Email Contact Hyjacking on Yahoo

Any body know of a virus, worm or trojan horse that hyjacks your contact list and sends email ads to your contacts impersonating you? Anything on the web to detect it? And of course remove it?
Brother called about getting the message. Has a website that requires one to activate the Chinese language. Help Thor

 

Where ever it gets the most exposure. When I posted it there was nothing called "News". Still don't see that category. Thanks Thor

 

Thor as far as i know the love letter virus did that. However is very unusual you got inffected with it. But hey..... the more security,the more challenging for the virus programers.
I know a "Thor",how long you have that nick?