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Bitcoin cold-wallet attack spreads to 4,500 addresses as losses near $89 million

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Bitcoin cold-wallet attack spreads to 4,500 addresses as losses near $89 million

Galaxy Research flagged a third wave of sweeps tied to weak Coldcard-generated keys, with the attacker now targeting smaller balances and changing how funds are collected onchain.

Bitcoin cold-wallet attack spreads to 4,500 addresses as losses near $89 million

Source：CoinDesk

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Source：https://www.coindesk.com/tech/2026/08/02/bitcoin-cold-wallet-attack-spreads-to-4-500-addresses-as-losses-near-usd89-million