Levy, who began the day one shot behind, overtook Quiros at the top of the leaderboard with a birdie on the third hole after the Spaniard made an error on the second, and he remained in front for the remainder of the day.
Two more birdies and a bogey saw him make the turn in 34, and a bounce-back birdie on the 17th after a dropped shot on 16 gave him the advantage heading down the last. The 27-year-old holed his five-footer for par on the final hole, leaving Quiros and Mikko Illonen in need of eagles on the 18th to force a play-off.
Quiros managed a birdie-birdie finish to secure solo second, while Illonen parred his way in from the 13th to end up in a tie for third with Andrea Pavan, Joakim Lagergren and Alexander Bjork.
"This feels so good," Levy said after his win. "I'm a little bit tired now because it was really tough today but I did a really good job today. For me, I played an amazing game. I'm so happy to win this trophy.