What the meaning of "US counter" in hacking?

[shaharhada]

One of the biggest US counter moves to date came in August when the Treasury Department sanctioned a cryptocurrency "mixing" service known as Tornado Cash that allegedly laundered $355 miilion for North Korean hackers.
From: https://edition.cnn.com/2023/04/09/politics/north-korean-crypto-hackers-crackdown/index.html

What is the meaning of US counter expression?
What is the whole above sentence say?

 

[COLGeek]

Took action to oppose/stop what hackers did.

 

[DSzymborski]

It might be clearer if you realize that counter goes with moves, not US. A counter move is widely used across many topics to indicate something you do in opposition to something someone else does, especially in the context of strategy.

 

[falcon291]

It is not "US counter" but "counter moves" you should be asking. United States government took action against North Korean hackers.