W32.Lofni.Worm

W32.Lofni.Worm is a worm that attempts to spread itself through file-sharing networks. It also attempts to mass mail itself to all the contacts in the Windows Address Book. The email will have a variable subject and attachment name. The attachment will have a .exe or .scr file extension.

The worm uses an internal SMTP client engine. In addition, W32.Lofni.Worm is a network-aware worm. It is a Visual Basic application that is compiled to native code and is packed with UPX v1.23.

Definitions dated prior to July 25, 2003 detect this as W32.Lohack.B.Worm.

Protection

• Initial Rapid Release version July 14, 2003
• Latest Rapid Release version March 13, 2008 revision 036
• Initial Daily Certified version July 14, 2003
• Latest Daily Certified version March 14, 2008 revision 003
• Initial Weekly Certified release date July 16, 2003

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