If you don’t want to write ‘country’ because it isn’t fancy enough, you can say ‘state level actor’ or ‘government actor’.
I realise this is a stupid nitpick but this is a hill I am willing to die on.
[1] lots of people in the national security sphere in the US like to use the term ‘nation state’ but they also use lots of stupid terms that don’t seem so much into everyday language. I do notice some media outlets or government sources outside of the US using alternative terms like the ones suggested above.
Russia is actually a fairly good example of a Nation State. It has a largely homogeneous population of Russian speaking Rus people, and the minorities mostly live in autonomous regions that were created to be run by the various ethnic minorities in Russia. There's even a Jewish autonomous region in Russia. Russia is pretty solidly in the Nation State category.
Meanwhile what you are talking about is a country: a sovereign legal entity which actually exists.
https://en.wikipedia.org/wiki/Maksim_Yakubets
The burdens of heated economic warfare are falling on private companies, because laws against ransomware can't practically be enforced. If these crimes were taking place entirely within the sphere of a single state, capturing the perpetrators wouldn't be completely impossible as it is now.
Is your company prepared to be raided by a highly trained state-sponsored militia? Would we expect every company to ensure that its facilities can withstand artillery bombardment?