The Bagle worm has been resurrected, and in the past couple of hours there
have been 3 new variants discovered. The biggest threat is that they appear
to be coming in waves, and there could be a LOT of activity from these
variants, and others.
All of them are non-destructive, and send themselves via e-mail. The
require you to open an attachment that looks like a harmless one because the
icon looks like a Windows program (word, notepad, etc.).
Unless you are sure that the attachment came from a trusted person, and
remember that the sender's address is faked by the worm, do not open them!
Mark Rider
Source: Common Sense Security
Keep your eye's open and delete those attachments