Invisible Empire is another encrypt ransomware that locks your files and shows you a decrypt instruction to lead you to buy the decryption key. Usually the instruction looks like e a decrypting helper, and it looks like an item that will help you decode the files which are locked. In generally, users will simply encrypt their files with passwords and they want to protect their data or secrets. But the truth is far from it and Invisible Empire generally caused encryption without consent of users and require a large amount of money to exchange for the decryption keys. In this way, i bet you have guess right that Invisible Empire is a ransomware.