W32.Mytob.EF@mm

W32.Mytob.EF@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 LSASS Buffer Overrun Vulnerability (as described in Microsoft Security Bulletin MS04-011) and the Microsoft Windows DCOM RPC Interface Buffer Overrun Vulnerability (as described in Microsoft Security Bulletin MS03-026).

Protection

• Initial Rapid Release version June 12, 2005
• Latest Rapid Release version June 12, 2005
• Initial Daily Certified version June 12, 2005
• Latest Daily Certified version June 12, 2005
• Initial Weekly Certified release date June 15, 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: High