South Korea Uncovers $102M Crypto Laundering Ring as FX Crackdown Intensifies

South Korean authorities have dismantled a cross-border money laundering operation that allegedly funneled nearly 148.9 billion won ($101.7 million) through cryptocurrency transactions and the domestic banking system, according to officials.

The Korea Customs Service (KCS) said on Monday that three suspects have been referred to prosecutors for alleged breaches of the Foreign Exchange Transactions Act. Investigators believe the network was active from September 2021 to June 2025, disguising illegal fund transfers as everyday overseas expenses such as cosmetic procedures and education fees.

Customs officials allege the group acquired crypto assets across multiple countries before sending them to wallets based in South Korea. The assets were then converted into won and distributed through a web of local bank accounts, a structure designed to avoid regulatory red flags.

The case comes as South Korea ramps up enforcement against unlawful foreign exchange activity. On Jan. 13, the KCS announced year-round intensive inspections aimed at underground money exchange networks that could destabilize currency markets. Authorities have grown increasingly concerned as discrepancies between trade payments processed by banks and goods declared to customs widened sharply. In 2025, that gap reached an estimated $290 billion, the largest divergence in five years.

Additional inspections conducted last year revealed the scale of the issue. A sector-specific probe found that 97% of surveyed companies were involved in illegal foreign exchange dealings, with violations totaling 2.2 trillion won, the KCS said.

The latest enforcement action also highlights the growing role of crypto in South Korea’s financial system. Data from the Financial Services Commission shows the country’s crypto market capitalization stood at 95 trillion won ($64.6 billion) as of June 2025, with average daily trading volume reaching $4.35 billion, underscoring why regulators are keeping the sector firmly in focus.