The US has already done cyber attwto Russian banking system back in 2016, and even when not a great power, there have been serious claims of the Venezuelan elec

The US has already done cyber attwto Russian banking system back in 2016, and even when not a great power, there have been serious claims of the Venezuelan electric failures being caused by US intervention, beyond that the Snowden leaks showed that the US has set in place mechanisms that could shutdown entire energy grids if they really wanted to