W32.HLLW.Purol

W32.HLLW.Purol is a worm that attempts to spread through file-sharing networks and to delete certain files from the infected computer.

The worm uses this icon:



to attempt to disguise itself as an ordinary zip file.

W32.HLLW.Purol is written in Microsoft Visual Basic (VB) and compressed with UPX. The VB run-time libraries must be installed for it to execute.

Protection

• Initial Rapid Release version April 11, 2003
• Latest Rapid Release version July 19, 2008 revision 019
• Initial Daily Certified version April 11, 2003
• Latest Daily Certified version January 20, 2009 revision 048
• Initial Weekly Certified release date April 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: Medium

Distribution

• Distribution Level: Medium