#BREAKING #ESETresearch provides technical details on
#DynoWiper, a data‑wiping malware used in a data‑destruction incident on December 29, 2025, affecting a company in Poland’s energy sector.
https://www.welivesecurity.com/en/eset-research/dynowiper-update-technical-analysis-attribution/ @CERT_Polska_en did an excellent job investigating the incident and published a detailed analysis in a report:
https://cert.pl/en/posts/2026/01/incident-report-energy-sector-2025/ #ESETresearch attributes the attack to the 🇷🇺 Russia‑aligned
#Sandworm APT group with medium confidence, based on strong overlaps in behavior and TTPs with multiple earlier Sandworm attacks. Specifically, DynoWiper operates in a broadly similar fashion to the ZOV wiper, which we attribute to Sandworm with high confidence.
IoCs available in our GitHub repo:
https://github.com/eset/malware-ioc/tree/master/dynowiper