Dishonest, intentionally illegal, or immoral actions is:

Malfeasance refers to the performance of an act that is illegal or wrongful, particularly by a public official or someone in a position of authority. It encompasses actions that are not just unethical but are also in direct violation of the law, indicating a clear intent to do wrong. This term is especially relevant in contexts where individuals have a duty to act in a lawful and responsible manner, and any deviation from that, such as engaging in dishonest or immoral behavior, categorizes the act as malfeasance.

In contrast, negligence generally pertains to carelessness or a failure to act with the proper level of caution, without the intent to cause harm. Willful and wanton conduct refers to actions that demonstrate a reckless disregard for the safety of others, indicating an element of knowledge of the risk involved, but not necessarily outright illegal or immoral intent. Misfeasance involves the improper performance of a lawful act, meaning that while the act may be legal, it is carried out in a way that is negligent or irresponsible.

Overall, the definition of malfeasance aligns closely with the question's description of actions that are not only dishonest but also illegal or immoral.