Disruption of the supply of electricity is no trivial matter. It is enough to recall the events in Israel in late 2015 resulting from natural causes, and not a cyber attack
The Cyber Attack on the Ukrainian Electrical Infrastructure: Another Warning
For some time, security experts have warned that critical services – for example, electricity and water supplies – can be attacked through cyberspace. The assumption is that such action requires sophisticated capabilities in cyber intelligence, technology, and operations, and possession of such capabilities is usually attributed to countries that have invested heavily in their development. Until now, even if in possession of such capabilities, most countries have shown restraint in using cyber tools to materially disrupt essential services and critical infrastructure in enemy countries. Events in Ukraine, however, question whether this assumption of restraint is still valid.
