Trojan.Xombe

Trojan.Xombe is a Trojan horse that has at least two components: a 4,096 byte downloader and a 27,136 byte Trojan. The downloader component will retrieve the Trojan file from a predetermined Web site.

The download component has been distributed in an unsolicited email, purporting to be a security update for Windows XP, sent by Microsoft.

The email has the following characteristics:

From: windowsupdate@microsoft.com
Subject: Windows XP Service Pack 1 (Express) - Critical Update.
Attachment: winxp_sp1.exe(4,096 KB)

The Trojan is packed with UPX.



To prevent this Trojan from running, outgoing HTTP connections to domain gamemaniacs.org can be blocked.

Protection

• Initial Rapid Release version January 9, 2004
• Latest Rapid Release version June 22, 2009 revision 066
• Initial Daily Certified version January 9, 2004
• Latest Daily Certified version June 19, 2009 revision 051
• Initial Weekly Certified release date January 14, 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: Easy

Damage

• Damage Level: Low

Distribution

• Distribution Level: Medium