Major Bitcoin Theft Linked to LuBian Mining Pool
Recent investigations by Arkham Intelligence have revealed that a crypto wallet associated with an obscure Chinese mining pool, LuBian, may have been the target of the largest recorded Bitcoin heist to date. According to findings shared on August 2, 2023, a staggering 127,426 Bitcoin (BTC)—valued at around $3.5 billion at the time—was reportedly stolen from the LuBian Mining Pool in late December 2020. Notably, both LuBian and the suspected hacker have not publicly acknowledged the breach, marking Arkham as the first entity to report on this incident.
Background on LuBian Mining Pool
LuBian was one of the largest Bitcoin mining pools in the world during 2020, maintaining control over nearly 6% of Bitcoin’s total hash rate as of May that year. If the hack is verified, it would surpass previous high-profile thefts like Mt. Gox and Bitfinex in nominal loss value at the time of occurrence.
Details of the Hack
Arkham’s analysis indicates that on December 28, 2020, more than 90% of LuBian’s Bitcoin holdings were drained. Following this, another theft was reported two days later, involving about $6 million worth of BTC and USDT. This theft was linked to an address operated by LuBian on the Bitcoin Omni Layer. LuBian subsequently transferred its remaining 11,886 BTC—valued at hundreds of millions—into recovery wallets by December 31, 2020.
Calls for Justice
An intriguing aspect of Arkham’s report is the presence of OP_RETURN messages—special types of transactions that allow data to be embedded in the Bitcoin blockchain—that were sent from LuBian to the hacker. Arkham reports that the mining pool spent 1.4 BTC across more than 1,500 transactions in attempts to communicate with the thief, urging them to return the stolen assets. This indicates that the messages could have been sent by the rightful wallet owner.
Potential Vulnerabilities in LuBian’s Systems
Arkham suggests that the security breach might have originated from vulnerabilities in LuBian’s private key generation algorithm, making it susceptible to brute-force attacks. Thus far, it appears that most of the stolen Bitcoin has remained dormant, with the last significant movement recorded being a wallet consolidation in July 2024.
Current Status of Stolen Assets
Given Bitcoin’s price appreciation since 2020, the current value of the stolen assets is estimated to be around $14.5 billion. This would position the wallet associated with the LuBian hacker as the 13th largest BTC holder tracked by Arkham, overtaking holdings related to the infamous Mt. Gox breach.
Closure and Outlook
As of now, both the hacker and LuBian are believed to still control their BTC balances. While Arkham has released wallet trackers for both parties, no additional information about the identities involved in this major theft has been disclosed. The ramifications of this incident could lead to a more thorough examination of security practices in crypto mining pools and a renewed focus on safeguarding digital assets.
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