1. Symantec/
  2. Security Response/
  3. Backdoor.WinShell.50.b


Risk Level 1: Very Low

August 11, 2003
February 13, 2007 12:06:12 PM
Also Known As:
BackDoor-TC (McAfee).
Trojan Horse
Systems Affected:

Backdoor.WinShell.50.b is a server program that allows unauthorized access to an infected computer. This Trojan Horse is a variant of Backdoor.WinShell.50. The Backdoor uses port 39581 to communicate with it client(s). This threat is usually double-packed.

The original Backdoor.WinShell.50, with Trojan.Stealther.B, is associated with the Microsoft DCOM RPC vulnerability exploit.

Antivirus Protection Dates

  • Initial Rapid Release version August 11, 2003
  • Latest Rapid Release version August 8, 2016 revision 023
  • Initial Daily Certified version August 11, 2003
  • Latest Daily Certified version August 9, 2016 revision 001
  • Initial Weekly Certified release date August 11, 2003
Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.
Writeup By: Maryl Magee

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STAR Antimalware Protection Technologies
2016 Internet Security Threat Report, Volume 21
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