DMM Bitcoin 해킹 사건 분석: 일본 암호화폐 거래소에서 발생한 3억 500만 달러 규모 자산 탈취

2025-08-25 • Kloint • DMM Bitcoin Hack Analysis: USD 305M Asset Theft at a Japanese Cryptocurrency Exchange •

https://klointcic.medium.com/dmm-bitcoin-%ED%95%B4%ED%82%B9-%EC%82%AC%EA%B1%B4-%EB%B6%84%EC%84%9D-%EC%9D%BC%EB%B3%B8-%EC%95%94%ED%98%B8%ED%99%94%ED%8F%90-%EA%B1%B0%EB%9E%98%EC%86%8C%EC%97%90%EC%84%9C-%EB%B0%9C%EC%83%9D%ED%95%9C-3%EC%96%B5-500%EB%A7%8C-%EB%8B%AC%EB%9F%AC-%EA%B7%9C%EB%AA%A8-%EC%9E%90%EC%82%B0-%ED%83%88%EC%B7%A8-45280025b51a

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DMM Bitcoin reported the unauthorized transfer of 4,502.9 BTC, valued at about USD 305 million at the time, from an operational wallet on May 31, 2024. The article treats the incident as a failure of hot-wallet withdrawal authority and key-management controls rather than a smart-contract exploit. DMM Bitcoin reported the loss to Japan's Financial Services Agency and said group funding would cover customer deposits.

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