Ikr? i usually love cropping backgrounds, but if you're feeling lazy go search whatever you need, add png at the end and you'll find lots of already cut out pictures, like that one :)

It's from the CIA headquarters scenes, you can see it on this still (http://michael-fassbender.com/gallery/displayimage.php?album=17&pid=1879#top_display_media), it wasn't properly featured in the movie though. I agree, very hot outfit :D