Zombie Werewolves Attack!Movie

The film is about a small group of friends that are enjoying a party, only to have it crashed by uninvited guests. After barely surviving the werewolf attack, they learn that it has killed most of the people in their town. Now, surrounded by a town turned into werewolves, they face a difficult dilemma. Can they kill the innocent victims of the wolves, now werewolves themselves, to survive?