Ransomware Attack at Slovenian Power Company HSE

January 30, 2024


Slovenian power company Holding Slovenske Elektrarne (HSE) has suffered a ransomware attack that compromised its systems and encrypted files, yet the company says the incident did not disrupt electric power production. HSE is Slovenia's largest power generation company, accounting for roughly 60% of domestic production, and it is considered critical infrastructure in the country. No ransom demand has been received.

The attack did affect the company’s communication and information infrastructure and, according to Slovenian news outlet 24ur, the websites of some of the power plants were temporarily inaccessible. Unofficial information shared with local media attributes the attack to the Rhysida ransomware gang. If Rhysida is behind the attack, it would also explain why HSE is stating they did not receive a ransom demand, as Rhysida ransom notes only contain an email address to contact the threat actors without specifying any monetary demands.

Incident Date

November 24, 2023



Estimated Cost

No cost values disclosed.

Type of Malware

No Malware identified