See http://esec-lab.sogeti.com/posts/2016/06/07/the-story-of-yet-another-ransomfailware.html or http://esec-pentest.sogeti.com/posts/2016/06/07/the-story-of-yet-another-ransomfailware.html
Use at you own risks!
ransomware-xtbl-decrypt-tool is released under the BSD 3-Clause License.