Chiragh had rounds of 73, 72, 67 and 69 and he may well have finished even better but for two bogeys in his second nine, after starting from the tenth.
Of the other Indians, Himmat Rai (73) was tied 37th, while Rahil Gangjee (75) and SSP Chawrasia (72) were tied 39th and S Chikkrangappa, who had an eagle and two doubles in his 72, was tied 55th.
Meanwhile, Australian Scott Hend enjoyed a one-shot triumph for his second title of the season and ninth Asian Tour career victory.
Overnight leader Prom Meesawat endured a disappointing 72 to finish three back in joint third place with American Paul Peterson (69), Korea's Jeunghun Wang (69) and Thailand's Pavit Tangkamolprasert (66) in the USD 300,000 Asian Tour tournament.
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"I lost the tournament in Wentworth, lost the tournament in Mauritius and had chances in China. That's four times this year and I didn't win. Whether this was my golf course or not, I've been playing very good golf and trying to not get down on myself. It's nice to win again," said Hend, who was victorious at the True Thailand Classic earlier this season.
"There are three more weeks for the Olympic qualifying. I'm 43 this year, who knows how much longer (I can play) although I'm getting better with age. It'll be nice to go the Olympics and be one of the first Australians to play in it since golf's reinclusion. It's all these different things that you chalk up in your career and when you're finished, you just sit back and say this is what I did," said Hend, who totalled 15-under-par 269 and earned USD 54,000.