Belarusian activist hackers known as the Cyber Partisans have admitted to breaching Moscow's state healthcare network in 2023, confirming their involvement in an intrusion recently disclosed by Russian cybersecurity company Solar. The group said it obtained administrator-level access to the Moscow Department of Health's infrastructure, including systems linked to other government agencies, and spent months inside before abandoning the operation. The claim was reported by Recorded Future News.
The group's account differs from Solar's report. Solar, a subsidiary of state-controlled Rostelecom, said it discovered the breach in December 2025 and traced the earliest signs of intrusion to early 2024, suggesting the hackers may have remained inside the network for nearly two years. The Cyber Partisans say they gained access a year earlier and did not try to maintain it after completing their objectives. Both sides agree the hackers accessed sensitive medical information, though Solar said no data was destroyed or operations disrupted.
The Cyber Partisans did not disclose what information they obtained, but told Recorded Future News that medical data from cyber operations could help assess Russian military casualties in Ukraine. The group emerged after Belarus's disputed 2020 presidential election and has since expanded operations against Russian targets. In July, Russia's Supreme Court designated the group an extremist organization, the first such designation applied to a hacking group.