[acdha]

Just to add to this, https://en.wikipedia.org/wiki/Fancy_Bear has links to multiple security companies which have publicly drawn the link to the Russian government.

The list of targets is also convincing: various NATO organizations but also things like the World Anti Doping Agency at the time the Russian Olympic team was being disqualified from everything. You could argue that, say, China might be interested in hacking the US or France but Eastern Europe and WADA really aren’t of interest to most other major powers.