The FireEye/Fox-IT Decryptolocker website (decryptcryptolocker.com) posted this comment shortly before closing.
FireEye Blog: Your Locker of Information for CryptoLocker Decryption
In August 2014, we launched our website to help the victims of the CryptoLocker malware. We are happy to have helped more than five thousand individuals and small businesses. CryptoLocker, unfortunately, has inspired criminals all over the world. We have seen more than 20 copycat ransomware attacks since the original CryptoLocker, some of which use the same name, modus operandi and layout as the original CryptoLocker. We believe that our Decryptolocker site has served its purpose, and we have decommissioned it given that the threat landscape has evolved.
FireEye is no longer providing decryption solutions for CryptoLocker. If your computer has recently been infected with ransomware, chances are that the infection has been caused by one of the many copycat attacks that use the same or similar name and method of operation. Since these new ransomware variants use different encryption keys, we have discontinued the DecryptCryptoLocker website and its associated decryption service.