All Through the House

All Through the House is a 2015 American holiday slasher film written and directed by Todd Nunes and produced by The Readmond Company. It stars Ashley Mary Nunes, Jessica Cameron, and Jennifer Wenger, and follows a masked killer dressed in a Santa Claus costume who terrorizes a neighborhood during the Christmas holiday. The film was shot in Los Angeles, San Francisco, and Lake Arrowhead, California over a period of 21 days.

Synopsis from Wikipedia, CC BY-SA 4.0. Everything below written here.