1. Symantec/
  2. Security Response/
  3. Backdoor.Beasty.H


Risk Level 1: Very Low

August 13, 2003
February 13, 2007 12:06:11 PM
Also Known As:
BackDoor-AMQ [McAfee]
Trojan Horse
Systems Affected:

Backdoor.Beasty.H is a Backdoor Trojan Horse that gives its creator unauthorized access to your computer.

Possible signs of infection include the existence of a file that has the .blf extension in the system folder, or an Internet Explorer process (IExplore.exe) that runs even when you are not browsing the Web.

Backdoor.Beasty.H, like all Beasty variants, is generated with a kit that allows its creator to configure details, such as port numbers and filenames, so the behavior of the Trojan may be slightly different than the information in this writeup.

Antivirus Protection Dates

  • Initial Rapid Release version August 14, 2003
  • Latest Rapid Release version August 8, 2016 revision 023
  • Initial Daily Certified version August 14, 2003 revision 003
  • Latest Daily Certified version August 9, 2016 revision 001
  • Initial Weekly Certified release date August 20, 2003
Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.
Writeup By: Heather Shannon

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