South Korean police have arrested 56 people accused of laundering the proceeds of a Cambodia-based phishing operation through Tether, a case that illustrates how the stablecoin has become the financial rail of Southeast Asia’s industrial-scale scam economy.
According to a newsis report, the Seoul Metropolitan Police Agency’s major crime unit said it had referred 23 suspects on charges including violating the Foreign Exchange Transactions Act and money-laundering reporting laws, detaining two key figures. A separate network of 33 was arrested on related charges, bringing the total to 56.
Inside the Seoul Bust
According to police, the core group laundered and illegally converted criminal proceeds from a Cambodia-based phishing syndicate on the orders of an overseas ringleader identified only as “C.” Between February 2024 and April 2025, the suspects allegedly bought Tether (USDT) and transferred it between domestic and foreign exchanges to convert roughly ₩16.8 billion, or about $11 million.
Investigators said an analysis of some 11,300 accounts tied to the laundering confirmed 265 cases of voice-phishing and investment fraud, with victim losses totaling around ₩25.7 billion (about $17 million).
Police obtained pre-indictment preservation of about ₩650 million ($430,000) in criminal proceeds and said the at-large ringleader “C” is the subject of an Interpol red notice. The second group of 33 allegedly ran a fee-based conversion service for foreign tourists and acquaintances, buying USDT, shifting it between exchanges, and selling it for foreign currency or won, an operation that handled roughly ₩6.3 billion ($4.2 million).
A Node in a Global Laundering Pipeline
The Seoul case is a single link in a chain that stretches back to the scam compounds of Southeast Asia. Cambodia alone hosts more than 250 such facilities, staffed by an estimated 100,000-plus trafficked and coerced workers and generating billions of dollars a year from “pig butchering” romance-investment fraud. The money those compounds extract has to be moved and cleaned, and increasingly, it moves as Tether.
USDT has become the rail of choice because it offers dollar stability and deep liquidity that volatile assets like Bitcoin cannot, letting launderers preserve value while breaking the trail across exchanges and borders. One analysis cited by United Nations investigators linked the stablecoin to roughly 84% of pig-butchering transaction volume, and a former California cybercrime prosecutor, Erin West, has said she has “never heard of pig butchering that isn’t Tether.”
The Korean ring’s method, buying USDT and bouncing it between domestic and offshore venues, is a textbook version of the laundering choreography documented across the year’s biggest scam crackdowns. South Korea, with its large, liquid exchange market, has emerged as one off-ramp in that system and is among the jurisdictions that have moved to freeze assets tied to the regional networks.
Why the Money Runs on Tether — and Its Limits
The conversion service run by the second group points to a broader shift in laundering tactics. As exchanges have grown more willing to freeze flagged funds, Chinese-language laundering networks and informal proxy converters have proliferated, offering to turn crypto into cash for a fee and keep transactions off compliant platforms. Cambodia’s Huione Group, which U.S. authorities estimate processed over $98 billion in inflows and laundered at least $4 billion before being severed from the U.S. financial system, was the industrial version of that service.
The same traceability that makes USDT useful to investigators, however, cuts against the launderers. Because stablecoin transfers are visible on-chain, Tether can and does freeze flagged wallets — it has worked with authorities to immobilize hundreds of millions of dollars tied to scams and sanctioned networks — and blockchain analysis is precisely what let Korean police map 11,300 accounts back to specific victims. USDT’s dominance in illicit flows reflects its dominance in crypto generally, and the stablecoin has extensive legitimate use; the same rails that scammers exploit are increasingly the ones that catch them.
A Widening Dragnet
The arrests land amid an intensifying global campaign against the scam economy. Washington and London have sanctioned Cambodia’s Prince Group and the Huione network; the U.S. has filed its largest-ever forfeiture action over roughly $15 billion in Bitcoin tied to Prince Group chairman Chen Zhi, and Cambodia has passed new anti-fraud legislation. Yet enforcement remains a game of whack-a-mole: when one laundering platform is cut off, its vendors migrate to the next.
Seoul police closed their announcement with a warning aimed at would-be intermediaries, that acting as a crypto-trading agent for others, or converting digital assets to won on someone else’s behalf, can itself be a punishable offense. As long as the compounds keep running and the proceeds keep flowing, the pressure on the conversion nodes that turn scam crypto back into spendable cash is likely to keep building.
Also Read: The 2026 Pig Butchering Reckoning: Inside the Year’s Biggest Crypto Scam Crackdowns
