LuBian Mining Pool was hacked in 2020, resulting in a loss of 127,000 BTC. The hacker still controls the assets and has become the 13th largest BTC holder in the world.

On August 3, according to Arkham's disclosure, LuBian, which was once ranked among the top ten mining pools globally, suffered a major security incident in December 2020, with a total of 127,426 BTC stolen, worth approximately 1.45 billion USD at current coin prices, making it the largest Bitcoin theft in history. Arkham stated that LuBian was once a Chinese mining pool with mining farms in both China and Iran. In May 2020, it controlled nearly 6% of the total network computing power of the Bitcoin network, holding significant industry influence. The attack occurred on December 28, 2020, and the attackers allegedly exploited a vulnerability in its private key generation algorithm, successfully stealing over 90% of the holdings through brute force attack methods. The next day (December 29), the hacker transferred part of the BTC again, amounting to 6 million USD. Additionally, LuBian attempted to appeal to the hacker by sending on-chain OP_RETURN messages, requesting the return of the stolen assets. Officially, 1,516 transactions with messages were sent, consuming a total of 1.4 BTC, further confirming that the incident was not a hoax. Currently, LuBian still retains 11,886 BTC (approximately 1.35 billion USD), while the hacker's last on-chain activity was an address consolidation in July 2024. As of the disclosure date, the hacker still controls the stolen BTC, identity unknown, and their holdings rank as the 13th largest BTC holder in the world, even surpassing the Mt.Gox hacker address.