[CoinDesk] Mercado Bitcoin hack continued hours after exchange said attack was contained, report finds

Mercado Bitcoin suffered a hack that continued for hours after the exchange publicly claimed the attack was contained, according to a report by blockchain data firm Bitquery. The same attacker also took roughly $391,000, mostly from wallets Bitquery links to BitMart, whose founder confirmed a Nov. 2 hack and suspects a connection between the two incidents. The findings raise questions about the speed and accuracy of exchanges' incident disclosures and whether a single actor exploited weaknesses across multiple platforms. Watch for further attribution from Bitquery and BitMart, and for Mercado Bitcoin to clarify the timeline of when funds stopped leaving its wallets.