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Cross-chain protocol Poly Network has informed users of an exploit resulting in over $600 million worth of assets being taken by hackers.

The Biggest Hack in Crypto History 

In a tweet posted Tuesday, Poly Network revealed that it had fallen victim to a hack resulting in the loss of over $600 million worth of assets across the Binance Smart Chain, Ethereum mainnet, and the Polygon network. 

Important Notice:
We are sorry to announce that #PolyNetwork was attacked on @BinanceChain @ethereum and @0xPolygon Assets had been transferred to hacker’s following addresses:
ETH: 0xC8a65Fadf0e0dDAf421F28FEAb69Bf6E2E589963
BSC: 0x0D6e286A7cfD25E0c01fEe9756765D8033B32C71

— Poly Network (@PolyNetwork2) August 10, 2021

Poly Network lists the addresses where funds were transferred to in the same Twitter thread, requesting that miners and crypto exchanges blacklist tokens coming from the hacker’s addresses. Additionally, Poly Network has threatened legal action, urging the hackers to return all assets taken. 

Estimates of the amount taken vary, with at least $264 million stolen on Ethereum, $250 million from the Binance Smart Chain, and a further $85 million on Polygon. As Poly Network is a multi-chain protocol used by many projects, the full extent of the damage may not have been identified yet. 

As news of the hack circulated online, members of the crypto community were quick to act. Moments before the hacker attempted to deposit the stolen funds into Curve Finance, Tether CTO Paolo Ardoino blacklisted the hacker’s address, freezing the USDT funds. Unfortunately, the hacker still managed to transfer some USDC funds into Curve’s stablecoin pool, making a recovery near impossible. 

. @Tether_to just froze ~33M $USDt on 0xC8a65Fadf0e0dDAf421F28FEAb69Bf6E2E589963 as part of the #PolyNetwork hack

— Paolo Ardoino (@paoloardoino) August 10, 2021

While the Poly Network hack looks to be one of the largest cases of cryptocurrency theft in history, it may also rank highly compared to the biggest heists of all time. Only one other incident looks to have resulted in more money lost when Saddam Hussein’s son took $930 million from the Bank of Iraq days before the Iraq invasion in 2003. 

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