South Korea Uncovers $101M Crypto Laundering FX Scheme

• South Korea uncovered a crypto laundering ring that moved about 148.9 billion won through illegal FX channels.
• The scheme used multi-country crypto accounts and small transfers to evade financial monitoring systems.
• Suspicious crypto reports hit 36,684 in 2025 as authorities tightened identity checks below 1 million won.

South Korean customs authorities have shut down an international cryptocurrency laundering operation accused of moving nearly 150 billion won through unauthorized foreign exchange channels, highlighting the country’s intensifying scrutiny of cross-border digital asset flows.

According to the Korea Customs Service (KCS), three Chinese nationals have been referred to prosecutors for alleged violations of South Korea’s Foreign Exchange Transactions Act. Investigators said the suspects laundered approximately 148.9 billion won, equivalent to about $101.7 million, between September 2021 and June last year.

KCS said the group exploited a web of domestic and overseas cryptocurrency accounts alongside multiple South Korean bank accounts. Funds were transferred under the appearance of legitimate expenses, including overseas study costs for students, cosmetic operation fees for foreign nationals, and payments linked to trade or duty-free activities.

Authorities explained that the suspects purchased cryptocurrency in several countries, transferred the assets into digital wallets based in South Korea, converted them into Korean won, and then dispersed the proceeds through numerous local bank accounts. This structure was designed to fragment transactions and reduce visibility for financial monitoring systems.

Evasion Tactics and Regulatory Gaps

Customs officials noted that the use of crypto accounts across multiple jurisdictions complicated efforts to trace transaction origins and destinations. The case brought out gaps in monitoring cross-border digital asset movements, particularly when transactions were split into smaller amounts.

In response, KCS stated that enhanced identity verification requirements are now being applied even to transfers below 1 million won, a threshold previously used to avoid closer scrutiny. Officials described the measure as part of a broader effort to close loopholes exploited by illicit actors.

Surge in Suspicious Activity Reports

The investigation comes following a rise in crypto-related alerts. In 2025 alone, South Korea recorded 36,684 suspicious transaction reports filed by local virtual asset service providers between January and August, surpassing the combined totals from 2023 and 2024.

A KCS representative, Jin Sung-joon, stated that the increased reporting signals closer coordination between customs authorities and regulated crypto firms. The agency highlighted that the disclosures are intended to improve transparency and protect the integrity of the financial system.

Related: South Korea FSC Crypto Freeze Total Reaches $61.4 Million Since 2019