BRICS called, they wanna give back some funny money they've been hoarding. I think you might want to send it to the folks in the UMBRAGE group, see what they have to (not) say about it ..
https://en.wikipedia.org/wiki/Vault_7#UMBRAGE
Besides which, attacking a rival countrys' infrastructure is an act of war (NS2, etc.) so making the Poles hate Russia even more - eventually resulting in public support of Polands' occupation of Western Ukraine attaining critical populist mass .. seems like an easy outcome of this attack.
What does Russia gain from stopping a few trains in Poland? Nothing. What does the CIA gain from making Poles hate Russians even more? A heck of a lot. Especially given todays newsroll explaining the Zelensky doesn't have its allies support for the invasion of Russia ..
>de la décennie
Nope, that's still the USA for a significant portion of the world.