Victims of Ouroboros Ransomware can get their files decrypted for free with the help of a security researcher and a decryptor that has been made for different variants. The researcher and ransomware expert BloodDolly announced that a method has been discovered that could allow victims to obtain their file’s decryption key. To receive help, users can create a zip file containing encrypted and unencrypted versions and share it on a file sharing service like Sendspace or WeTransfer. These files should not have any private or confidential information.
Source: https://www.bleepingcomputer.com/news/security/free-ouroboros-ransomware-zeropadypt-nextgen-decryption-available/