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... The Russian state-sponsored APT named Sandworm was behind the December 2025 cyberattack targeting Poland's power grid, cybersecurity firm ESET reports.

Poland's energy infrastructure, including two combined heat and power (CHP) plants and a renewable energy management system, was targeted by hackers on December 29-30, and Polish officials blamed Russia for the assault.

Said to have been the largest cyberattack against Poland in years, the December 2025 incident was thwarted before it could cause a blackout or compromise critical infrastructure, the country's officials said earlier this month. ,,,