Trojan.Watsoon.A

Risk Level 1: Very Low

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Discovered:: October 19, 2004
Updated:: February 13, 2007 12:28:51 PM
Also Known As:: Backdoor.Win32.VB.un [Kaspersk, BackDoor-BDN [McAfee]
Type:: Trojan Horse
Systems Affected:: Windows 2000, Windows 95, Windows 98, Windows Me, Windows NT, Windows Server 2003, Windows XP

Trojan.Watsoon.A is a polymorphic Trojan horse that opens a backdoor on a compromised computer. By default is uses TCP port 19381

NOTE:. Definitions prior to 27th October 2004 may detect this threat as W32.Watsoon.A

Antivirus Protection Dates

Initial Rapid Release version October 20, 2004
Latest Rapid Release version February 16, 2012 revision 006
Initial Daily Certified version October 20, 2004
Latest Daily Certified version February 16, 2012 revision 018
Initial Weekly Certified release date October 20, 2004

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: Moderate

Damage

Damage Level: Medium

Distribution

Distribution Level: Low

Writeup By: John Canavan

Technical Details

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Internet Security Threat Report, Volume 16