Regulators ordered Australia's Bitcoin Group Ltd to stop making public statements about its plans to undertake the world's first IPO of a virtual currency exchange after the company approached potential Chinese investors via social media.

Melbourne-based start-up Bitcoin Group told Reuters in December 2014 it hoped to raise A$20 million ($15.6 million) on the Australian Stock Exchange and has been seeking expressions of interest from potential investors from the Chinese community through WeChat, a hugely popular Chinese instant messaging online service.

The Australian Securities and Investments Commission (ASIC) said on Friday it was prohibiting Bitcoin Group from making any further statements about its planned listing until it had filed a prospectus.

While globally there are at least two other publicly traded Bitcoin companies following "backdoor listings," Bitcoin Group would be the first to offer shares in an IPO.

"The publications were made before Bitcoin Group Ltd was registered as an Australian company by ASIC and before the lodgment of a formal disclosure document (eg. a prospectus)," ASIC said in a statement.

"ASIC expects companies to be fully aware of their obligations regarding advertising or publicity that occurs before making a regulated disclosure document available to investors," the statement said.

ASIC said the actions related to Bitcoin Group specifically and not to Bitcoin generally, but the move will increase scrutiny on the controversial new virtual currency.

Bitcoins are created through a "mining" process that uses a computer's resources to perform millions of calculations.

Advocates say Bitcoin is revolutionary as it is not controlled by a central bank, but its rising popularity has stoked concern it can be used as a vehicle to launder money and finance militant groups.

On February 11, Hong Kong lawmakers urged authorities to ban Bitcoin after a group of more than 25 people went to the police headquarters to complain over dealings involving the digital currency that media estimated could have duped investors of up to $387 million.