Welcome to the Virus Encyclopedia of Panda Security.
Frethem.F is a worm that spreads via e-mail in a message with the subject Re: Your password!.
Both the subject and the content of the message try to trick recipients into running the attachment by making them believe that it contains a password.
However, when the file is run, Frethem.F carries out the actions necessary to send itself via e-mail through an SMTP connection.
Frethem.F is not considered dangerous, as the only action it carries out is to send itself out via e-mail. However, mass mailing of this worm could collapse mail accounts.
A clear indication that you have received Frethem.F is an e-mail message with the following characteristics:
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