Okay I saw this horror movie a few years back that involved Four or five Brothers returning home to visit their mom at her Cabin in the Woods. They come across some kind of alien force field that is invisible but has special properties and decide two keep it quiet. It ends up causing them to have weird thoughts and when they get back to the cabin they all start to cut and maim each other in various ways. It also shows a scene with their mom doing some signing with her hands like she is possessed from an alien force.