Via the internet, rocky sabotages the computer system of quik chik'n company, a food manufacturer, with the purpose of altering the levels of ingredients of the company's products so that consumers of the food become ill. rocky is

The answer is a cyberterrorist.

A cyberterrorist is someone who willfully uses the Internet to create physical and psychological harm or disruptions to another individual or entity for their own gains, be it socio-politically or monetary motivated.

Cyberterrorists can be associated with a terrorist group or an individual acting alone such as Rocky in the example. They often employ known hacking techniques to achieve their goals.