From NBC News:

The hacking of dozens of websites worldwide by someone purporting to be connected to the ISIS terror group — including a Montana credit union, an Irish rape crisis center and a local Italian political party — almost certainly has nothing to do with the Islamist militants, law enforcement and security experts said Monday. The FBI and the Royal Canadian Mounted Police said they are investigating the hacks, which placed a picture of the black ISIS flag and the words “hacked by ISIS, we are everywhere” at the top of the targets’ homepages and invoked a Flash audio plugin playing a song in Arabic.