Was Northwest Medical Specialties hit by ransomware?

Northwest Medical Specialties was listed by the worldleaks 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 worldleaks ransomware group?

worldleaks 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 Northwest Medical Specialties breach?

worldleaks published data attributed to Northwest Medical Specialties. Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

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Northwest Medical Specialties

Claimed by Worldleaks · listed 10 months ago

10m

Age

since listed · data leaked

Status timeline

ListedSep 11, 2025
Data leakeddate unknown

At a glance

Group: Worldleaks
Status: Data leaked
Country: United States
Sector: Healthcare
Listed on leak site: Sep 11, 2025

About the victim

AI dossier — public-source company profile

Northwest Medical Specialties (NWMS) is a leading cancer care provider headquartered in Tacoma, Washington, operating multiple locations across the Puget Sound region including Puyallup, Gig Harbor, Federal Way, Bonney Lake, and Olympia. Founded in 1985, NWMS offers medical oncology, hematology, laboratory, infusion, cell and gene therapy, and precision medicine services, staffed by board-certified oncologists and hematologists. The organization is accredited by the QOPI Certification Program for exceptional oncology patient care.

Industry: Oncology & Hematology Medical Practice
Address: Tacoma, Washington, United States
Founded: 1985

Attack summary

Severity: critical — The victim is an oncology and hematology medical practice handling highly sensitive regulated patient health information (PHI/PII) including cancer diagnoses and treatment records; data_published status indicates confirmed exfiltration of medical data at scale, which constitutes a critical HIPAA-regulated breach.

The worldleaks group claims a data publication (disclosed status: data_published) against Northwest Medical Specialties, indicating exfiltration of data from this oncology and hematology healthcare provider. No ransom amount or specific data size was stated in the post.

critical

Data the group says was taken

AI dossier — extracted from the leak post

Patient health records (PHI)
Medical records
Insurance and billing information
Clinical trial data
Patient personally identifiable information (PII)
Staff and provider information

Original description

AI-summarised, not from the leak post

Northwest Medical Specialties (NWMS) is a healthcare organization based in Tacoma, Washington. It provides holistic treatment for patients, particularly in areas such as oncology, hematology, and infectious diseases. Known for its focus on innovative care, NWMS utilizes research and advanced technologies to tailor solutions to individual patient needs. It has been accredited by QOPI Certification Program for its exceptional oncology patient care.

Sources

Victim sitewww.nwmedicalspecialties.com
Leak posthttps://worldleaksartrjm3c6vasllvgacbi5u3mgzkluehrzhk2jz4taufuid.onion/companies/7274691569

Source

Indexed 10 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 worldleaks

Based on the limited available data, worldleaks is a recently emerged ransomware group that was first observed in May 2025 and appears to be primarily financially motivated, having claimed 134 victims in a relatively short timeframe since its emergence. The group's origin and organizational structure remain unclear, with no publicly documented information from major cybersecurity firms or law enforcement agencies regarding their country of origin, potential affiliations, or operational model. Their targeting patterns indicate a focus on English-speaking countries, particularly the United States, United Kingdom, and Canada, with additional activity observed in Germany and Japan, while their sector targeting shows a preference for healthcare, technology, manufacturing, and consumer services organizations. Due to the group's recent emergence and limited public documentation by established threat intelligence sources, specific details about their attack methodologies, encryption techniques, extortion tactics, and notable campaigns have not yet been comprehensively analyzed or reported by organizations such as CISA, FBI, or major cybersecurity research firms. The group appears to remain active as of the most recent observations, though comprehensive threat intelligence profiling awaits further analysis and documentation by established cybersecurity authorities. The group has been linked to 173 public disclosures across our corpus. First observed on a leak site on May 18, 2025; most recent post July 2, 2026. The operation is currently active.

Timeline of this disclosure

September 11, 2025Northwest Medical Specialties listed by worldleakson the group's public leak site

Other recent disclosures by worldleaks

worldleaks has been linked to 173 public victims on Darkfield. A sample of the most recent:

See the full worldleaks 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, Northwest Medical Specialties is reported in United States, a country with 11,033 ransomware disclosures in our corpus.

If your organisation is affected

A listing by worldleaks means Northwest Medical Specialties 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 worldleaks'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.