1. Symantec/
  2. Security Response/
  3. W32.HLLW.Gaobot.BC


Risk Level 1: Very Low

October 24, 2003
February 13, 2007 12:12:50 PM
Also Known As:
W32/Gaobot.worm.gen [McAfee]
Systems Affected:

W32.HLLW.Gaobot.BC is a variant of W32.HLLW.Gaobot.BB that attempts to spread to network shares that have weak passwords, and allows access to an infected computer through an IRC channel. The worm also attempts to terminate the processes of various antivirus and firewall programs.

The worm uses multiple vulnerabilities to spread, including: W32.HLLW.Gaobot.BC is packed with Petite.

Note: Virus definitions released on October 29, 2003 contained a updated signature for W32.HLLW.Gaobot.BC due to the discovery of a minor variant.

Antivirus Protection Dates

  • Initial Rapid Release version October 24, 2003
  • Latest Rapid Release version October 24, 2003
  • Initial Daily Certified version October 24, 2003
  • Latest Daily Certified version October 24, 2003
  • Initial Weekly Certified release date October 24, 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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