At some point in the night, Ron had made his way to the boys dorm, and turned in. He barely glanced at Harry, before drawing his curtains closed, and sleeping. It wasn't long before the rest of the boy's had done that.
Harry laid in bed, pretending to sleep but he was still watching the map. He held out his wand and muttered" Lumos". He held the wand over the map, so far he saw nothing. He just knew or thought he knew Malfoy would be doing something once everyone else was sleeping.