Trojan.Hexem

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.

Protection

• Initial Rapid Release version February 9, 2005
• Latest Rapid Release version June 22, 2009 revision 066
• Initial Daily Certified version February 9, 2005 revision 036
• Latest Daily Certified version June 19, 2009 revision 051
• Initial Weekly Certified release date February 9, 2005

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: Easy

Damage

• Damage Level: Low

Distribution

• Distribution Level: Low