Wannacry decryptors available now
French security researchers have been successful somewhat as they have developed a decryptor. It cannot be actually called as a decryptor, as it calculates the key required to decrypt the files from the memory itself(No brute force).Adrien Guinet says that this tool works for all OSes except Windows 10. However there is a catch-you must not have restarted your PC after the files have been decrypted as the tool finds the key from the memory itself.
There are currently 2 tools available to decrypt the files, WannaKey and WanaKiwi. Both use similar techniques to decrypt the files.