Disclosure context

About Nokoyawa

Nokoyawa is a ransomware group that emerged in December 2022, operating with primarily financial motivations and targeting organizations across multiple sectors including healthcare, non-profit, education, finance, and energy. The group has claimed at least 36 victims since its emergence, with attacks predominantly focused on the United States, Canada, United Kingdom, France, and the Philippines. While detailed technical analysis of Nokoyawa's operations remains limited in public reporting, the group appears to follow conventional ransomware tactics targeting critical infrastructure and essential services sectors. Their targeting of healthcare and educational institutions suggests they operate without the sector restrictions that some other ransomware groups have adopted. Notable campaigns include attacks across their preferred geographic regions, though specific high-profile incidents have not been extensively documented in public threat intelligence reporting from major security firms. As of current reporting, Nokoyawa appears to remain an active threat, though the group's relatively recent emergence means long-term operational patterns and potential law enforcement disruption efforts are still developing. The group has been linked to 36 public disclosures across our corpus. First observed on a leak site on December 9, 2022; most recent post October 8, 2023. The operation is currently inactive.

Timeline of this disclosure

May 23, 2023Wyoming County Community Health System listed by Nokoyawaon 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, Wyoming County Community Health System is reported in United States, a country with 7,392 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

← All victims

Wyoming County Community Health System

Claimed by Nokoyawa · listed 3 years ago

36m

Age

since listed · data leaked

Status timeline

Listed
May 23, 2023
Data leaked

At a glance

Group: Nokoyawa
Status: Data leaked
Country: United States
Sector: Healthcare
Listed on leak site: May 23, 2023

About the victim

AI dossier — public-source company profile

Wyoming County Community Health System (WCCHS) is a full-service, county-owned health system that has been serving Wyoming County and the surrounding rural area in New York State for over 110 years. It operates a 62-bed hospital along with associated community health services. As a county-owned entity, it serves as a critical healthcare provider for a rural population.

Industry: Rural Community Healthcare
Address: Warsaw, New York, United States
Employees: 201-500
Founded: 1910

Attack summary

Severity: critical — The victim is a county-owned hospital and community health system operating in healthcare, where exfiltrated data almost certainly includes protected health information (PHI) and PII at scale. The disclosed status is 'data_published', confirming actual data release, meeting the critical threshold for regulated medical data exfiltration.

The Nokoyawa ransomware group claims to have compromised Wyoming County Community Health System and has published data as indicated by the 'data_published' disclosure status, suggesting exfiltration of data from this rural county-owned healthcare provider.

critical

Data the group says was taken

AI dossier — extracted from the leak post

Patient health records
Personal identifiable information (PII)
Medical records
Financial records
Employee data
County government healthcare data

What the group claims

Wyoming County Community Health System has been serving Wyoming County and the surrounding area for over 110 years and continues its commitment of providing outstanding healthcare services for our rural community.WCCHS, a full service, County-owned health system comprised of a 62-bed...

Sources

Victim sitewcchs.net/
Leak posthttp://nokoleakb76znymx443veg4n6fytx6spck6pc7nkr4dvfuygpub6jsid.onion/leak/645e905348843000772d5cdf

Source

Indexed 3 years 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.