EXACTLY:
A big cyberattack requires computer expertise. "North Korea doesn't have the sophistication to conduct an attack like this," says Street.

I had my doubts about this too. I remember a Good Morning America series that Diane Sawyer did last year, I believe. She commented that the internet is confined to a few of the most elite (in govt?) and Kim Jong being the main one. So unless he was willing to open his gate to permit such an attack, I was not so sure it was generated from NK.

Thanks for this clip!