Tether’s blockchain sleuths help Brazil bust $5.7m cyber fraud ring

Brazilian authorities just pulled off a major crackdown on a sophisticated money laundering network with the help of Tether. The stablecoin giant’s real-time tracking tools led to the freeze of R$32 million in USDT, exposing how crypto forensics is outpacing traditional finance in hunting down dirty money.

On July 18, USDT issuer Tether announced its role in assisting Brazilian law enforcement to dismantle a sprawling cyber fraud operation, codenamed Operation Magna Fraus.

According to the press release, the São Paulo Public Prosecutor’s Office and Federal Police targeted a criminal syndicate accused of siphoning funds through Brazil’s PIX payment system before funneling them into USDT. Over two days of raids across Goiás and Pará, authorities seized R$5.5 million in crypto and froze another R$32 million ($5.7 million) in Tether, marking one of the country’s largest stablecoin-related busts to date.

How blockchain transparency is rewriting the rules of crime fighting

In addition to freezing R$32 million in USDT, Brazilian authorities also uncovered a private key linked to stolen crypto assets, a rare find in such operations. The key granted access to wallets holding illicit funds, which were promptly transferred into state custody.

According to São Paulo’s Public Prosecutor’s Office, these assets will be liquidated and placed under a judicial account managed by the Criminal Court Specialized in Tax Crimes, Criminal Organizations, and Money Laundering. This mechanism ensures any recovered value remains under the oversight of Brazil’s criminal justice system as proceedings move forward.

Tether’s involvement in Operation Magna Fraus is far from an outlier. Over the past year alone, the company has become a go-to ally for law enforcement agencies cracking down on illicit finance.

In June 2024, the U.S. Department of Justice credited Tether with helping seize $225 million in USDT tied to a high-profile fraud case. Months later, it aided the U.S. Secret Service in freezing $23 million linked to transactions on Garantex, a Russian exchange blacklisted for sanctions evasion, and another $9 million tied to the Bybit exchange hack.

To date, Tether has blocked over 5,000 wallets, with more than half of this figure in collaboration with U.S. authorities, signaling a seismic shift in how stablecoins are policed.