W32.Korgo.F

W32.Korgo.F is a minor variant of W32.Korgo.E. It is a worm that 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 ports 113, 3067, and other random ports.

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Notes:

• Rapid Release virus definitions version 6/2/2004 rev 17 (sequence number 31552) or greater detect this threat specifically as W32.Korgo.F.
• Virus definitions version 60408w (extended version 4/8/2004 rev. 23) detect this threat as Bloodhound.Packed.

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Symantec Security Response has developed a removal tool to clean infections of W32.Korgo.F.

Protection

• Initial Rapid Release version June 2, 2004
• Latest Rapid Release version August 20, 2008 revision 017
• Initial Daily Certified version June 2, 2004
• Latest Daily Certified version August 20, 2008 revision 016
• Initial Weekly Certified release date June 2, 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: 50 - 999
• Number of Sites: More than 10
• Geographical Distribution: Low
• Threat Containment: Easy
• Removal: Moderate

Damage

• Damage Level: Medium

Distribution

• Distribution Level: Medium