dishonesty — lack of honesty; a disposition to lie, cheat, or steal.
shadiness — abounding in shade; shaded: shady paths.
corruption — Corruption is dishonesty and illegal behaviour by people in positions of authority or power.
illegality — illegal condition or quality; unlawfulness.
fraudulence — characterized by, involving, or proceeding from fraud, as actions, enterprise, methods, or gains: a fraudulent scheme to evade taxes.
devious — If you describe someone as devious you do not like them because you think they are dishonest and like to keep things secret, often in a complicated way.
deceitfulness — given to deceiving: A deceitful person cannot keep friends for long.
unscrupulousness — not scrupulous; unrestrained by scruples; conscienceless; unprincipled.
corruptness — guilty of dishonest practices, as bribery; lacking integrity; crooked: a corrupt judge.
deceit — Deceit is behaviour that is deliberately intended to make people believe something which is not true.