system so an attacker can gain control of the machine.
Yahoo Messenger users, meanwhile, are being targeted in a phishing scheme that tries to convince them to hand over their Yahoo credentials.
Aiming High
The threat affecting AOL arrives in a user's IM system with the message "hehe i found this funny movie," and prompts users to click on a hyperlink.
If a user does so, then malicious code is downloaded onto their system, and the worm wiggles onto a public IRC server so it can spread to other AIM users. The code appears to be a variant of the Gaobot virus, which allows an attacker remote control over an affected PC.
The worm has been rated as a medium threat by IMLogic, and some security firms have noted that its spread is being checked by the rapid response of anti-virus companies.