Thai Trail: Illegal Bitcoin Mining Served as a Front for Laundering $300 Million
Thailand's Department of Special Investigation (DSI) has significantly expanded the scope of its investigation, linking illegal cryptocurrency mining to a large-scale transnational money laundering scheme. According to the agency's estimates, the annual turnover of this criminal network exceeded 10 billion Thai baht, equivalent to approximately $300 million.
During the investigation, it was revealed that the illegal mining farms were just the tip of the iceberg. Authorities connected these operations with so-called "gray Chinese capital," the activities of fraudulent call centers, and online gambling networks. Analysis of bank accounts and affiliated companies revealed abnormally high financial activity. Particular attention was drawn to the fact that Myanmar citizens were withdrawing between 30 and 50 million baht in cash daily from Thai banks — a characteristic sign of schemes to cash out criminal proceeds.
From Seized ASIC Miners to an International Conspiracy
The case itself originates from raids in 2025 against underground mining sites. At that time, the DSI dismantled three major networks that were illegally connecting to power grids. During the operations, more than 6,390 mining devices were seized. The damage to the state-owned energy company Provincial Electricity Authority (PEA) is estimated at over 953 million baht (about $29 million).
Currently, the DSI has issued eight arrest warrants: four against Chinese financiers and another four against Myanmar nationals. The agency has also requested an additional seven warrants and summoned five suspects for testimony.
A key figure in this network is believed to be a certain Wang Yicheng. Law enforcement links him to a major digital asset fraud case. The U.S. Secret Service has already seized cryptocurrencies linked to him worth over $17.8 million. The total damage from this episode exceeds 2 billion baht.
Analysis of fund flows showed that over $90 million was deposited into a crypto account registered under Wang Yicheng's name from January 2021 to November 2022. Of that amount, at least $9.1 million was sent from a wallet linked to "pig butchering" scams. The DSI also forwarded two cases to Thailand's National Anti-Corruption Commission, involving seven PEA employees, one law enforcement officer, and 13 investors or alleged accomplices.
Notably, this is not an isolated incident in the region. In November 2025, Malaysian authorities uncovered $1.1 billion in electricity theft resulting from illegal mining. State-owned company Tenaga Nasional Berhad discovered 13,827 sites that had illegally consumed electricity for mining bitcoin and other digital assets between 2020 and 2025.
My comment as an analyst: This case clearly demonstrates how cryptocurrency mining, especially in regions with cheap electricity, becomes an ideal tool for converting "dirty" fiat money into digital assets. The difficulty of tracking physical miners and their energy consumption makes this sector extremely vulnerable to abuse. We are seeing Thai and Malaysian authorities move from combating electricity theft to comprehensive investigations that uncover the entire chain of financial crimes. This is a serious signal for the industry: regulators are beginning to see the forest for the trees.