W32.Bobax.Z@mm

W32.Bobax.Z@mm is a mass-mailing worm that lowers security settings and allows a compromised computer to be used as a covert proxy. The worm also sends an email to addresses gathered from the compromised computer.

The worm propagates by exploiting the Microsoft Windows LSASS Buffer Overrun Vulnerability (described in Microsoft Security Bulletin MS04-011).

Note: W32.Bobax.Z@mm is a minor variant of W32.Bobax.N.

Protection

• Initial Rapid Release version June 3, 2005
• Latest Rapid Release version August 20, 2008 revision 017
• Initial Daily Certified version June 3, 2005
• Latest Daily Certified version January 20, 2009 revision 048
• Initial Weekly Certified release date June 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