Authorities in Switzerland and Germany have shut down Cryptomixer.io, a cryptocurrency-mixing service allegedly used to launder vast sums of illicit Bitcoin (BTC).
The operation, supported by Europol, seized three servers, the site’s domain, over 12 terabytes of data, and Bitcoin worth more than €25 million ($29 million), officials confirmed.
Cryptomixer, active since 2016, allowed users to anonymise Bitcoin transactions by pooling funds and redistributing them in randomised patterns.
While crypto mixers can provide privacy for legitimate users, authorities say the platform became a preferred tool for cybercriminals involved in ransomware attacks, payment-card fraud, and trafficking of drugs and weapons.
Europol described it as “the platform of choice” for obfuscating the origin of illegal funds, with over €1.3 billion reportedly processed through its infrastructure.
The service was accessible on both the clear web and the dark web, enabling users to break on-chain transaction trails and convert Bitcoin into other assets or fiat without detection.
High-profile mixer shutdowns, such as Tornado Cash and ChipMixer, have previously targeted similar networks facilitating billions in illicit flows.
The operation, conducted between 24–28 November, involved Swiss and German police alongside Europol.
Germany’s federal investigation agency BKA noted that it worked closely with regional prosecutors in Frankfurt and Swiss authorities in Zurich.
The BKA added,
“The findings will also contribute to the investigation of further cybercrimes.”
Europol provided forensic analysis and coordinated the broader European effort.
Officials said the seizure of Cryptomixer’s infrastructure not only halted ongoing laundering operations but also provided a trove of data that could reveal further criminal activity.
The site now displays a seizure notice warning that anyone operating or using cybercriminal services is subject to investigation and prosecution.
By mixing funds, Cryptomixer obscured the origin of Bitcoin, making it difficult for authorities to trace criminal proceeds.
Europol highlighted the platform’s long settlement windows and randomised distribution as features that made it especially attractive to criminals seeking to launder ransomware payments, stolen card details, and funds from illicit trade.
The takedown forms part of an ongoing global law enforcement push to dismantle crypto services that enable illegal activity, recover assets, and gather intelligence on the networks behind cybercrime.
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