What do you mean "attack"? Is there some specific harm being done that you want to protect against? Breach of defenses isn't itself an attack. A foreign agent inside your castle isn't an attacker until they start stabbing people, right?

I'm not personally worried about what Chinese and Russian hackers know about me, because none of that information is particularly useful for taking valuables from me. I am curious what your experience is, just so I can understand the context of your concern.