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


July 28, 2002
February 13, 2007 11:49:13 AM
Also Known As:
Worm.P2P.Sytro [AVP], W32/Qtint.worm[McAfee], Win32/Sytro.Worm[CA]
Systems Affected:

W32.HLLW.Electron is a worm that spreads across KaZaA or Morpheus file-sharing, peer-to-peer networks. The worm disguises itself as a movie, a game, or a software file to trick KaZaA and Morpheus users into downloading the program and opening it.

Several variants are detected as W32.HLLW.Electron. All variants are written in the Borland Delphi programming language. Some of the variants are compressed with UPX.

Antivirus Protection Dates

  • Initial Rapid Release version July 29, 2002
  • Latest Rapid Release version March 2, 2018 revision 023
  • Initial Daily Certified version July 29, 2002
  • Latest Daily Certified version March 3, 2018 revision 001
  • Initial Weekly Certified release date July 31, 2002
Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.
Writeup By: Yana Liu

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STAR Antimalware Protection Technologies
2016 Internet Security Threat Report, Volume 21
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