You must have heard about Crytolocker, Crytobit, CTB locker and HeyHolder.
Yes, CoinVault is one of them.
Please continue to read the post, find 2 solutions to get your files back.
CoinVault, like CryptoWall and CrytoLocker, is a file-encrypting ransomware created to blackmail money by encrypting files on the computer. Once you are infected with CoinVault, it begins to scan your files and then encrypt all of them after you log in the windows. After the encryption is finished, a screen requiring $500 USD ransom is displayed and instructs you how to pay the ransom and decrypt the files. It also threatens you that the guarantee recovery is provide within 10 days. That’s to say if you don’t pay for it within 10 days, you will lose your files. The recovering files by paying for the ransom may be just a scan. I think you don’t have to pay for the ransom at first, you can try these 2 solutions to restore your files.