Welcome to the Virus Encyclopedia of Panda Security.
Frethem.K is a worm that reaches computers via e-mail in the files DECRYPT-PASSWORD.EXE and PASSWORD.TXT attached to a message with the subject Re:Your password!.
It is easy to be infected by Frethem.K, as it activates when the message carrying the worm is viewed through Outlook Express' Preview Pane.
Frethem.K is not considered dangerous, as its only aim is to spread to other computers without carrying out any damaging actions.
A clear indication that you have received Frethem.K is an e-mail message with the following characteristics: