Hacking group H4LT have taken up the responsibility.
The internet has been paying attention to LizardSquad and Anonymous recently, overlooking and partially ignoring the other hacking groups that are out there. One such group that you may know of is H4LT. They leaked the Xbox One Software Development Kit onto the internet and tweeted screenshots and the like directly to Xbox themselves in a bid to draw attention to the fact.
When asked if there was a point to leaking the SDK, they stated: “We leaked it to the community because if something is shared then.. progress is achieved faster than alone”…” Something kept between us will not achieve anything. Share it with the community = creativity and research. Shared is how it should be.”
“The SDK will basically allow the community to reverse and open doors towards homebrew applications being present on the Xbox One.” They also said that they do have plans for further software leaks in the future, though didn’t give specifics on the matter.