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Ransomware Victim Healthcare

Adelphi

Ransomware attack by Worldleaks · Disclosed February 17, 2026 · 🇬🇧 United Kingdom

adelphi.uk.com

Date Disclosed
Feb 17, 2026
2026
Threat Group
Worldleaks
177 total victims
Country
🇬🇧 United Kingdom
Industry
Healthcare

ThreatAI Analysis

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

About the Worldleaks group

World Leaks emerged in January 2025 as a rebrand of the Hunters International ransomware operation, shifting its focus from file encryption to solely stealing sensitive data and threatening to leak it unless a ransom is paid Worldleaks has listed 174 victims since June 2022.

Incident Analysis

Adelphi was targeted by Worldleaks ransomware, one of the most active ransomware groups in our database with 177 confirmed victims globally. The attack was disclosed on February 17, 2026, when Adelphi appeared on the group's dark web leak site.

Adelphi is based in United Kingdom , operating in the Healthcare sector. United Kingdom ranks #4 globally for ransomware attacks, with 903 victims in our database.

Sector context: Healthcare organisations are high-value ransomware targets because patient data is extremely sensitive, regulatory penalties for breaches are severe, and operational downtime can threaten patient safety — all factors that increase ransom payment pressure.

Worldleaks 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 22, 2026 04:00 UTC.

Frequently Asked Questions

Was Adelphi attacked by ransomware?

Yes. Adelphi was listed as a victim of the Worldleaks ransomware group on February 17, 2026. The organisation is based in United Kingdom and operates in the Healthcare sector. The disclosure appeared on the group's dark web leak site.

Which ransomware group attacked Adelphi?

Adelphi was attacked by Worldleaks ransomware. Worldleaks is one of the most active ransomware groups, having claimed 177 victims globally. The group typically employs a double-extortion model: encrypting the victim's files and threatening to publish stolen data.

When did the Adelphi ransomware attack occur?

The ransomware attack on Adelphi was disclosed on February 17, 2026. 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 Adelphi ransomware attack?

The specific data stolen from Adelphi 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 Healthcare organisation, Adelphi likely held patient records, medical data, and personally identifiable information (PII).

How can organisations protect against Worldleaks attacks?

To defend against Worldleaks 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.