A mystery hacker allegedly stole $25m (£20m) in crypto-currencies – then returned the funds two days later. Records show that funds during a sort of crypto-currencies were withdrawn from the DForce platform based in China.
A sum of $10m was taken in Ethereum, for instance, while an extra $10m was taken in digital coins tied to the US dollar and $4m in other coins.
Roughly an equivalent amount has now been returned – although during a different mixture of crypto-currencies.
DForce is a web service that permits users to form crypto-currency transactions with each other.
“The hackers have attempted to contact us and that we shall enter into discussions with them,” wrote DForce founder Mindao Yang during a blog shortly after the attack happened, on Sunday.
“This attack not only harmed our users, our partners, and my co-founders but also me personally. My assets were stolen during this attack, too,” he added. Mr. Yang has promised an extra update on things later today. The BBC has also contacted DForce for comment.
In a technical blog about the alleged hack, blockchain security firm PeckShield explained how the attacker managed to withdraw crypto-currency by tricking the DForce system.
In essence, the attacker was allegedly ready to withdraw funds by convincing the system that cash had been deposited, when it had actually been siphoned away.