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Major cyberattack on Serbia’s power utility, suspected Russian-speaking ransomware group claims responsibility.

Serbia’s power company EPS experienced a cyber-security incident in which a Russian-speaking ransomware gang called Qilin claimed to have breached its systems and exfiltrated “a huge part” of the company’s data. The Serbian public and government were reportedly still “in the dark” about the full extent of the attack, the systems affected, and any operational impact. The incident hit Serbia’s domestic critical infrastructure (the national electricity utility) rather than a border zone, maritime approach or physical military target. The dynamics illustrate how hybrid-warfare actors, aligned with Russian strategic posture, may target allied or partner states by going after their power/utility infrastructure, creating disruption risk without visible kinetic action. Although there was no confirmed physical damage announced publicly, the potential for future disruption or cascading outages places this attack within the hybrid-threat domain. The fact that the attacker was a Russian-speaking gang rather than clearly a Russian military unit complicates public attribution, yet the use of Russian language and alignment with Russian-linked threat-actor patterns aligns with the broader Russia-linked hybrid-warfare environment in the Western Balkans.

Occurrence

2023-12-19

Publication

2023-12-18T23:00:00Z

First observed

2026-09-24T06:09:10.079Z

Review status

Not assessed

Countries

RS

Updated

2026-09-27T23:56:59.668Z