Might be me, but I'd be surprised if they hadn't. They hacked so many countries including China[1], Mexico[1], Belgium[1], Syria[3], Iran[4], etc. (after saying that a digital attack is an act of war[2]). I don't remember each and every leak and I don't feel like looking up everything, but they seem to have targeted loads of people in various countries. I doubt North Korea (which is not even an ally) is the exception.
[1] https://en.wikipedia.org/wiki/Tailored_Access_Operations#Kno...
[2] https://en.wikipedia.org/wiki/Cyberwarfare_in_the_United_Sta...
[3] http://www.theverge.com/2014/8/13/5998237/nsa-responsible-fo...
[4] Stuxnet http://rt.com/news/snowden-nsa-interview-surveillance-831/