W32.Mytob.EZ@mm

W32.Mytob.EZ@mm is a mass-mailing worm that uses its own SMTP engine to send an email to addresses that it gathers from the compromised computer. The worm spreads through the network by exploiting the Microsoft Windows Local Security Authority Service Remote Buffer Overflow (as described in Microsoft Security Bulletin MS04-011).

Protection

• Initial Rapid Release version June 16, 2005
• Latest Rapid Release version July 27, 2009 revision 085
• Initial Daily Certified version June 16, 2005
• Latest Daily Certified version July 27, 2009 revision 073
• Initial Weekly Certified release date June 22, 2005

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: Medium