"I don't think paralysis [of the electrical grid] is more likely by
cyberattack than by natural disaster. And frankly the number-one
threat experianced to date by the US electrical grid is squirrels." - John C. Inglis, Former Deputy Director, National Security Agency 2015.07.09
SUCCESSFUL CYBER WAR OPS AS OF 2016.01.05
This map lists all unclassified Cyber Squirrel Operations that have been released to the public that we have been able to confirm. There are many more executed ops than displayed on this map however, those ops remain classified.
http://www.cybersquirrel1.com/