The theft is expected to further weaken trade in cryptocurrencies, which the government has likened to "Ponzi schemes" that offer unusually high returns to early investors.
Coinsecure, which has over 200,000 users trading on its platform daily, said that around 438 bitcoins, which were stored in a password-protected virtual wallet were siphoned off to an unknown destination on the internet after the details were leaked online.
"We regret to inform you that our bitcoin funds have been exposed and seem to have been siphoned out to an address that is outside our control," the company said in a statement posted on its website.
Legal experts said there was a need to regulate the virtual currency market, instead of imposing restrictions on its trade.
(Also Read: Bitcoin Price Soars 11% To Two-Week High)
"It is for reasons like these that there is a need to regulate crypto-exchanges," said Anirudh Rastogi, founder and managing partner at TRA Law, a firm that specialises in emerging-technology businesses.
Coinsecure said it would compensate customers for losses from its existing funds.
Bitcoins were trading at Rs 4,80,000 or about $7,359 on Friday, according to cryptocurrency exchange Coinome, well below its international market price of about $7,771.
The Reserve Bank of India has already dealt a blow to the crytocurrency exchanges, barring banks from facilitating trade on virtual currencies and mandating them to unwind their existing relationship with exchanges within three months.
Elsewhere in Asia, Vietnam and South Korea have also suffered millions of dollars worth of fraud and embezzlement in some of the cryptocurrency businesses. Earlier this year, one of Japan's cryptocurrency exchanges was hit by a daring $530 million theft of digital money.
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