@machinecoin - Indeed, I was suspecting that it was  CVE-2018-17144 . At least you found this quickly. Im sure a lot of other coins out there are affected by the same exploit and have not realised it yet. I think it is a little irresponsible from the BTC community to have realeased this info to the public that fast. A lot of altcoins have not had the time to adjust to it properly. I fear we'll see more damage in the coming weeks and months.