Nomoreransom was set up to help anyone in need. They may have the decryption you are looking for. Check the site. Right now they offer Crysis, Marsjoke/Polyglot, Wildfire, Chimera, Coinvault, Teslacrypt, Shade, Rhannoh, Rakhni
http://www.nomoreransome.org/
And you can track ransomware developments on my page Ransomware