United States attempted similar Venezuela-like attack against Iranian power grid back in 2009

''It took a country-wide power outage in Venezuela, whispers of a cyberattack, and smug tweets from US officials to make me suddenly recall the cloak-and-dagger story of a close Iranian-American friend nine years ago.''

https://medium.com/@sharminen/us-officials-offered-my-friend-cash-to-take-down-tehrans-power-grid-628435bc61f8