The U.S. Nuclear Power subsector has been hacked. The bad guy(s) in this case are believed to be Russian. The ENERGETIC BEAR campaign has been stealthy and persistent, functioning since 2011. The stealthy nature and low-signy nature of the campaign makes it difficult to determine the composition, sponsorship, or size of the adversary. With the known exception of Ukraine and the BLACKENERGY APT, the. action-on-target “attack” phase so far has been withheld. No operational technology in the. Energy Sector is known to have been compromised.”]
Source: https://www.csoonline.com/article/3207671/global-cyber-reconnaissance-against-the-energy-sector.html