This type of attacker is commonly referred to as a "script kiddie." The term "script kiddie" is used to describe individuals who engage in malicious hacking activities, but who lack the skill and knowledge to carry out more advanced attacks. They often use pre-written scripts or tools obtained from the internet to carry out their attacks. In the context described, the low-skilled attackers who want to breach the university network simply to prove they can or for some low-level crime, such as changing a grade, would likely fit into the category of script kiddies.