"Due to interference, we are no longer able to process unlock requests. Goodbye." It's probably easier, as you point out, to have the virus delete its keys and

"Due to interference, we are no longer able to process unlock requests. Goodbye." It's probably easier, as you point out, to have the virus delete its keys and wipe itself out. (And has the added benefit of taking some forensic info with it.) But in a marketing sense, blaming people interfering with your network for the lost data may make you safer, as many victims are likely to prefer you extorting them to the good guys causing data loss by stopping you. Being a criminal is all about customer service.