Wiper Attack on Polish Power Grid Linked to Russia’s Sandworm
A destructive cyber attack targeting Poland’s energy sector has been linked to Russian APT group Sandworm
Sandworm
GRU Unit 74455 responsible for destructive attacks including NotPetya, attacks on Ukrainian power grid, and Olympic Destroyer. Considered one of the most aggressive threat actors.
Also known as: sandworm, voodoo bear, iridium, seashell blizzard, quedagh, electrum, iron viking, blackenergy group
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ESET Research: Sandworm behind cyberattack on Poland’s power grid in late 2025
The attack involved data-wiping malware that ESET researchers have now analyzed and named DynoWiper