Like many other worms, Sober tries to use social engineering to encourage recipients to open the attachments of its emails. Sober.Y, or perhaps Sober.Z, sends a message that claims to be from the Police (FBI, CIA, or the German BKA), saying that visits to illegal websites have been detected, and the recipient should fill in the attached questionnaire. A resident of Padenborn, Germany received one of these messages and turned himself in to the Police, who found pornographic images of children on his computer.
A police spokesman commented, "It just goes to show that computer worms aren't always destructive". A fairer comment might be that stupid criminals get caught.
