bandit
Definitions
A robber or outlaw, especially one who operates as part of a gang in an unsettled area.
A person who steals or cheats, often used to describe someone who takes unfair advantage.
Examples
The masked bandit escaped into the dark forest with the stolen gold.
The software update was a total bandit, stealing all my saved preferences.
Legend says a notorious bandit once hid his treasure in this very cave.