Slow Mist Cosine: Previous WETH Phishing Incident on Blast Due to nferno Drainer Supporting Offline Authorization Signature
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September 20, 2024
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ChainCatcher reports that SlowMist Cosine posted on the X platform that there are several key points to note regarding the recent phishing incident involving WETH on Blast:
- The WETH on Blast is Blast's own wrapped ETH token, with an upgradeable contract that supports permit offline authorization signatures.
- The WETH code on the Ethereum mainnet is only about 50 lines long, incredibly simple and reliable. The amount of WETH issued directly corresponds to the amount of ETH held in the contract, with no fancy features like permits.
- The user was phished because Inferno Drainer supported Blast WETH permit offline authorization signatures. The phishing group truly studied the details, and details determine success.
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