Mercado Bitcoin Suffers $40 Million Security Breach
Key Summary
Brazilian exchange Mercado Bitcoin halts withdrawals after an unauthorized exploit drains $40.00M in digital assets, including 6.70M XLM, while the platform simultaneously pursues infrastructure integration with the Sui Foundation.
Key Bullets
- Mercado Bitcoin suspended deposits and withdrawals after a $40.00M exploit targeted operational reserves.
- Attackers drained 6.70M XLM alongside Bitcoin and Ethereum across multiple blockchain networks.
- The exchange continues its strategic integration of Sui network assets and USDsui lending collateral despite the security incident.
Exchange Halts Withdrawals After Exploit
Brazilian exchange Mercado Bitcoin suspended user deposits and withdrawals following unauthorized outflows that drained over $40.00M in digital assets from operational wallets. Public on-chain transaction records confirmed that suspicious outflows began at 02:15 UTC across 10 separate blockchain networks, including Solana, Tron, and Arbitrum. The exchange acknowledged the operational disruption in an official statement while insisting that segregated client balances remained secure.
Independent blockchain security firm Hypernative monitored the asset movement and flagged the immediate transfer of 106 BTC alongside 2,852 ETH. Hackers targeted operational reserves rather than individual user accounts. Liquidity vanished from the order books as trading desks halted exposure to the platform.
Stellar Token Drains Hit XLM
On-chain tracking confirmed that attackers consolidated approximately 6.70M XLM at dedicated destination addresses following the initial breach. Mercado Bitcoin published the specific tracking addresses to help security firms monitor the stolen tokens in real time. Investigators are tracking the destination wallets to prevent laundering attempts across third-party liquidity providers.
The stolen funds moved through a complex web of cross-chain bridges before hitting destination pools. Traders took immediate notice of the reserve depletion. The platform has not yet provided a firm timeline for restoring normal withdrawal services.
Mercado Bitcoin Integrates Sui Assets
Mercado Bitcoin agreed to integrate SUI tokens, USDC, and USDsui into its Brazilian exchange platform according to an official announcement published by the Sui Foundation. Exchange customers gained direct purchasing, selling, and transfer capabilities for the specified assets on the network. The deployment brings regional fiat conversion tools together with high-speed settlement channels. Trading desks monitored liquidity flows following the announcement.
Public disclosures from the Sui Foundation confirm that USDsui will function as eligible collateral within Mercado Bitcoin lending products. Borrowing limits and liquidation rules depend strictly on internal risk parameters established by the exchange. Credit terms and stablecoin redemption conditions operate under separate legal frameworks. Risk desks evaluated the new collateral parameters immediately.
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