$BTC

🤯 In Arkham, the largest crypto theft in history was revealed – 127,426 BTC worth $3.5b at the 2020 exchange rate (currently ~$14.6b).

At its peak in 2020, the Chinese mining pool LuBian controlled nearly 6% of the Bitcoin network's hash rate. But in December of the same year, it was hacked:

⊹ December 28 – hackers withdrew more than 90% of BTC from wallets.

⊹ December 29 – another $6m in BTC and USDT was stolen through an address on the Bitcoin Omni network.

⊹ December 31 – the remaining funds were transferred to backup wallets.

LuBian attempted to contact the hackers through OP_RETURN messages in the blockchain – 1516 transactions and 1.4 BTC were sent as requests to return the assets.

No one publicly reported this – neither the company nor the perpetrators.

The reason for the hack was a vulnerable algorithm for generating private keys, susceptible to brute force attacks.

All stolen BTC is still stored at one address – it is the 13th largest BTC wallet in the world.