Implement Ransomware functionality

[varocarras]

• Implement a command that encrypts all the files on the machine, destroys backups and sends the C2 the private key.

• Add RSA public key to implant

• Find and destroy all backups

• Encrypt all files with 256 AES symmetric key

• Encrypt 256AES key with public key, store it and send it to C2

• Create Message Box display

• Test it on VirtualBox instance