I-Worm.Frethem

Worm Frethem spreads in the Internet by e-mail. It comes in messages with infected attachments. Some versions of the worm can infect your PC even if the attachment wasn't executed by a user. The worm uses infected PCs to send its copies to other addresses by e-mail. It also has an integrated backdoor function, which can be used by an attacker to get the full acces to your PC.