W32.Dasher.B

Risk Level 2: Low

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Discovered:: December 16, 2005
Updated:: February 13, 2007 12:50:04 PM
Also Known As:: Dasher.B [F-Secure]
Type:: Worm
Systems Affected:: Windows 2000, Windows 95, Windows 98, Windows Me, Windows NT, Windows Server 2003, Windows XP

W32.Dasher.B is a worm that exploits the Microsoft Windows Distributed Transaction Coordinator Remote Exploit (as described in Microsoft Security Bulletin MS05-051) on TCP port 1025.

Antivirus Protection Dates

Initial Rapid Release version December 16, 2005
Latest Rapid Release version September 28, 2010 revision 054
Initial Daily Certified version December 16, 2005
Latest Daily Certified version September 28, 2010 revision 036
Initial Weekly Certified release date December 21, 2005

Click 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: Easy

Damage

Damage Level: Medium

Distribution

Distribution Level: Medium

Writeup By: Yana Liu

Technical Details

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Internet Security Threat Report, Volume 16