Files Encrypted by CTB-Locker!

A client was infected with CTB-Locker encryption malware. All their documents have been encrypted and are inaccessible. A file in each directory contains a link to a website with info to obtain the key to unlock all files. I have heard about these schemes but this is the first time I have experienced it. Info on the internet indicates that the price for the key is about $500 but many did not get access to all files even after paying the ransom. I have replaced the hard drive (separate issue) and restored files from Carbonite, only to find out that they are also encrypted. Carbonite is currently working to restore the backup to a point prior to the infection. I hope they are successful!