The hackers who stole $6.3 billion from Binance last week found a way to remove 40% of the stolen cryptocurrencies in one go and reduce the chance of being detected during the operation. The cost was only $15. Looking at the transaction records on the Ethereum blockchain, you can see how this group of thieves turned a feature originally designed to make cryptocurrency wallets more convenient to use into an attack tool. This feature allows account authorization software to transfer funds on your behalf without having to obtain separate authorization for each transfer. Security company Blockaid said that the hacker paid an internet fee of about $15 to establish this license, then used it to transfer about 2.5 billion US dollars in a single transaction, equivalent to 40% of the total amount stolen.

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