W32.Mytob.FX@mm

W32.Mytob.FX@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 23, 2005
• Latest Rapid Release version August 20, 2008 revision 017
• Initial Daily Certified version June 23, 2005
• Latest Daily Certified version August 20, 2008 revision 016
• Initial Weekly Certified release date June 29, 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: Moderate

Damage

• Damage Level: Medium

Distribution

• Distribution Level: High