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


Risk Level 1: Very Low

February 4, 2004
February 13, 2007 12:17:02 PM
Systems Affected:

W32.HLLW.Gaobot.JB is a minor variant of W32.HLLW.Gaobot.BF that uses a different file name and is repacked with PECompact. It attempts to spread to network shares that have weak passwords and allows attackers to access an infected computer through an IRC channel.

The worm uses multiple vulnerabilities to spread, including:

When W32.HLLW.Gaobot.JB attempts to run on Windows 95/98/Me, it causes the error:
Error Starting Program
The PSAPI.DLL file is linked to missing export NTDLL.DLL:NtCreateProfile

Antivirus Protection Dates

  • Initial Rapid Release version February 5, 2004
  • Latest Rapid Release version September 28, 2010 revision 054
  • Initial Daily Certified version February 5, 2004
  • Latest Daily Certified version September 28, 2010 revision 036
  • Initial Weekly Certified release date February 11, 2004
Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.
Writeup By: Paul Mangan

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