Authorities in Ukraine nab alleged admin of Russian

Officials accuse the unnamed suspect of running XSS.is, a key and long-running marketplace with more than 50,000 registered users. The suspect allegedly made more than $8.2 million.

Ukrainian authorities Tuesday arrested the alleged administrator of XSS.is, a Russian-language cybercrime forum, following a four-year investigation by the Paris public prosecutor’s office. 

Law enforcement officials from France and Europol seized the domain of the influential forum following the arrest. Authorities have not named the suspected administrator of XSS.is.

The forum, which was active since 2013, had more than 50,000 registered users and was a key marketplace for stolen data, malware, access to compromised systems and ransomware services, officials said. “It has long been a central platform for some of the most active and dangerous cybercriminal networks, used to coordinate, advertise and recruit,” Europol said in a news release.

Officials accuse the forum’s administrator of running technical operations and playing a central role in enabling cybercrime. Messages intercepted by authorities during the investigation revealed the suspect made more than $8.2 million in advertising and facilitation fees.

“Investigators believe he has been active in the cybercrime ecosystem for nearly two decades, and maintained close ties to several major threat actors over the years,” Europol said in the new release about the arrest and takedown operation. Authorities also accuse the suspect of running thesecure.biz, a Jabber-powered private messaging service for cybercrime that remains online as of press time.

The cybercrime unit of the Paris public prosecutor’s office opened an investigation into XSS.is in July 2021 and deployed French police investigators on the ground in Ukraine, with Europol’s support, in September 2024. 

The arrest in Kyiv, Ukraine, followed a series of coordinated law enforcement actions, including evidence gathering and the dismantling of the cybercrime forum’s infrastructure. Authorities said data seized during the investigation will be analyzed to support ongoing investigations across Europe and elsewhere.

The Paris public prosecutor’s office said the alleged administrator of XSS.is was identified as part of a wiretap.

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