Poly Network hacker returns almost all funds but declines a $500K white hat incentive.

"The poly did offer a reward, but I never took them up on it. Instead, I'll return all of their funds to them" remarked the hacker.

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The hacker who stole $610 million from the Poly Network cross-chain decentralized finance (DeFi) protocol has returned virtually all of the funds, claiming their activities were "white hat activity."

According to a Thursday update from Poly Network on the assault, the $610 million in cash stolen were all taken through an exploit that employed "The funds were transferred to a multisig wallet held by the project and the hacker due to a vulnerability between contract calls."

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The only remaining tokens are around $33 million in Tether (USDT), which were frozen as soon as the assault was discovered.

Through encoded messages in Ethereum transactions, the hacker communicated with the Poly Network team and others.

They claimed to have done the breach "for fun" because "cross-chain hacking is trendy," but it appears they had no plans to move the monies after successfully taking them.

On Wednesday, however, the hacker refunded $258 million of the funds after meeting with the project and users.

Poly Network ruled that the hacking was "white hat behavior" and offered the hacker, called "Mr. White Hat," a $500,000 reward:

Poly Network victime d'un piratage record de cryptomonnaies

"We guarantee that you will not be held responsible for this situation.

We sincerely hope you will be able to return all of the tokens as soon as possible [...]

When the other funds, with the exception of the frozen USDT, are returned, we will transfer you the $500,000.”

"The poly did offer a reward, but I never took them up on it.

Instead, I'll return all of their funds to them "remarked the hacker

The biggest hack in decentralized finance appears to be coming to a conclusion now that the remaining funds, with the exception of the frozen USDT, have been refunded.

Though the hacker's identity hasn't been revealed, Chinese cybersecurity firm SlowMist issued an update shortly after the news of the breach leaked, claiming that its investigators had tracked down the attacker's email address, IP address, and device fingerprint.

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