1. Symantec/
  2. Security Response/
  3. W32.HLLW.Purol


Risk Level 1: Very Low

April 11, 2003
February 13, 2007 11:45:35 AM
Systems Affected:

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.

Antivirus Protection Dates

  • Initial Rapid Release version April 11, 2003
  • Latest Rapid Release version September 28, 2010 revision 054
  • Initial Daily Certified version April 11, 2003
  • Latest Daily Certified version September 28, 2010 revision 036
  • Initial Weekly Certified release date April 16, 2003
Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.
Writeup By: Robert X Wang

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2016 Internet Security Threat Report, Volume 21
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