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  3. W32.HLLW.Gaobot.DK

W32.HLLW.Gaobot.DK

Risk Level 2: Low

Discovered:
December 5, 2003
Updated:
February 13, 2007 12:14:52 PM
Also Known As:
W32.HLLW.Gaobot.gen, W32/Gaobot.worm.gen [McAfee], Backdoor.Agobot.3.gen [Kaspers
Type:
Worm
Systems Affected:
Windows 2000, Windows 95, Windows 98, Windows Me, Windows NT, Windows Server 2003, Windows XP

W32.HLLW.Gaobot.DK is a worm that uses several exploits to spread. It acts as a spam proxy, using the infected computer to send large numbers of unsolicited emails using its own SMTP engine. This worm also opens a backdoor to a predetermined IRC channel.

This worm propagates using multiple vulnerabilities, including:

W32.HLLW.Gaobot.DK gives an attacker complete access to your computer. By default, the worm listens on TCP port 63809 and notifies the attacker through IRC. The worm attempts to terminate various security products and system-monitoring tools.


Note: Virus definitions dated prior to December 9th, 2003 may detect this threat as W32.HLLW.Gaobot.gen.


Antivirus Protection Dates

  • Initial Rapid Release version December 8, 2003
  • Latest Rapid Release version September 28, 2010 revision 054
  • Initial Daily Certified version December 8, 2003
  • Latest Daily Certified version September 28, 2010 revision 036
  • Initial Weekly Certified release date December 10, 2003
Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.

Threat Assessment

Wild

  • Wild Level: Low
  • Number of Infections: 0 - 49
  • Number of Sites: 0 - 2
  • Geographical Distribution: Low
  • Threat Containment: Easy
  • Removal: Moderate

Damage

  • Damage Level: Medium

Distribution

  • Distribution Level: Medium
Writeup By: Fergal Ladley

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