Researchers from the security firm Tesorion have created a decryptor that works on Nemty Ransomware versions 1.6 and 1.4, with 1.5 coming soon. The decryptor works on only a limited amount of file extensions, but the researchers are expanding support for more file types every day. The only files it was not able to decrypt were non-standard file formats such as Office documents, videos, and images. Users can then select the folder or drive that they wish to decrypt and begin recovering their files.
Source: https://www.bleepingcomputer.com/news/security/nemty-ransomware-decryptor-released-recover-files-for-free/