1/14: Mugly-F Worm Uses Own SMTP Engine
January 14, 2005

W32.Mugly.F@mm is a worm that uses its own SMTP engine to spread by sending itself as an email attachment to addresses gathered from the compromised computer. The worm also drops and runs a W32.Spybot.Worm variant.

Technical details can be found at Symantec page.