Troj/Briss-B is a Trojan that installs software on a computer without the user's consent.
Troj/Briss-B arrives as an XPI (Cross Platform Installer) ZIP file named IST_NETSCAPE.XPI.ZIP. The ZIP file contains an EXE file named ISTINSTALL_NETSCAPE.EXE and a JavaScript file named INSTALL.JS.
The Trojan exploits a security hole in unpatched versions of Mozilla browsers to run the executable file.
The JavaScript file INSTALL.JS is automatically run by the browser. The file copies the EXE file to a Temporary folder and then runs it.
The EXE file is detected as Troj/Small-GL.