Iranians hacked election results computer in 2020, but were blocked - The Washington Post

Cyber Command cooperation with DHS prevented intruders from muddying results, senior commander tells conference…

https://www.washingtonpost.com/technology/2023/04/24/election-2020-iran-hacking/

Pentagon Puts Cyberwarriors on the Offensive, Increasing the Risk of Conflict - The New York Times

Until now, the Cyber Command has assumed a largely defensive posture, but in the spring the Defense Department opened the door to nearly daily raids on foreign networks, seeking to head off attacks. ....
https://www.nytimes.com/2018/06/17/us/politics/cyber-command-trump.html