W32.Esbot.B

W32.Esbot.B is a worm that spreads by exploiting the Microsoft Windows Plug and Play Buffer Overflow Vulnerability (described in Microsoft Security Bulletin MS05-039).

Note: While computers running Windows 95/98/Me/NT4/XP operating systems cannot be infected remotely, it is possible they could be infected if the threat is executed locally (although this is an unlikely occurrence). Vulnerable Windows 2000 computers could then be infected by the compromised computer.



August 23, 2005:

• Added alias information.
• Minor update to registry removal instructions.
• August 18, 2005: Updated with information about the removal tool.

Protection

• Initial Rapid Release version August 17, 2005
• Latest Rapid Release version August 17, 2005
• Initial Daily Certified version August 17, 2005
• Latest Daily Certified version August 17, 2005
• Initial Weekly Certified release date August 17, 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: 50 - 999
• Number of Sites: More than 10
• Geographical Distribution: Low
• Threat Containment: Easy
• Removal: Moderate

Damage

• Damage Level: Medium

Distribution

• Distribution Level: Medium