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Ransomware Victim Education

EUC Sjlland

Ransomware attack by Ransomhouse ยท Disclosed June 9, 2025 ยท ๐Ÿ‡ฉ๐Ÿ‡ฐ Denmark

eucsj.dk

Date Disclosed
Jun 9, 2025
2025
Threat Group
Ransomhouse
140 total victims
Country
๐Ÿ‡ฉ๐Ÿ‡ฐ Denmark
Industry
Education

Incident Analysis

EUC Sjlland was targeted by Ransomhouse ransomware, one of the most active ransomware groups in our database with 140 confirmed victims globally. The attack was disclosed on June 9, 2025, when EUC Sjlland appeared on the group's dark web leak site.

EUC Sjlland is based in Denmark , operating in the Education sector. Denmark ranks #37 globally for ransomware attacks, with 62 victims in our 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.

Ransomhouse typically employs a double extortion model: first exfiltrating sensitive data from the victim's systems, then deploying ransomware to encrypt files. Victims face two simultaneous threats โ€” paying to restore access and paying to prevent publication of stolen data. The group's leak site publishes victim names and exfiltrated data as leverage.

Data source: This incident record is sourced from public ransomware group leak site disclosures aggregated via the ransomware.live API. Disclosure date reflects when the victim was published on the leak site, which may differ from the initial date of compromise. This platform does not publish or link to stolen data. Last data update: Aug 1, 2026 06:00 UTC.

Frequently Asked Questions

Was EUC Sjlland attacked by ransomware?

Yes. EUC Sjlland was listed as a victim of the Ransomhouse ransomware group on June 9, 2025. The organisation is based in Denmark and operates in the Education sector. The disclosure appeared on the group's dark web leak site.

Which ransomware group attacked EUC Sjlland?

EUC Sjlland was attacked by Ransomhouse ransomware. Ransomhouse is one of the most active ransomware groups, having claimed 140 victims globally. The group typically employs a double-extortion model: encrypting the victim's files and threatening to publish stolen data.

When did the EUC Sjlland ransomware attack occur?

The ransomware attack on EUC Sjlland was disclosed on June 9, 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 EUC Sjlland ransomware attack?

The specific data stolen from EUC Sjlland 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, EUC Sjlland likely held student and faculty personal data and academic records.

How can organisations protect against Ransomhouse attacks?

To defend against Ransomhouse 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.