A controlled experiment by cyber security researchers shows that the vast majority of attacks come from the United States. The number two source of attacks was China with over 3,500 attacks, and Russia was number three with over 2,500. The fact that many attacks originate from the US probably means that other countries are trying to retaliate with attacks of their own. And we were already a huge target. Just look at Bloomberg’s chart: US-based attacks equalled or exceeded its two greatest cyber adversaries combined.”]
Source: https://gizmodo.com/study-shows-most-serious-cyber-attacks-are-coming-from-1638530345