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Ransomware Victim Education

uva.edu.br

Ransomware attack by J · Disclosed May 2, 2025 · 🇧🇷 Brazil

uva.edu.br

Date Disclosed
May 2, 2025
2025
Threat Group
J
41 total victims
Country
🇧🇷 Brazil
Industry
Education

ThreatAI Analysis

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

About the J group

J is an emerging ransomware group that launched its leak site in May 2025, claiming over 41 victims by late 2025 including FAI Aviation Group (Germany), operating primarily as a leak-site-centric extortion identity with limited public technical analysis. J has listed 41 victims since February 2025.

Incident Analysis

uva.edu.br was targeted by J ransomware, one of the most active ransomware groups in our database with 41 confirmed victims globally. The attack was disclosed on May 2, 2025, when uva.edu.br appeared on the group's dark web leak site.

uva.edu.br is based in Brazil , operating in the Education sector. Brazil ranks #7 globally for ransomware attacks, with 447 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.

J 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 — 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: Sep 7, 2026 02:00 UTC.

Frequently Asked Questions

Was uva.edu.br attacked by ransomware?

Yes. uva.edu.br was listed as a victim of the J ransomware group on May 2, 2025. The organisation is based in Brazil and operates in the Education sector. The disclosure appeared on the group's dark web leak site.

Which ransomware group attacked uva.edu.br?

uva.edu.br was attacked by J ransomware. J is one of the most active ransomware groups, having claimed 41 victims globally. The group typically employs a double-extortion model: encrypting the victim's files and threatening to publish stolen data.

When did the uva.edu.br ransomware attack occur?

The ransomware attack on uva.edu.br was disclosed on May 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 uva.edu.br ransomware attack?

The specific data stolen from uva.edu.br 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, uva.edu.br likely held student and faculty personal data and academic records.

How can organisations protect against J attacks?

To defend against J 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.