Because it serves their interest to say so, regardless if it's actually true. Russia is a welcome target and it's basically impossible to prove who's reponsible for a hack like this (the korean symbols in the Fancy Bear's website's [1] source code are cute though).
Also, that's how media works these days. One press release to Reuters, and all the newspapers publish the same "facts".
That being said, I think it's fairly plausible that some actor with relations to Russia would publish documents like these.
Also, that's how media works these days. One press release to Reuters, and all the newspapers publish the same "facts".
That being said, I think it's fairly plausible that some actor with relations to Russia would publish documents like these.
[1] http://fancybear.net