W32.Korgo.O

W32.Korgo.O is a variant of W32.Korgo.I. This worm attempts to propagate by exploiting the Microsoft Windows LSASS Buffer Overrun Vulnerability (described in Microsoft Security Bulletin MS04-011) on TCP port 445. It also listens on TCP Port 3067 and random TCP ports between 2000 and 8191.


Notes:

• Definitions dated prior to June 29, 2004 detect this threat as W32.Korgo.F.
• Symantec Security Response has developed a removal tool to clean the infections of W32.Korgo.O.

Protection

• Initial Rapid Release version June 7, 2004
• Latest Rapid Release version August 20, 2008 revision 017
• Initial Daily Certified version June 7, 2004
• Latest Daily Certified version August 20, 2008 revision 016
• Initial Weekly Certified release date June 9, 2004

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