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

April 30, 2026Liberty Mutual Insurance listed by evereston the group's public leak site

Sector and geography

This disclosure adds to ransomware activity in the Financial Services sector, which has 516 disclosures indexed across all operators we track. Geographically, Liberty Mutual Insurance is reported in US, a country with 2,713 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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Liberty Mutual Insurance

Claimed by everest · listed 20 days ago

20d

Age

since listed · data leaked

Status timeline

Listed
Apr 30, 2026
Data leaked

At a glance

Group: everest
Status: Data leaked
Country: US
Sector: Financial Services
Listed on leak site: Apr 30, 2026

About the victim

AI dossier — public-source company profile

Liberty Mutual Insurance is one of the largest global property and casualty insurers, headquartered in Boston, Massachusetts. Founded in 1912, the company offers personal and commercial lines including auto, home, life, and commercial insurance. It serves customers across the United States and internationally, consistently ranking among the top global insurers by premium revenue.

Industry: Property & Casualty Insurance
Address: 175 Berkeley Street, Boston, Massachusetts 02116, USA
Employees: 45000
Founded: 1912

Attack summary

Severity: critical — Liberty Mutual is a major insurer holding large volumes of regulated PII, financial records, and potentially medical/health-related insurance data at scale across millions of policyholders. The disclosed status is 'data_published', confirming exfiltration and public release of sensitive data from a regulated financial services entity.

The Everest ransomware group claims to have attacked Liberty Mutual Insurance and has published data, indicating exfiltration of company data. The specific nature and volume of exfiltrated data are not detailed in the leak post.

critical

Data the group says was taken

AI dossier — extracted from the leak post

Insurance policyholder records
Personal identifiable information (PII)
Financial records
Commercial insurance data
Internal business documents

Original description

AI-summarised, not from the leak post

Liberty Mutual Insurance is a leading American insurance company headquartered in Boston, Massachusetts. Founded in 1912, it operates in the property and casualty insurance industry, offering products such as auto, home, life, and commercial insurance. The company serves individuals and businesses across the United States and internationally, making it one of the largest global insurers by premium revenue.

The leak post

captured from the group's site

© 2026, All rights reserved
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Sources

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

Source

Indexed 20 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.