The NSA with it's $53B budget for spying on everyone has placed back doors on all the networking hardware & software. Snowden warned us the app for gaining access into data networks/phones/email servers/even auto's would fall into the wrong hands and it has already has. The NSA has insured that all networks can now be easily hacked.
https://www.nytimes.com/2017/05/12/world/europe/uk-national-health-service-cyberattack.html?mcubz=0
You've got to be extremely specialized to know what you're looking for.
It's not like a kid with an Ehow search can do that. These guys are trained.