W32.Wallon.A@mm

W32.Wallon.A@mm is a mass-mailing worm that sends email messages containing a hyperlink to download the worm body from certain URLs. It also harvests the email addresses on the infected machine.

The worm exploits the following vulnerabilities: Microsoft Security Bulletin MS04-004 and Microsoft Security Bulletin MS04-013

This threat is written in Delphi and packed with ASPack.

Protection

• Initial Rapid Release version May 12, 2004
• Latest Rapid Release version February 25, 2009 revision 048
• Initial Daily Certified version May 12, 2004
• Latest Daily Certified version February 25, 2009 revision 056
• Initial Weekly Certified release date May 12, 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: Low

Distribution

• Distribution Level: Medium