文件名后缀全部改为.montana,并有勒索，如何清除

Hello.
If you are reading this, it means your data is encrypted and your private sensivitive information was stolen!
Read carefully the whole instructions to avoid problems with your data.
You have to contact us immediately to resolve this issue and make a deal!

!!!WARNING!!!

DO NOT modify, rename, copy or move any file. You can DAMAGE them and decryption will be impossible!
DO NOT use any third-party or public decryption software, it also may DAMAGE files.

There is ONLY ONE possible way to get back your files.
Do not waste your time, contact us and pay for special DECRYPTION TOOL. The tool is all you need.
For your guarantee we can decrypt 2 of your text or image files for free, as a proof that it works.

Your network was fully COMPROMISED! We can discuss how to secure it as a bonus.
The data that we gathered could be published in MASS MEDIA for BREAKING NEWS!
If we make a deal everything would be kept in secret and all your data will be restored.
I could make them public them if you decide not to pay.

您好，这种勒索病毒目前无法解密