Signal
Submitted
Feb 14, 2026, 12:22 UTC
On December 29, 2023, Russian FSB-linked hackers attacked 30 Polish energy facilities, nearly causing a major blackout during cold weather, marking an escalation in Russian cyber sabotage in Europe.
In late December 2023, Poland suffered a significant cyber-attack affecting 30 energy sites, including combined heat and power plants and renewable energy distribution systems, executed by Russian FSB-linked hackers known as 'Berserk Bear'. The attackers gained control of operational technology, inflicting lasting damage and nearly triggering a blackout impacting nearly half a million people amid freezing temperatures. This incident marks a strategic escalation in Russia’s cyber campaign beyond Ukraine, targeting European civilian infrastructure. It follows previous Russian cyber disruptions to railway signaling in Poland and Czech Republic critical for aid routes. Intelligence experts warn of undisclosed Russian footholds in critical infrastructure and potential targets such as international sporting events. Concurrent physical sabotage in Germany was also noted. Analysts assess Russia is increasing hybrid warfare efforts amid geopolitical tensions and upcoming U.S. elections.
Confidence: High
The event explicitly describes Russian FSB-linked hackers conducting aggressive cyber-attacks on Polish energy infrastructure, aiming to cause disruption and damage. There is no described allied defense preparation in the incident.
Source URL
https://archive.ph/X9ud5
Source reliability
F
Info credibility
6
Event time
Dec 29, 2023, 00:00 UTC
Event time confidence
exact
Location
Cyberspace
Primary actor
FSB 'Berserk Bear' hacker unit
Country
Poland
Tags
Russia, Poland, cyberattacks, Energy infrastructure, FSB, Berserk Bear, Operational technology, Cyber sabotage, Hybrid warfare, Critical infrastructure, Cold weather, Railway sabotage, German naval sabotage, Winter Olympics security, Putin risk tolerance, 2028 US election
Nodes
Node 1: Borders