Disclosure context

About everest

Everest is a financially-motivated ransomware group that emerged in September 2021, operating with a focus on profit-driven extortion campaigns against organizations primarily in the United States and Europe. The group's country of origin and specific affiliations remain undocumented in public threat intelligence reporting, though their operational patterns suggest they likely operate as an independent entity rather than a formal ransomware-as-a-service model. Limited public documentation exists regarding Everest's specific attack methodologies, initial access vectors, or technical capabilities, though their victim profile indicates they employ standard ransomware tactics targeting a diverse range of sectors including healthcare, technology, business services, and manufacturing organizations. Since their emergence, Everest has claimed responsibility for attacks against 339 victims across multiple countries, with the United States, United Kingdom, Italy, Germany, and Spain representing their primary geographic targets, though no specific high-profile incidents or major ransoms have been publicly documented by law enforcement or major security firms. As of current reporting, Everest appears to remain an active threat actor, though the limited public intelligence available suggests they operate as a lower-tier ransomware group compared to more prominent and well-documented criminal organizations. The group has been linked to 360 public disclosures across our corpus. First observed on a leak site on September 9, 2021; most recent post May 7, 2026. The operation is currently active.

Timeline of this disclosure

May 7, 2026Rehab Clinics Group Ltd listed by evereston the group's public leak site

Sector and geography

This disclosure adds to ransomware activity in the Healthcare sector, which has 1,779 disclosures indexed across all operators we track. Geographically, Rehab Clinics Group Ltd is reported in GB, a country with 309 ransomware disclosures in our corpus.

How we know this. Darkfield monitors public ransomware leak sites continuously, archiving every new disclosure and the data later released against the victim. Each entry on this page is sourced from the operator's own publication and cross-checked against complementary OSINT feeds (RansomLook, ransomware.live, RansomWatch). We do not collect or host stolen data — only the metadata, timestamps and screenshots needed to make the public disclosure searchable and accountable. Records here are corrected when the original post is edited, retracted, or merged with another disclosure.

Ransomware victim disclosure

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Rehab Clinics Group Ltd

Claimed by everest · listed 13 days ago

13d

Age

since listed · data leaked

Status timeline

Listed
May 7, 2026
Data leaked

At a glance

Group: everest
Status: Data leaked
Country: GB
Sector: Healthcare
Listed on leak site: May 7, 2026

About the victim

AI dossier — public-source company profile

Rehab Clinics Group Ltd is a UK-based healthcare company specialising in rehabilitation and addiction treatment services operating across England. It provides residential and outpatient programmes for individuals dealing with substance misuse, alcohol dependency, and mental health conditions. The company serves both private patients and NHS referrals, offering medically supervised detox, therapy, and aftercare support through a network of treatment centres.

Industry: Rehabilitation & Addiction Treatment Services

Attack summary

Severity: critical — The victim operates in healthcare, handling highly sensitive regulated data including patient PII, medical records, addiction and mental health treatment histories — all of which are special-category data under UK GDPR. The status is data_published, confirming actual exfiltration and public release of this sensitive data at scale.

The Everest ransomware group has claimed an attack on Rehab Clinics Group Ltd with a disclosed status of data_published, indicating that data exfiltration has occurred and data has been published. No specific ransom amount or data size was stated in the post.

critical

Data the group says was taken

AI dossier — extracted from the leak post

Patient personal records
Medical and clinical data
NHS referral information
Substance misuse and addiction treatment records
Mental health records
Aftercare and therapy records

Original description

AI-summarised, not from the leak post

Rehab Clinics Group Ltd is a UK-based healthcare company specialising in rehabilitation and addiction treatment services. Operating across England, it provides residential and outpatient programmes for individuals dealing with substance misuse, alcohol dependency, and mental health conditions. The company works with private patients and NHS referrals, offering medically supervised detox, therapy, and aftercare support through a network of treatment centres.

The leak post

captured from the group's site

© 2026, All rights reserved
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Sources

Leak posthttp://ransomocmou6mnbquqz44ewosbkjk3o5qjsl3orawojexfook2j7esad.onion/news/Rehab_Clinics_Group_Ltd/

Source

Indexed 13 days ago

This page surfaces a public ransomware disclosure indexed by Darkfield. Original posts come from the operator's own leak site; we cross-check against ransomware.live, RansomLook and RansomWatch where applicable. Share this URL freely.