Recently I received a few spam messages from my friends in Yahoo Message. The spam usually look like this:
Wanna lose a lot of weight without diets or excercise? Kathy and I have both lost over 30 pounds in a couple weeks just by taking Acai pills daily, the same ones that Oprah talked about on her show. They are only five dollars to try, We get them from *******.com
Finally after all this time I found the only way to lose a lot of weight in just a few weeks and not have to diet or excercise. I seen it on Oprah and Cnn, ordered it and lost 36 pounds in just a few weeks and still losing, they have it now for only five dollars to try at ******.com
I cant find much information about this worm/virus, but remember not to click on any links that you think is suspicious! (even it is from your friend) Try asking your friend whether they send the message if you are unsure whether it is a spam or genuine message from your friend.
Update: According to commenter Sweet_lullaby, changing your password might help to solve the problem. Do give you feedback in the comment if this method works for you.