1. Symantec/
  2. Security Response/
  3. W32.Gaobot.UL


Risk Level 2: Low

April 1, 2004
February 13, 2007 12:20:37 PM
Also Known As:
W32/Gaobot.worm.gen.e [McAfee]
Systems Affected:

W32.Gaobot.UL is a variant of W32.HLLW.Gaobot.gen. It attempts to spread through network shares that have weak passwords and allows attackers to access an infected computer through a predetermined IRC channel.

The worm uses multiple vulnerabilities to spread, including:

W32.Gaobot.UL is packed with PE Diminisher.

Antivirus Protection Dates

  • Initial Rapid Release version April 1, 2004
  • Latest Rapid Release version August 8, 2016 revision 023
  • Initial Daily Certified version April 1, 2004
  • Latest Daily Certified version August 9, 2016 revision 001
  • Initial Weekly Certified release date April 1, 2004
Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.
Writeup By: Neal Hindocha

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