Lubian mining pool was stolen in 2020 and lost 127,000 BTC, hackers still control the assets and become the 13th largest BTC holder in the world

According to Arkham, Lubian, once one of the top ten mining pools in the world, suffered a major security incident in December 2020, with a total of 127,426 BTC stolen, worth $14.50 billion at the current currency price, making it the largest bitcoin theft in history.
According to Arkham, Lubian used to be a Chinese mining pool with mining farms in China and Iran. In May 2020, it controlled nearly 6% of the total network computing power of the Bitcoin network and had significant industry influence. The attack took place on December 28, 2020. The attacker is suspected to have used a vulnerability in its private key generation algorithm to successfully steal more than 90% of the position through brute force cracking. The next day (December 29), the hackers transferred part of the BTC again, with an amount of 6 million US dollars.
In addition, Lubian tried to intercede with hackers through on-chain OP_RETURN messages to request the return of stolen assets. A total of 1,516 transactions with messages were sent, costing a total of 1.4 BTC, further confirming that the incident was not a counterfeit.
At present, Lubian still retains 11,886 BTC (about $1.35 billion), and the hacker's last on-chain act was an address consolidation in July 2024. As of the disclosure date, the hacker still controls the stolen BTC, the identity is unknown, and its holdings have ranked 13th in the world BTC holders, even more than the Mt. Gox hacker address.