W32.Explet.A@mm

W32.Explet.A@mm is a mass-mailing worm that also spreads through network shares and the Kazaa file-sharing network. The worm exploits the Microsoft Windows LSASS Buffer Overrun Vulnerability (described in Microsoft Security Bulletin MS04-011) and the DCOM RPC vulnerability (described in Microsoft Security Bulletin MS03-026) through TCP ports 135 and 445. It may also lower security settings and download remote files.

Protection

• Initial Rapid Release version June 3, 2004
• Latest Rapid Release version February 6, 2010 revision 048
• Initial Daily Certified version June 3, 2004
• Latest Daily Certified version February 7, 2010 revision 001
• Initial Weekly Certified release date June 7, 2004

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: 3 - 9
• Geographical Distribution: Low
• Threat Containment: Easy
• Removal: Moderate

Damage

• Damage Level: Medium

Distribution

• Distribution Level: High