Cyber Threat Intelligence
Today In Cyber Sponsor Today In Cyber
CO
Ransomware Victim Education

Colégio Nova Dimensão

Ransomware attack by Arcusmedia · Disclosed May 18, 2024 · 🇧🇷 Brazil

colegiond.com.br/

Date Disclosed
May 18, 2024
2024
Threat Group
Arcusmedia
98 total victims
Country
🇧🇷 Brazil
Industry
Education

Incident Analysis

Colégio Nova Dimensão was targeted by Arcusmedia ransomware, one of the most active ransomware groups in our database with 98 confirmed victims globally. The attack was disclosed on May 18, 2024, when Colégio Nova Dimensão appeared on the group's dark web leak site.

Colégio Nova Dimensão is based in Brazil , operating in the Education sector. Brazil ranks #9 globally for ransomware attacks, with 368 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.

Arcusmedia 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: Jun 13, 2026 06:01 UTC.

Frequently Asked Questions

Was Colégio Nova Dimensão attacked by ransomware?

Yes. Colégio Nova Dimensão was listed as a victim of the Arcusmedia ransomware group on May 18, 2024. 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 Colégio Nova Dimensão?

Colégio Nova Dimensão was attacked by Arcusmedia ransomware. Arcusmedia is one of the most active ransomware groups, having claimed 98 victims globally. The group typically employs a double-extortion model: encrypting the victim's files and threatening to publish stolen data.

When did the Colégio Nova Dimensão ransomware attack occur?

The ransomware attack on Colégio Nova Dimensão was disclosed on May 18, 2024. 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 Colégio Nova Dimensão ransomware attack?

The specific data stolen from Colégio Nova Dimensão 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, Colégio Nova Dimensão likely held student and faculty personal data and academic records.

How can organisations protect against Arcusmedia attacks?

To defend against Arcusmedia 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.