W32.Navidad.16896

W32.Navidad.16896 is a mass-mailing worm program that is very similar to W32.Navidad. The worm uses Microsoft Outlook to spread, using MAPI to reply to all Inbox messages that contain a single attachment.

The worm utilizes the existing email subject line and body, and attaches itself as Emanuel.exe.

Protection

• Initial Rapid Release version November 29, 2000
• Latest Rapid Release version March 3, 2008 revision 035
• Initial Daily Certified version November 29, 2000
• Latest Daily Certified version March 3, 2008 revision 037
• Initial Weekly Certified release date pending

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: Moderate
• Removal: Moderate

Damage

• Damage Level: Low

Distribution

• Distribution Level: Medium