need help finding this thriller/horror movie

so i need help finding this horror movie, i believe it’s from 2000’s and is about a family and they’re stuck in a cabin in the winter and there’s wolves or something attacking them, might be wrong but i remember a little boy hiding in a room or bathroom or something and he comes out to blood and everything, i just can’t remember what its called but i do remember the movie poster having a frozen lake and a pier and i also think the boy is standing on the pier?? please help me