This local web page takes you in turn to a special portal page operated by the crooks. This web server interacts in the background with a hidden service on the Dark Web, the identity of which is never revealed, and allows you to upload your KEY file to begin the payment process:

This local web page takes you in turn to a special portal page operated by the crooks.

This web server interacts in the background with a hidden service on the Dark Web, the identity of which is never revealed, and allows you to upload your KEY file to begin the payment process: