That is a variant of the STOP/Djvu ransomware. STOPDecrypter can't recover your files yet, however it can still be used to get information that may be able to help the creator of STOPDecrypter figure out your decryption key. Here's a link to instructions on how to get this information with STOPDecrypter: https://kb.gt500.org/stopdecrypter   While most ransomwares will automatically delete themselves after they finish encrypting files, some are now leaving behind components on comp