Skull on Green

GreenGrimm Uhmmm ... whos the maker of this logo ? Is it copy right ?

fanfly I don't know. I originally found it on wallpapervortex [which I cited as the source]. That was 4 years ago though and when I just googled the image the only result that popped up was for a site called Twitrcover, which I've never heard of. But it looks like they've added a small watermark to it and are claiming copyright.