W32.Netsky.U@mm

W32.Netsky.U@mm is a mass-mailing worm and a variant of W32.Netsky.S@mm. This worm also contains backdoor functionality and may perform a Denial of Service (DoS) attack against predetermined Web sites.

The Subject and Attachment name vary. The attachment has a .pif file extension.

Antivirus Protection Dates

• Initial Rapid Release version April 8, 2004
• Latest Rapid Release version August 20, 2008 revision 017
• Initial Daily Certified version April 8, 2004
• Latest Daily Certified version January 20, 2009 revision 048
• Initial Weekly Certified release date April 14, 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: 0 - 2
• Geographical Distribution: Low
• Threat Containment: Easy
• Removal: Moderate

Damage

• Damage Level: Low

Distribution

• Distribution Level: High