Script kiddie: Script kiddie is an unsophisticated individual with little or no skills when it comes to technology. The person uses code that was written by others and is freely accessible on the internet. It might copy a malicious script directly from one website to another , only the knowledge of copy and paste is required. It uses code and probably doesn't understand how it works and what the effect will be.
Hactivist: A hacker who gains unauthorized access to and causes disruption in a computer system in an attempt to achieve political or social change. It is the act of hacking, or breaking into a computer system, for a politically or socially motivated purpose. The individual who performs an act of hacktivism is said to be a hacktivist.
Insiders: Present and past employees, contractors, partners, and any entity that has access to proprietary confidential information and whose actions result in compromised security
Hacktivists, Insiders, and so on will usually have a higher level of sophistication when it comes to technology.
APT: An Advanced Persistent Threat (APT) is a network attack in which an unauthorized person gains access to a network and stays there undetected for a long period of time. The intention of an APT attack is to steal data rather than to cause damage to the network or organization.
