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Hackers who robbed the largest cryptocurrency in history from Poly Network, a departmentalized financial services company, returned most of the stolen assets.
According to Reuters on the 12th (local time), most of the assets stolen from hackers were returned by PolyTetwork, which was hacked earlier this week.
As soon as the funds were returned, PolyNetwork tweeted that the hackers were "white hat." They are not assets, but hackers with "morality" that aim to expose cyber vulnerabilities.
PolyNetwork said that almost all cryptocurrencies that had been stolen were sent to multi-signed wallets, and the only cryptocurrency that has yet to be returned was $33 million worth of Tether frozen earlier in the week.
"The return process has not been completed yet," PolyNetwork said. "We hope to maintain dialogue with the White Hat and deliver accurate information to the public to ensure safe recovery of user assets."
One of the hackers claimed he was one of the hackers and promised to provide $500,000 (about 581.75 million won) if PolyNetwork returned the stolen assets and not hold him responsible for the incident.
The Polly Network said on the 10th that the platform was under cyber attack and urged hackers to return the stolen funds.
Chain Analytics, a blockchain forensics company, explained that hackers who are still unknown seem to have detected and used vulnerabilities on digital contract platforms used by polynetworks.
As hackers began to return stolen cryptocurrency on the 11th, some blockchain analysts speculated that it might be too difficult to wash the stolen cryptocurrency on a large scale.
Some say hackers are conducting hacking attacks to expose vulnerabilities in cryptocurrency platforms for "fun," and are always planning to return stolen assets after the attacks.
However, according to Cypertrace, a cryptocurrency information company, the polynetwork theft case far surpasses the record-high amount of $474 million recorded in the entire depi sector from January to July.
Cryptocurrency experts explained that most of the thefts show the risks in the unregulated dipi sector.
PolyNetwork is a company founded by Da Hongfei, a Chinese entrepreneur who established blockchain-related companies. It is a D-Fi company that provides services that allow or lend various cryptocurrencies without brokerage agencies.