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Bybit Loses $1.46 Billion in Ethereum Due to Cyber Attack

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by Giorgi Kostiuk

5 months ago


The cryptocurrency exchange Bybit has confirmed that it has fallen victim to a sophisticated attack on its Ethereum cold wallets, resulting in a significant loss of funds.

Technical Details of the Attack

The attack leveraged a technique known as 'musked UI,' where all authorized signers on Bybit's ETH multisignature wallet were deceived into approving a malicious transaction. The compromised UI displayed the correct transaction details and the expected recipient address, without raising suspicions. The transaction message concealed a more nefarious operation - the approval of a change to the smart contract logic of the ETH cold wallet, granting unauthorized access to the attacker who then drained the wallet to an unidentified address.

Security Measures and Implications

Bybit promptly responded to the detected breach, ensuring that other cold wallets remained secure and that withdrawal and exchange operations continued to function normally. The incident raises serious concerns over the security of multisignature wallets, highlighting how UI elements can be manipulated to mislead authorized signers. This event serves as a critical challenge for developing new defensive measures in the crypto industry.

Tracking and Recovering Funds

Blockchain transparency allows for real-time tracking of fund movements. The stolen funds were transferred to an unknown address, as detailed in the Ethereum blockchain transaction log. Efforts are underway within the cryptocurrency community to trace and potentially recover the stolen assets. Blockchain analytics firms may play an essential role in tracking fund movements and identifying potential exit points.

The incident is a crucial reminder of the need for improving security measures in the crypto industry. Bybit's transparency and swift response to the incident underscore the importance of adapting to new challenges in the digital world, ready to inform future security best practices.

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