Beagle Virus
This is one of the latest in the Beagle family. The Beagle family of worms sends a password protected zip file. The W32.Beagle.K@mm variant appears to come from your Internet Service Provider using management, administration, staff, noreply, or support addresses with a notice about your e-mail account in order to trick you into opening the infected attachment.
For more information about this worm see Symantec's Security Response for the W32.Beagle.K@mm worm.