Stupid Ransomware is a family of ransomware infections that are typically utilized by less skilled developers and many utilize themes based on movies, pop-culture, or pretend to be law enforcement. Michael Gillespie has created a decryptor called StupidDecryptor that contains the decryption keys for all known StupidRansomware variants. The currently supported variants are the ones that append the following extensions to the names of encrypted files.Instructions on how to use the decryptor are below. If you need help using this decryptor, feel free to leave a comment.
Source: https://www.bleepingcomputer.com/ransomware/decryptor/how-to-decrypt-the-stupid-ransomware-family-with-stupiddecrypter/