Brazilian crypto exchange Mercado Bitcoin disclosed a security incident on Nov. 2, according to Bitcoin.com News, with about $38 million in digital assets reported stolen. A separate estimate from Arkham Intelligence analyst Emmett Gallic put suspicious transfers at more than $46 million, though the two figures have not been reconciled. Mercado Bitcoin said users would not suffer asset losses from the incident. The exchange has suspended deposits, withdrawals, and platform services, and said it has notified the relevant authorities. Preliminary analysis indicated that the attacker may have gained control of signing credentials used to authorize transactions. Bitquery said the suspicious transfers touched multiple blockchains, including Ethereum, Bitcoin, Solana, Stellar, Arbitrum, Tron, and Polygon, while the exact intrusion path remains unclear. Mercado Bitcoin also said it worked with Tether, Circle, Paxos, BRL1, and Chainalysis to freeze $11 million in assets and had identified additional funds that could still be frozen. The company has not provided a timeline for restoring services.
Brazilian crypto exchange Mercado Bitcoin disclosed a security incident on Nov. 2, with about $38 million in digital assets reported stolen, according to Bitcoin.com News.
Arkham Intelligence analyst Emmett Gallic separately estimated that suspicious transfers exceeded $46 million. The two figures have not been reconciled.
Mercado Bitcoin said users would not suffer asset losses as a result of the incident. The platform has suspended deposits, withdrawals, and platform services, and said it has notified the relevant authorities.
Preliminary analysis showed that the attacker may have gained control of signing credentials used to authorize transactions. Bitquery said the suspicious transfers involved multiple chains, including Ethereum, Bitcoin, Solana, Stellar, Arbitrum, Tron, and Polygon. The exact intrusion path has not been determined.
Mercado Bitcoin said it has worked with Tether, Circle, Paxos, BRL1, and Chainalysis to freeze $11 million in assets, and that it has identified other funds that could be frozen. The exchange has not announced a specific timeline for restoring services.
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