243 hack event(s)
Description of the event: Hacker exploited the data overflow to attack the smart contract of BeautyChain, successfully transferred the BEC token to the two addresses resulted in the massive BEC being sold in the market, and the value of the digital currency was almost zero, which brought a crushing blow to BEC market.
Amount of loss: $ 1,000,000,000 Attack method: Overflow
Description of the event: On July 29, 2017, the Ethereum multi-signature wallet company Parity issued a security alert, notifying users of serious vulnerabilities in its wallet v1.5 or later. That day, a black hat hacker used the vulnerability to exhaust the Parity wallets of three Ethereum projects, stealing a total of 153,037 ETH from Swarm City, Edgeless, and Aeternity.
Amount of loss: 153,037 ETH Attack method: Unauthorized operation
Description of the event: The DAO smart contract running on the Ethereum suffered a reentrancy-attack-on-smart-contract.
Amount of loss: $ 60,000,000 Attack method: Reentrancy attack