New worm emerged early this week, variously named “Oscarbot-B” and “Doyorg” by antivirus companies, are targeting users of AOL’s instant messaging software, AIM. Something similar to the recent MSN worm, I think.

Quoted:
The Windows-based malware emerged early this week, and has made itself a nuisance for its ability to hijack the list of contacts or “buddies” in an infected user’s IM account. After opening a window to any one of these contacts with the message “Hey check this out“, it invites users to follow an embedded link. Anyone who clicks on this will risk becoming its next victim.

The worm creates a backdoor into Internet Relay Chat (IRC) to download and run files on machines where infection is successful, commanded by the instruction of the attacker, hence, giving remote access to that infected PC.

So, all AIM users, please be aware of all the links your buddies sent you, re-confirm with them before clicking it is always an advisable idea.

[Source]