In response to queries from iTWire, Coinfirm's Grant Blaisdell said the 7070.9 bitcoin had been moved from gold (initial addresses) to orange addresses and finally to red ones by Sunday.
Changpeng Zhao, the founder and chief executive of the company, said while announcing the theft that the attackers had obtained a huge amount of user API keys, 2FA codes and possibly other information.
"Currently almost US$41.8 million is sitting in seven addresses held by the hacker," Blaisdell said, providing the following addresses and the amount held in each:
- bc1qw7g5uxxl750t0h2fh9xajwuxp4qt634yh3vg5q (1060.64)
- bc1q3a5hd36jrqeseqa27nm40srkgxy8lk0v0tpjtp (707.09)
- bc1q2rdpyt8ed9pm56u9t0zjf94zrdu6gufa47pf62 (1060.64)
- bc1qnf2ja3ffqzc3hskanjse6p8zag52fm6jgmmg9u (1060.64)
- bc1qx3628eh9tdnm0uzculu8k6r2ywfkc5zns2hp0k (1060.64)
- 16SMGihY94H8UjRcxwsLnDtxRt7cRLkvoC (1060.64)
- 1MNwMURYw1LkPnnpda2DQkkUsXXeKL9pmR (1060.64)
An ant-money laundering risk report for the largest new address where the stolen cryptocurrency is stored.
Asked what the chances were that the stolen bitcoin would be recovered, Blaisdell said: "Any exchange of legitimacy needs to have proper KYC (know your customer) in place, but it's not bullet-proof especially as a lot of them do not do it the proper way.
"As this is such a high-profile case, it would be quite unlikely that an exchange would willingly accept these funds on top of it but there’s always a small chance, even though not likely."
As to what measures could be put in place to prevent a recurrence of this kind of theft, Blaisdell said: "Well, it needs to start with strict security standards and protocols within these exchanges. Eventually there will probably be requirements relating to those similar to what banks etc must follow.
"The other question is what can we do outside of the security of the exchange itself to not only prevent, but properly handle these situations once these hacks happen.
"[One way is] making it hard for these entities to liquidate funds, by providing tools to other entities to recognise the risk of funds and counterparties. There are some solutions growing out on the market to provide these combinations of transparency and security such as the AMLT Network."
Graphics: courtesy Coinfirm