W32.Linkbot.A

Risk Level 1: Very Low

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Discovered:: November 5, 2004
Updated:: February 13, 2007 12:29:36 PM
Also Known As:: Backdoor.Win32.Rbot.dc [Kasper
Type:: Worm
Systems Affected:: Windows 2000, Windows 95, Windows 98, Windows Me, Windows NT, Windows Server 2003, Windows XP

W32.Linkbot.A is a worm that exploits the Microsoft Windows LSASS Buffer Overrun Vulnerability (described in Microsoft Security Bulletin MS04-11) to propagate. It also creates an IRC backdoor and attempts to install adware on the infected computer.

Antivirus Protection Dates

Initial Rapid Release version November 6, 2004
Latest Rapid Release version September 28, 2010 revision 054
Initial Daily Certified version November 6, 2004
Latest Daily Certified version September 28, 2010 revision 036
Initial Weekly Certified release date November 8, 2004

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: John Park

Technical Details

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Internet Security Threat Report, Volume 16