W32.HLLW.Gool

Risk Level 1: Very Low

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Discovered:: February 12, 2003
Updated:: February 13, 2007 11:43:02 AM
Also Known As:: W32/Gool.worm [McAfee], W32/Igloo-15 [Sophos], WORM_GOOL.A [Trend]
Type:: Worm
Systems Affected:: Windows 2000, Windows 95, Windows 98, Windows Me, Windows NT, Windows XP

W32.HLLW.Gool attempts to spread across the KaZaA file-sharing network and through IRC.

W32.HLLW.Gool has backdoor Trojan capabilities that allow a hacker to gain control of the compromised computer. The TCP port that the worm uses to connect to the hacker is 31,337 by default. The port number can be configured by using the server editor component.

This worm attempts to terminate some popular antivirus and security products processes if they are running.

W32.HLLW.Gool is written in the Borland Delphi programming language.

Antivirus Protection Dates

Initial Rapid Release version February 13, 2003
Latest Rapid Release version September 28, 2010 revision 054
Initial Daily Certified version February 13, 2003
Latest Daily Certified version September 28, 2010 revision 036
Initial Weekly Certified release date February 19, 2003

Click 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: Yana Liu

Technical Details

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Internet Security Threat Report, Volume 16