W32.Mydoom.U@mm

W32.Mydoom.U@mm is a mass-mailing worm that uses its own SMTP engine to send itself to the email addresses that it finds on an infected computer. The subject and message body vary, and the attachment has a .bat, .cmd, .exe, .pif, .scr, or .zip extension. It is similar to W32.Mydoom.P@mm.

Virus definitions dated prior to September 9, 2004 detect this threat as W32.Mydoom.gen@mm.

Protection

• Initial Rapid Release version September 10, 2004
• Latest Rapid Release version July 26, 2008 revision 017
• Initial Daily Certified version September 10, 2004
• Latest Daily Certified version January 20, 2009 revision 048
• Initial Weekly Certified release date September 15, 2004

Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.

Threat Assessment

Wild

• Wild Level: Low
• Number of Infections: 0 - 49
• Number of Sites: 0 - 2
• Geographical Distribution: Low
• Threat Containment: Easy
• Removal: Easy

Damage

• Damage Level: Medium

Distribution

• Distribution Level: High