W32.Kassbot.B

Risk Level 2: Low

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Discovered: May 31, 2005

Updated: February 13, 2007 12:39:28 PM

Also Known As: Win32.Wadnock.{A-D} [Computer , Backdoor.Win32.Nanspy.{a-d} [K, W32/Generic.Delphi.b [McAfee], W32/Nanpy-{A-C} [Sophos], WORM_NANPY.A [Trend Micro]

Type: Worm

Systems Affected: Windows 2000, Windows 95, Windows 98, Windows Me, Windows NT, Windows Server 2003, Windows XP

W32.Kassbot.B is a network-aware worm that propagates by exploiting the Microsoft Windows DCOM RPC Interface Buffer Overrun Vulnerability (described in Microsoft Security Bulletin MS03-026).

Protection

Initial Rapid Release version May 31, 2005
Latest Rapid Release version August 19, 2009 revision 035
Initial Daily Certified version May 31, 2005
Latest Daily Certified version August 19, 2009 revision 032
Initial Weekly Certified release date May 31, 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

Writeup By: Takayoshi Nakayama

Technical Details

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