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  3. W32.HLLW.Gaobot.gen


Risk Level 2: Low

November 21, 2003
February 13, 2007 12:14:09 PM
Also Known As:
W32/Gaobot.worm.gen [McAfee], Backdoor.Agobot [Kaspersky], Phatbot
Systems Affected:

W32.HLLW.Gaobot.gen is a detection for a large family of worms, which propagate themselves using multiple vulnerabilities including:
Most variants are packed with a run-time packer, such as UPX.

The W32.HLLW.Gaobot.gen removal tool will remove many but not all the variants that are detected as W32.HLLW.Gaobot.gen.

Note: Virus definitions, version 60227t (extended version 2/27/2004 rev. 20) and later, detect the threat known as Phatbot as W32.HLLW.Gaobot.gen.

Antivirus Protection Dates

  • Initial Rapid Release version November 24, 2003
  • Latest Rapid Release version July 20, 2017 revision 023
  • Initial Daily Certified version November 24, 2003 revision 036
  • Latest Daily Certified version July 21, 2017 revision 001
  • Initial Weekly Certified release date November 26, 2003
Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.

Threat Assessment


  • Wild Level: Medium
  • Number of Infections: More than 1000
  • Number of Sites: More than 10
  • Geographical Distribution: Medium
  • Threat Containment: Easy
  • Removal: Moderate


  • Damage Level: Medium


  • Distribution Level: Medium
Writeup By: Heather Shannon

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