Secunia has issued a medium level alert for Mydoom.n. It is a mass-mailing worm that uses its own SMTP engine to spread through email and opens a backdoor on TCP port 1080. The subject line, body, and attachment name of the email vary. The attachment will have a .com, .cpl, .exe, .scr, or .zip file extension. If the file attachment is a .zip file, it will be password protected. This zip file will be detected as W32.Beagle@mm!zip.
This worm runs on Windows 95, 98, ME, NT, 2000, and XP.
For more information, go to: http://secunia.com/virus_information/10742/