W32.Kelvir.R

Risk Level 2: Low

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Discovered:: April 12, 2005
Updated:: February 13, 2007 12:36:53 PM
Also Known As:: IM-Worm.Win32.Kelvir.q [Kasper, W32/Kelvir.worm.gen [McAfee], W32/Kelvir-Q [Sophos], WORM_KELVIR.AE [Trend Micro]
Type:: Worm
Systems Affected:: Windows 2000, Windows 95, Windows 98, Windows Me, Windows NT, Windows Server 2003, Windows XP

W32.Kelvir.R is a worm that spreads through MSN Messenger and drops a variant of W32.Spybot.Worm.

It also spreads by exploiting the Microsoft Windows DCOM RPC Interface Buffer Overrun Vulnerability (described in Microsoft Security Bulletin MS03-026), the Microsoft Windows Local Security Authority Service Remote Buffer Overflow (as described in Microsoft Security Bulletin MS04-011), and the vulnerabilities in the Microsoft SQL Server 2000 or MSDE 2000 audit (as described in Microsoft Security Bulletin MS02-061) using UDP port 1434.

Antivirus Protection Dates

Initial Rapid Release version April 13, 2005
Latest Rapid Release version September 28, 2010 revision 054
Initial Daily Certified version April 13, 2005
Latest Daily Certified version September 28, 2010 revision 036
Initial Weekly Certified release date April 13, 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: Moderate

Damage

Damage Level: Medium

Distribution

Distribution Level: Medium

Writeup By: Hyun Choi

Technical Details

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Internet Security Threat Report, Volume 16