Don't even need that. Just utilize one of the numerous vulnerabilities before it's patched.
Microsoft Windows‘ unstoppable telemetry is another really important note!
Also somehow every experiment that tries to free us from this spyware (e.g. Munich Officials tried to use Linux) gets overpowered with someone throwing money at politicians who immediately change back everything to Windows...
What? So because US govt't systems run (or ran) Kaspersky (or TrendMicro) that means the US is (was) controlled, technically by Russia or Japan? Huh!
The US in a unique position, though. Windows and OSX are operating systems; they have complete control of everything else running in the systems they run on. Google has view of the world's web navigation, email authentication, as well as complete control over a grand portion of the world's phones (most of the other portion is controlled by Apple, also a US company), including knowledge of phone calls made between people, and their location at all times. Facebook also has great knowledge of how all people are interrelated.
There's probably lots I'm missing, but the point is that most of the world's cyberspace (a useful word apparently) is controlled by the US. If we translate that to cyberwarfare, that means that the US practically has ALL the guns. A couple guns from other nations are not going to make a difference in this space.