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$600 million hack: The biggest crypto theft in history

August 11, 2021

Hackers have stolen some $600 million in cryptocurrency from the decentralized finance platform Poly Network, in what it says is the largest theft in the industry’s history.

A vulnerability in Poly Network allowed the thief to make off with the funds, the platform said Tuesday, begging the attacker to return the money.

“The amount of money you hacked is the biggest one in the DeFi history,” Poly Network wrote in a letter to the attacker it posted to Twitter. “The money you stole are from tens of thousands of crypto community members… you should talk to us to work out a solution.”

Poly Network urged other members of the cryptocurrency ecosystem to “blacklist” the addresses used by the attacker to siphon away the funds — which included a mix of various coins including $33 million of Tether, according to Tether’s CTO. The cryptocurrency exchange Binance said it was “coordinating with all our security partners to actively help.” Poly Network links together the blockchains of multiple virtual currencies to create interoperability among them.

Following the hack, Poly Network established several addresses to which it said the attacker could return the money. And it appears the hacker is cooperating: As of 7:47 a.m. ET Wednesday, Poly Network said, it had received about $4.7 million back. It was not immediately clear who was behind the hack or why the money is being returned.

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