Unfriended (2014)

"Unfriended" is a 2014 Horror movie directed by Sean Goller and starring by Shelley Hennig, Heather Sossaman. While video chatting one night, six high school friends receive a Skype message from a classmate who killed herself exactly one year ago. At first they think it's a prank, but when the girl starts revealing the friends' darkest secrets, they realize they are dealing with something out of this world, something that wants them dead.