breach may be worth up to $33M, suggests onchain analyst

Bitcoin Investing Made Simple! breach may be worth up to $33M, suggests onchain analyst

Onchain analyst claims that’s loss in the latest security breach might have been worth more than the reported $15 million.

Pseudonymous ErgoBTC, an on-chain analyst at Bitcoin (BTC) research firm OXT Research, claims that the security breach that was said to have resulted in the loss of 4.6K ETH ($15 million), may be worth up to $33 million.

On Monday, reports emerged that had halted withdrawals “after a small number of users” experienced suspicious transactions on their accounts. The cryptocurrency exchange has since resumed withdrawals and confirmed that its users’ money was ‘safe,’ but reports emerged later that it had lost 4.6K ETH ($15 million) and was being laundered using Tornado Cash.

ErgoBTC tweeted on Tuesday suggesting that another 444 BTC ($18.5 million) had been stolen from’s payout wallet. ErgoBTC said that OXT Research discovered a suspicious transaction of 52.55 BTC ($2.18 million) from’s custodial wallet.

Following the transaction, “several hundred withdrawals” were made which were then combined into four outputs worth 67.75 BTC ($2.81 million) each, as per ErgoBTC. The four batches amounted to 271 BTC ($11.25 million), all of which were laundered via Bitcoin tumbler- a service that allows customers to combine several transactions and make it more difficult for investigators to trace Bitcoin transfers.

The Bitcoin tumbler allegedly utilized by the alleged perpetrators to wash the 271 BTC is a well-known tool employed by the North Korean cybercrime syndicate, Lazarus, according to ErgoBTC’s tweet.

According to ErgoBTC, the criminals behind the security breach also controlled another address holding 172.9 BTC ($7.25 million). Blockchair data reveals that the address received the funds at about the same time as the other transactions linked to the hack. However, as of the publishing of this article, the purported hacker has not transferred the funds through a bitcoin tumbling service yet.

Related: ImmuneFi report $10B in DeFi hacks and losses across 2021

At the time of publishing is yet to acknowledge any losses. Cointelegraph reached out to for more details regarding its decision to halt withdrawals, but did not receive a response as of publishing time. This article will be updated pending new information.