W32.Kobot.B

W32.Kobot.B is a worm that spreads through open network shares, telnet, dameware, realserv, VNC, and niprint. This worm also uses three remotely exploitable Windows vulnerabilities to propagate.

The worm can also function as an email relay and as a proxy for HTTP and SOCKS.

The worm uses multiple vulnerabilities to spread, including:

• The Microsoft Windows LSASS Buffer Overrun Vulnerability (described in Microsoft Security Bulletin MS04-011).
• The DCOM RPC vulnerability (described in Microsoft Security Bulletin MS03-026).
• The Microsoft SQL Server Web Task Stored Procedure Privilege Escalation Vulnerability (described in Microsoft Security Bulletin MS02-061).

Protection

• Initial Rapid Release version January 12, 2005
• Latest Rapid Release version August 20, 2008 revision 017
• Initial Daily Certified version January 12, 2005
• Latest Daily Certified version August 20, 2008 revision 016
• Initial Weekly Certified release date January 12, 2005

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