I saw this this movie some 8/9 years ago in Hbo. I believe it was a slasher movie.
It had some college students on a trip to some snowy place. I had a scene where all of them where sitting around a table talking/playing and one girl removed her bra through her t shirt. Then in a later scene a guy and a topless girl kiss or something. During this she picks his pocket and finds someone's photo( her brother I think) and makes some connection to some mystery. Towards the end of the movie the killer comes in truck and the remaining kid runs to a wooden cabin and locks from inside. Then there is some fight.
This is all I remember. Please find the name...

Cabin in the Woods maybe?

I was thinking Cabin Fever but it doesn't add up. I know what Ur talking about though, damn.