Final answer:
A misfeasor is someone with legitimate system access who abuses their power to evade audits and suppress audit collection.
Step-by-step explanation:
The individual described in the question is known as a misfeasor. This term refers to someone who has legitimate access to a system but abuses their power, often evading auditing and suppressing audit collection.
The misfeasor is in contrast to a masquerader, who is someone with no authorized access who pretends to be a legitimate user, a clandestine user, who is an individual who gains access to a system with the intent to keep their presence secret, and a superuser.