W32.Mytob.HL@mm

W32.Mytob.HL@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 also spreads through the network by exploiting the Microsoft Windows Local Security Authority Service Remote Buffer Overflow (as described in Microsoft Security Bulletin MS04-011).

Note: Virus definitions dated prior to August 3, 2005 detect this risk as W32.Mytob@mm.

Protection

• Initial Rapid Release version August 3, 2005
• Latest Rapid Release version July 12, 2008 revision 018
• Initial Daily Certified version August 3, 2005
• Latest Daily Certified version July 12, 2008 revision 019
• Initial Weekly Certified release date August 3, 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