Lyce · Hybrid Watch

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Hacker attack on Swedish electricity grid operator.

Swedish power grid operator Svenska Kraftnät experienced a data breach on October 25, 2025, when ransomware group Everest accessed an external file-transfer system and claimed to have stolen roughly 280 GB of data. Electricity transmission operations were not affected.

Occurrence
2025-10-25
Publication
2025-10-25T12:16:33Z
First observed
2026-09-24T06:09:10.079Z
Review status
Not assessed
Countries
SE
Updated
2026-09-27T23:56:59.668Z

E/M/R/S scores

  • EExistence0/4 · Not assessed
  • MIntent0/4 · Not assessed
  • RRussian actor link0/4 · Not assessed
  • SRussian state responsibility0/4 · Not assessed

Facts

No facts

Sources

  1. Role
    discovery_lead
    Date
    2025-10-25T12:16:33Z

    Swedish power grid operator Svenska Kraftnät experienced a data breach on October 25, 2025, when ransomware group Everest accessed an external file-transfer system and claimed to have stolen roughly 280 GB of data. Electricity transmission operations were not affected.