Moscow likely behind wiper attack on Poland’s power grid, experts say

ESET attributes a December attempt to compromise Poland’s power companies to Russia’s GRU-linked Sandworm, reporting deployment of DynoWiper wiper malware intended to disrupt communications between renewable hardware and grid operators; the effort failed to cause outages. The report links the activity to Sandworm’s historical use of wipers (CaddyWiper, WhisperGate), notes medium confidence attribution, and places the incident within heightened Poland–Russia tensions and related security measures.