NYTimes: ISIS Targeted by Cyberattacks in a New U.S. Line of Combat – 26 APR 16

http://www.nytimes.com/2016/04/25/us/politics/us-directs-cyberweapons-at-isis-for-first-time.html?smprod=nytcore-iphone&smid=nytcore-iphone-share

LONDON — The United States has opened a new line of combat against the Islamic State, directing the military’s six-year-old Cyber Command for the first time to mount computer-network attacks that are now being used alongside more traditional weapons

See also:

https://global.oup.com/academic/product/cyber-war-9780198717492?lang=en&cc=us