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


Risk Level 2: Low

October 22, 2002
February 13, 2007 11:56:04 AM
Also Known As:
W32/Gaobot.worm [McAfee], WORM_GAOBOT
Systems Affected:

W32.HLLW.Gaobot is a worm that copies itself as %system%\Sysldr32.exe.

It then connects to an IRC server and listens for commands. By default, the worm will connect on ports 6,667 and 9,900. Some of the commands that it supports include commands to spread itself, using popular file sharing programs such as Kazaa, Bearshare, and Grokster. It shares itself as some of the following file names:
  • Kylie Minogue is very horny atm - XXX.exe
  • Cameron Diaz's webcam - cracked access - no cost - XXX.exe
  • Hoyle Card Games 2003 crack (all versions).exe
  • Warcraft 3 - Cable Modem Playfix.exe
  • Delta Force Black Hawk Down - Item Hack.exe

The worm also attempts to spread to all computers on the network, using a utility that connects to a remote computer on port 445, it copies the Woinggg.exe file across the network, and then executes it.

Antivirus Protection Dates

  • Initial Rapid Release version October 22, 2002
  • Latest Rapid Release version January 15, 2018 revision 020
  • Initial Daily Certified version October 22, 2002
  • Latest Daily Certified version January 15, 2018 revision 024
  • Initial Weekly Certified release date October 23, 2002
Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.
Writeup By: Douglas Knowles

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