Brazilian cryptocurrency platform Mercado Bitcoin (MB) confirmed on X that it had identified and contained “a security incident in one of our systems” in the early hours of Monday, November 2, according to Seu Dinheiro and Livecoins. The company temporarily suspended deposits and withdrawals as a precautionary measure while it investigates, traces the assets and coordinates with the authorities.
MB says there were no losses for clients and no data leak, according to both outlets. It has not given a figure for the amount taken or a date for resuming operations.
Independent blockchain trackers estimate that some $40 million left addresses that may be linked to the platform, according to Seu Dinheiro. Security firm Hypernative, cited by Livecoins, details outflows of some 106 bitcoins, 2,852 ether and 10,700 SOL, among other assets, on at least nine networks, most of them from 02:15 UTC onward, through simple transfers rather than a smart contract flaw.
Story under review: Mercado Bitcoin has not confirmed the amount; the $40 million figure comes from private trackers, and it is not known how the attacker obtained the access needed to sign the transactions. The company's post on X could not be accessed.
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