W32.Korgo.Y

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Discovered:: July 8, 2004
Updated:: February 13, 2007 12:08:19 PM
Also Known As:: W32.Poco
Type:: Worm
Systems Affected:: Windows 2000, Windows XP

W32.Korgo.Y is a worm that attempts to propagate by exploiting the Microsoft Windows PCT Buffer Overrun Vulnerability (described in Microsoft Security Bulletin MS04-011) on TCP port 113. Previous Korgo variants used a different vulnerability, the LSASS Buffer Overrun Vulnerability.

Virus definitions dated prior to July 14, 2004 detect this threat as W32.Poco.

Antivirus Protection Dates

Initial Rapid Release version July 9, 2004
Latest Rapid Release version September 28, 2010 revision 054
Initial Daily Certified version July 9, 2004
Latest Daily Certified version September 28, 2010 revision 036
Initial Weekly Certified release date July 13, 2004

Click for a more detailed description of Rapid Release and Daily Certified virus definitions.

Writeup By: Heather Shannon

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Internet Security Threat Report, Volume 16