Trojan.Hexem

Risk Level 1: Very Low

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Discovered:: February 9, 2005
Updated:: February 13, 2007 12:33:18 PM
Type:: Trojan Horse
Systems Affected:: Windows 2000, Windows 95, Windows 98, Windows Me, Windows NT, Windows Server 2003, Windows XP

Trojan.Hexem is a malicious PNG file that exploits the Microsoft MSN Messenger/Windows Messenger PNG Buffer Overflow Vulnerability (described in Microsoft Security Bulletin MS02-066). This causes a remote executable to be downloaded and executed on the compromised computer.

Antivirus Protection Dates

Initial Rapid Release version February 9, 2005
Latest Rapid Release version February 26, 2012 revision 025
Initial Daily Certified version February 9, 2005 revision 036
Latest Daily Certified version February 27, 2012 revision 002
Initial Weekly Certified release date February 9, 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: Low

Distribution

Distribution Level: Low

Writeup By: Rodney Andres

Technical Details

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Internet Security Threat Report, Volume 16