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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.

Protection

  • Initial Rapid Release version November 6, 2004
  • Latest Rapid Release version March 3, 2008 revision 035
  • Initial Daily Certified version November 6, 2004
  • Latest Daily Certified version March 3, 2008 revision 037
  • Initial Weekly Certified release date November 8, 2004

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: John Park
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