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The total amount of money lost by blockchain hackers is about

$ 13,020,306,444.64

Total hack events 282

  • 2020-08-04

    Hacked target: Opyn

    Description of the event: On-chain options platform Opyn disclosed that its Ethereum put options were maliciously used by external participants. Opyn pointed out that all other Opyn contracts except Ethereum put options are not affected by this vulnerability. The attacker doubled the use of oToken and stole the pledged assets of the put option seller. According to Opyn statistics, a total of 371,260 USDC has been stolen so far. The Opyn team conducted a white hat hacking attack based on the Convexity Protocol and successfully recovered 439,170 USDC from the unpaid vault to further reduce the loss. Currently, the Opyn team has withdrawn its liquidity from Uniswap's Ethereum bearish capital pool and is investigating the situation.

    Amount of loss: 371,260 USDC Attack method: Double use oToken

  • 2020-07-31

    Hacked target: 2gether

    Description of the event: Spanish cryptocurrency payment application and credit card issuer 2gether announced that hackers stole $ 1.4 million last Friday (July 31) and the company could not immediately repay users affected by the attack. This trading platform will use the native token 2GT to compensate users.

    Amount of loss: $ 1,400,000 Attack method: Unknown

  • 2020-07-25

    Hacked target: Ledger

    Description of the event: On July 25, 2020, there was unauthorized access to Ledger's database, resulting in data leakage. The leaked data includes e-commerce and marketing data, but payment information and encrypted assets are safe. Ledger’s announcement claimed that the API Key was used to achieve unauthorized access to the database. Currently, the API Key has become invalid.

    Amount of loss: 0 Attack method: Unknown

  • 2020-07-16

    Hacked target: Twitter

    Description of the event: In the early hours of this morning, many celebrity politicians and some companies' Twitter accounts were attacked by hackers, and these Twitter accounts all published relevant digital currency phishing scam information. However, the phishing information was deleted a few minutes after it was posted. As of now, the scammers have received 12.86 bitcoins in total.

    Amount of loss: 12.86 BTC Attack method: Unknown

  • 2020-07-12

    Hacked target: Cashaa

    Description of the event: Cashaa, a UK-based cryptocurrency exchange, said hackers stole 336 Bitcoins from a wallet on the exchange. The company has now stopped all transactions related to cryptocurrency.

    Amount of loss: 336 BTC Attack method: Unknown

  • 2020-08-04

    Hacked target: Opyn

    Description of the event: On-chain options platform Opyn disclosed that its Ethereum put options were maliciously used by external participants. Opyn pointed out that all other Opyn contracts except Ethereum put options are not affected by this vulnerability. The attacker doubled the use of oToken and stole the pledged assets of the put option seller. According to Opyn statistics, a total of 371,260 USDC has been stolen so far. The Opyn team conducted a white hat hacking attack based on the Convexity Protocol and successfully recovered 439,170 USDC from the unpaid vault to further reduce the loss. Currently, the Opyn team has withdrawn its liquidity from Uniswap's Ethereum bearish capital pool and is investigating the situation.

    Amount of loss: 371,260 USDC Attack method: Double use oToken

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