- March 26, 2004
- March 26, 2004 3:53:07 PM
- Windows 2000, Windows 95, Windows 98, Windows Me, Windows NT, Windows XP
W32.Beagle.U@mm is a mass-mailing worm that opens a backdoor on TCP port 4751 and uses its own SMTP engine to spread through email. The worm arrives as a blank email with a randomly named attachment. If the compromised system's clock year is 2005 or later, the worm will not run.