https://www.vice.com/en_us/article/bvn7k3/white-hat-hacker-returns-dollar1-million-stolen-in-crypto-theft-disaster

A hacker who stole more than $1 million from users of a cryptocurrency platform and then promised to return it keeping a tip for their services has kept their word.

On Wednesday, a hacker that called themselves a “white hat”—cybersecurity lingo for hackers who have no malicious intent—posted a message on the Ethereum blockchain asking victims to send them their transaction details.