German and Swiss law enforcement agencies, with support from Europol and Eurojust, have dismantled the Cryptomixer cryptocurrency mixing service as part of Operation Olympia. The operation, conducted in late November 2025 in Zurich, resulted in the seizure of three servers, the cryptomixer.io domain, and over €24 million in Bitcoin. Authorities also confiscated more than 12 terabytes of data, which may contain logs and other information that could help identify users of the service. A warning was posted on the seized domain, alerting operators and users that they are subject to investigation and prosecution.
Cryptomixer was a hybrid mixing service accessible via both the clear and dark web, and it was widely used by cybercriminals to launder proceeds from ransomware, drug trafficking, weapons trafficking, payment card fraud, and other illicit activities. Since its inception in 2016, Cryptomixer reportedly processed over €1.3 billion in Bitcoin. The takedown follows similar actions against other crypto mixing services, such as the 2023 seizure of ChipMixer, and highlights ongoing efforts by international law enforcement to disrupt the infrastructure supporting cybercrime and money laundering.

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On or around December 1, 2025, European authorities publicly announced the dismantling of Cryptomixer and the seizure of its infrastructure and cryptocurrency assets. Officials said the service had been used to launder proceeds from ransomware, darknet markets, fraud, trafficking, hacking, and other cybercrime, including funds linked to Lazarus Group activity.
German and Swiss authorities, supported by Europol and Eurojust, carried out Operation Olympia against Cryptomixer from November 24 to 28, 2025. During the action, they seized three servers in Switzerland, took control of the cryptomixer.io domain, confiscated more than 12 TB of data, and seized roughly €25 million to $29 million in bitcoin.
Authorities said Cryptomixer had been active since 2016, offering cryptocurrency mixing services on both the open web and dark web. Investigators later alleged it processed over €1.3 billion to $1.5 billion in bitcoin, much of it tied to criminal activity.
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