Database Got hacked
I have oracle 11g database which is running on windows server 2003 R2.The whole server is hacked by the hackers and all my datafiles,cotrolfiles,redologfiles and even all the files on the server is encrypted with AES encryption method.All the files are showing like a zip file and the hackers give the email id with each file.Now i dont have any backup of that database because all the backup file itself on that server and that is also encrypted.
I dont know how to decrypt the files because its my production database.Is there anyone who can help me out on this issue.