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Risk Level 2: Low

September 28, 1999
February 13, 2007 11:51:32 AM
Trojan Horse

The DonaldD.Trojan is similar to the BackOrifice.Trojan. When installed in Microsoft Windows, this backdoor Trojan horse program enables others to gain full access to the system through a network connection. It consists of two parts: a server application and a client application. Both applications can run under Windows 95, 98, and NT 4.0. The client application, running on one computer, may be used to monitor and control a second computer running the server application.

The port number through which the client controls the server is configurable. However, as long as the port is blocked by a firewall, this Trojan horse will not be able to infiltrate the server. It does not matter whether the TCP or SPX protocol is implemented. There have not been any reports of this program being able to break through a firewall.

Antivirus Protection Dates

  • Initial Rapid Release version September 28, 1999
  • Latest Rapid Release version June 24, 2014 revision 006
  • Initial Daily Certified version September 28, 1999
  • Latest Daily Certified version May 1, 2013 revision 005
  • Initial Weekly Certified release date pending
Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.

Threat Assessment


  • Wild Level: Low
  • Number of Infections: 0 - 49
  • Number of Sites: 3 - 9
  • Geographical Distribution: Low
  • Threat Containment: Easy
  • Removal: Moderate


  • Damage Level: High


  • Distribution Level: Low
Note: On May 14, 2015, modifications will be made to the threat write-ups to streamline the content. The Threat Assessment section will no longer be published as this section is no longer relevant to today's threat landscape. The Risk Level will continue to be the main threat risk assessment indicator.
Writeup By: Motoaki Yamamura

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