Hacker group Anonymous declares war on ISIS in response to Paris attacks

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.