W32.Beagle.T@mm

W32.Beagle.T@mm is a mass-mailing worm that opens a backdoor on TCP port 2556 and uses its own SMTP engine to spread through email. The worm arrives as a HTML email with no attachment, the email is designed to exploit the Microsoft Internet Explorer object type validation vulnerability (BID 8456), if successfully exploited W32.Beagle.T@mm will be downloaded from a remote site and executed without user intervention.

W32.Beagle.T@mm also attempts to spread across file-sharing networks, such as KazaA and iMesh, by dropping itself into the directories that contain "shar" in their names.

This variant also contains a file infection routine that infects portable executable files with an .exe extension.