Threat Description

Brown Orifice


Category: Malware
Type: Backdoor
Platform: W32
Aliases: Brown Orifice, Backdoor.BrownOrifice


This backdoor is a Java applet that uses a vulnerability in the Netscape's implementation of Java virtual machine.When the user enters a hostile web page with the Netscape browser, the applet starts.Basically the backdoor acts like a file server. When it is active, it allows access to the contents of the victim's hard drive using the http protocol. By default is listens on the port 8080, but this can be configured.The backdoor runs in top of Netscape's implementation of Java virtual machine and it terminates as soon as JVM terminates - usually when the browser is closed.The backdoor does not install anything on the victim machine.F-Secure Anti-Virus detects the class file when it is accessed.To prevent this and similar problems in the future, you can turn off the Java functionality from Netscape's Preferences.


Automatic action

Once detected, the F-Secure security product will automatically disinfect the suspect file by either deleting it or renaming it.

More scanning & removal options

More information on scanning or removal options is available in the documentation for your F-Secure security product on the Downloads section of our Home - Global site.

You may also refer to the Knowledge Base on the F-Secure Community site for more information.

Contact Support

For further assistance, F-Secure customers can request support online via the Request support or the Chat forms on our Home - Global site.

Technical Details:Sami Rautiainen, F-Secure, August 2000


Suspect a file or URL was wrongly detected? Submit a sample to our Labs for analysis

Submit Now

Give And Get Advice

Give advice. Get advice. Share the knowledge on our free discussion forum.

Learn More