W32.Linkbot.M

Risk Level 1: Very Low

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Discovered:: May 21, 2005
Updated:: May 21, 2005 7:59:07 AM
Also Known As:: W32/Poebot-KF [Sophos], W32/Poebot-KO [Sophos], W32/Poebot-LR [Sophos], W32/Poebot-LQ [Sophos], W32/Poebot-MR [Sophos], W32/Poebot-MS [Sophos], W32/Poebot-MV [Sophos]
Type:: Worm
Infection Length:: 90,624 bytes
Systems Affected:: Windows 98, Windows 95, Windows XP, Windows Me, Windows NT, Windows 2000
CVE References:: CVE-2003-0533

W32.Linkbot.M is a worm that exploits the Microsoft Windows LSASS Buffer Overrun Vulnerability (BID 10108) in order to propagate. It also creates a back door on the compromised computer.

Antivirus Protection Dates

Initial Rapid Release version May 21, 2005
Latest Rapid Release version May 12, 2012 revision 018
Initial Daily Certified version May 21, 2005
Latest Daily Certified version May 13, 2012 revision 007
Initial Weekly Certified release date May 24, 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
Payload: Opens a back door on the compromised computer.

Distribution

Distribution Level: Medium
Ports: Connects on TCP port 6667 and 10324. Listens on TCP port 113.
Target of Infection: Computers vulnerable to remotely exploitable vulnerabilities.

Writeup By: Hiroshi Shinotsuka

Technical Details

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Internet Security Threat Report, Volume 16