How to remove Sigma ransomware and restore files

Sigma ransomware is a dangerous virus that can encrypt all the personal files on the computer, which means that you can’t open or run them until they are decrypted. Sigma ransomware is a harmful virus that is making the data unreadable. First Sigma infiltrates your system, then starts encrypting procedure with RSA-2048 encryption algorithm. This ransomware adds 4 random characters as an extension to the name of all the encrypted data.