Cyber Threat Intelligence
CTI Academy Sponsor CTI Academy
ME
Ransomware Victim Education

Melland High

Ransomware attack by Kairos · Disclosed December 15, 2025 · 🇺🇸 United States

mellandhigh.co.uk

Date Disclosed
Dec 15, 2025
2025
Threat Group
Kairos
97 total victims
Country
🇺🇸 United States
Industry
Education

ThreatAI Analysis

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

About the Kairos group

Kairos is a data extortion group active since late 2024 that focuses solely on data theft with no encryption, primarily targeting small-to-mid-sized organizations in healthcare, manufacturing, and business services in the US, purchasing initial access from brokers and demanding Bitcoin payments. Kairos has listed 95 victims since June 2024.

Incident Analysis

Melland High was targeted by Kairos ransomware, one of the most active ransomware groups in our database with 97 confirmed victims globally. The attack was disclosed on December 15, 2025, when Melland High appeared on the group's dark web leak site.

Melland High is based in United States , operating in the Education sector. United States ranks #1 globally for ransomware attacks, with 9,519 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.

Kairos 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 18, 2026 00:00 UTC.

Frequently Asked Questions

Was Melland High attacked by ransomware?

Yes. Melland High was listed as a victim of the Kairos ransomware group on December 15, 2025. The organisation is based in United States and operates in the Education sector. The disclosure appeared on the group's dark web leak site.

Which ransomware group attacked Melland High?

Melland High was attacked by Kairos ransomware. Kairos is one of the most active ransomware groups, having claimed 97 victims globally. The group typically employs a double-extortion model: encrypting the victim's files and threatening to publish stolen data.

When did the Melland High ransomware attack occur?

The ransomware attack on Melland High was disclosed on December 15, 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 Melland High ransomware attack?

The specific data stolen from Melland High 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, Melland High likely held student and faculty personal data and academic records.

How can organisations protect against Kairos attacks?

To defend against Kairos 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.