Alex Castro is the artist behind the illustrations for theacastrobitcoin.
In a post published in the early hours of Thursday morning, the exchange acknowledged that it had lost over $30 million in the hack that took place on January 17th.
Kris Marszalek, the company's CEO, confirmed yesterday that the company had communicated around the hack.
The total value of the unauthorized withdrawals was more than double the value of the actual currency, at a current exchange rate of $18.6 million. The post states that 483 users had their accounts compromised.
All affected customers have been paid back their losses.
The latest communication from the company provides the most insight yet into the security breach, although details of the exact method of compromise remain unclear.
The post states that the risk monitoring systems detected unauthorized activity on a small number of user accounts where transactions were being approved without the 2FA authentication control being inputted by the user. Multiple teams responded to assess the impact. For the duration of the investigation, all withdrawals on the platform were suspended. Any accounts that were impacted were fully restored.
All customers will need to switch over to the new system after the exchange migrated its two-factor authentication system to a new architecture.
Some of the most high-value targets in the rapidly growing criptocurrency market are the ones that have been the subject of recent attacks. According to an analysis by NBC News, there were more than 20 exchange hacks in which the hacker escaped with more than $10 million in profit.
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