W32.Petch

W32.Petch is a downloaded file that disables firewall and security software. This worm also deletes critical system files and changes the Internet Explorer home page to a pornographic page.

A Web site responsible for distributing this threat is no longer available.

This threat is UPX-packed and written in the Delphi programming language.

Virus definitions dated prior to October 31, 2003 may detect this threat as IRC.Trojan.Fgt.

Protection

• Initial Rapid Release version October 27, 2003
• Latest Rapid Release version March 3, 2008 revision 035
• Initial Daily Certified version October 27, 2003
• Latest Daily Certified version March 3, 2008 revision 037
• Initial Weekly Certified release date October 29, 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: Medium
• Threat Containment: Easy
• Removal: Difficult

Damage

• Damage Level: High

Distribution

• Distribution Level: Low