1. Symantec/
  2. Security Response/
  3. Backdoor.Sysbug


Risk Level 1: Very Low

November 25, 2003
February 13, 2007 12:14:17 PM
Also Known As:
BackDoor-CAG [McAfee], Troj/Sysbug-A [Sophos], TROJ_SYSBUG.A [Trend]
Trojan Horse
Systems Affected:

Backdoor.Sysbug is a Backdoor Trojan Horse that opens TCP port 5555 and waits for commands from the Trojan's author. It also steals information about an infected computer's configuration.

The Trojan is distributed in an email with the following characteristics:

From: james2003@hotmail.com
Subject: Re[2]: Mary
Attachment: Private.zip

Antivirus Protection Dates

  • Initial Rapid Release version November 25, 2003
  • Latest Rapid Release version September 28, 2010 revision 054
  • Initial Daily Certified version November 25, 2003
  • Latest Daily Certified version September 28, 2010 revision 036
  • Initial Weekly Certified release date November 26, 2003
Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.
Writeup By: Kaoru Hayashi

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2016 Internet Security Threat Report, Volume 21
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