The hacker group Anonymous declared war on ISIS via a video posted on its YouTube channel this weekend.
"Expect massive cyber attacks,” a man in a Guy Fawkes mask says in French. “War is declared. Get prepared.
"The French people are stronger than you and will come out of this atrocity even stronger."
Anonymous has a long history of “hacktivism.” The group has, in the past, gone after everything from child pornography sites to the Westboro Baptist Church.
The group later posted a Tweet with a similar message.
https://twitter.com/GroupAnon/status/665956057005559808