Best answer by Caos
What version of Kaspersky and build do you have installed? Please post the ticket(s) number(s) opened and screenshots of them.
In terms of recovering/decrypting the files, this type of virus usually encrypts the files with very high bit keys, and in very rare cases a decryptor can be created, usually due to failure or careless programming of the malware. But in the vast majority it is not possible, at least at the moment.
You can check if the ransomware that attacked you currently has the possibility to be decrypted here: https://id-ransomware.malwarehunterteam.com/index.php?lang=en
You can find information that can help you here: https://www.nomoreransom.org/en/index.html
Also try the utilities offered by Kaspersky: http://support.kaspersky.com/viruses/utility
If you are a Kaspersky user with a valid license, open a support ticket in my Kaspersky account, send them a sample of an encrypted file, and if you have the same file unencrypted.
There is a chance you can recover your files by using the STOPDecrypter decryption tool.