Was Pacific HealthWorks hit by ransomware?

Pacific HealthWorks was listed by the Everest ransomware operation (United States), and stolen data was published on the group's leak site. Darkfield tracks this disclosure with the original leak post, screenshot and group context.

Who is the Everest ransomware group?

Everest is a ransomware operator tracked by Darkfield. See the full operator dossier for its known victims, sectors targeted, IOCs and leak-site infrastructure.

What data was leaked in the Pacific HealthWorks breach?

Everest published data attributed to Pacific HealthWorks. Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

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Pacific HealthWorks

Claimed by Everest · listed 11 months ago

11m

Age

since listed · data leaked

Status timeline

ListedAug 8, 2025
Data leakeddate unknown

At a glance

Group: Everest
Status: Data leaked
Country: United States
Sector: Healthcare
Listed on leak site: Aug 8, 2025

About the victim

AI dossier — public-source company profile

Pacific HealthWorks is a physician practice management company based in El Segundo, California, providing management and administrative services to healthcare practitioners and facilities across the Western United States. The company manages over 70 entities, contracts with over 1,200 providers, and processes over 1.4 million patient encounters annually, offering services including revenue cycle management, practice management, physician support, and analytics.

Industry: Healthcare Management Services / Physician Practice Management
Address: 898 N. Pacific Coast Highway, Suite #600, El Segundo, CA 90245, United States
Employees: 51-200
Founded: 2009

Attack summary

Severity: critical — Healthcare MSO with access to protected health information (PHI) for 1,200+ providers and 1.4M+ annual patient encounters. Confirmed data publication by ransomware group. Breach of healthcare management company likely exposes regulated medical data at scale, affecting multiple medical practices and patients.

The Everest group claims to have compromised Pacific HealthWorks and published exfiltrated data. The specific data types and operational impact are not detailed in the available leak post excerpt.

critical

Data the group says was taken

AI dossier — extracted from the leak post

Practice management records
Provider information
Patient encounter data
Billing and revenue cycle data
Administrative records
Credentialing documents

Original description

AI-summarised, not from the leak post

Pacific HealthWorks is a management services organization based in Los Angeles, United States. The company primarily provides comprehensive management, administrative, and support services to healthcare practitioners and facilities, including doctors’ offices, healthcare clinics, and other related medical entities. They focus on business and operational aspects so the medical professionals can concentrate on patient care.

Sources

Victim sitepacifichealthworks.com
Leak posthttp://ransomocmou6mnbquqz44ewosbkjk3o5qjsl3orawojexfook2j7esad.onion/news/Pacific

Source

Indexed 11 months 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.

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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 369 public disclosures across our corpus. First observed on a leak site on September 9, 2021; most recent post May 29, 2026. The operation is currently active.

Timeline of this disclosure

August 8, 2025Pacific HealthWorks listed by Evereston the group's public leak site

Other recent disclosures by Everest

Everest has been linked to 369 public victims on Darkfield. A sample of the most recent:

See the full Everest dossier →

Sector and geography

This disclosure adds to ransomware activity in the Healthcare sector, which has 2,600 disclosures indexed across all operators we track. Geographically, Pacific HealthWorks is reported in United States, a country with 11,033 ransomware disclosures in our corpus.

If your organisation is affected

A listing by Everest means Pacific HealthWorks appeared on a ransomware extortion site and data attributed to it has been published. If this is your organisation, or a supplier you depend on, the priority is to confirm the intrusion and contain it before the window to act closes.

Engage your incident-response team and preserve forensic evidence before remediating — do not wipe affected systems first.
Force a password reset and revoke active sessions for exposed accounts; rotate any credentials, API keys or certificates that may have been in the stolen data.
Assess regulatory notification duties (GDPR, NIS2, sector regulators) — many carry a 72-hour reporting clock from awareness.
Report the incident to your national CERT, CISA (United States), as required for your jurisdiction.
Monitor for the data appearing on Everest's leak site and across paste and breach channels, and brief downstream partners who may be exposed through you.

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.