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Cyber Threat
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Ransomware victim Education

The University of Zagreb Faculty of Science

Listed by Nova on · organisation based in Croatia

pmf.unizg.hr

Disclosed
Jul 2, 2025
Leak-site listing date
Threat group
Nova
194 victims listed
Country
Croatia
#53 most targeted
Sector
Education

ThreatAI analysis

Compiled from this incident record and the threat intelligence profile for Nova. Figures and technique mappings are quoted from the source data, not inferred.

About the Nova group

Nova (formerly RALord) is a ransomware-as-a-service (RaaS) group that encrypts victims’files and uses double-extortion tactics to pressure organizations into paying for decryption and data non-disclosure. Nova has listed 178 victims since March 2025.

Incident analysis

The University of Zagreb Faculty of Science was listed by Nova ransomware, a group with 194 victims recorded in this database. The listing appeared on the group's leak site on July 2, 2025.

The University of Zagreb Faculty of Science is based in Croatia and operates in the Education sector. Croatia ranks #53 worldwide for ransomware disclosures, with 30 victims in this database.

Sector context. Educational institutions often have under-resourced IT security teams and hold large amounts of student and faculty personal data, making them attractive targets for ransomware groups.

Nova typically follows a double extortion model: data is exfiltrated from the victim's systems before files are encrypted, so the victim faces two demands at once — pay to restore access, and pay to keep stolen data unpublished. The leak site, where this listing appeared, is the lever for the second demand.

Source. Public leak-site disclosures aggregated via the ransomware.live API. The disclosure date is when the listing was published, which can differ from the date of compromise. This site does not publish or link to stolen data. Last updated .

Frequently asked questions

Was The University of Zagreb Faculty of Science attacked by ransomware?

Yes. The University of Zagreb Faculty of Science was listed as a victim of the Nova ransomware group on July 2, 2025. The organisation is based in Croatia and operates in the Education sector. The disclosure appeared on the group's dark web leak site.

Which ransomware group attacked The University of Zagreb Faculty of Science?

The University of Zagreb Faculty of Science was attacked by Nova ransomware. Nova is one of the most active ransomware groups, having claimed 194 victims globally. The group typically employs a double-extortion model: encrypting the victim's files and threatening to publish stolen data.

When did the The University of Zagreb Faculty of Science ransomware attack occur?

The ransomware attack on The University of Zagreb Faculty of Science was disclosed on July 2, 2025. This date reflects when the victim was published on the threat group's leak site, which may differ from the actual date of initial compromise.

What data was stolen in the The University of Zagreb Faculty of Science ransomware attack?

The specific data stolen from The University of Zagreb Faculty of Science has not been independently verified by this platform. Ransomware groups typically exfiltrate data before encrypting systems and use the threat of publication to pressure victims. As a Education organisation, The University of Zagreb Faculty of Science likely held student and faculty personal data and academic records.

How can organisations protect against Nova attacks?

To defend against Nova and similar threat actors, organisations should: maintain regular offline backups tested for restoration; implement network segmentation to limit lateral movement; deploy multi-factor authentication on all remote access; use endpoint detection and response (EDR) tools; conduct regular phishing and security awareness training; and monitor threat intelligence feeds for indicators of compromise (IOCs) associated with active groups.