Disclosure context

About Karakurt

Karakurt is a ransomware group that emerged in December 2022, operating primarily as a data extortion threat actor with financial motivations rather than traditional file encryption. The group's origin and affiliations remain largely undocumented by major cybersecurity agencies, though their operational patterns suggest they function as an independent entity rather than a confirmed ransomware-as-a-service operation. Karakurt employs data theft and extortion tactics, focusing on exfiltrating sensitive information from victim networks before demanding payment under threat of public disclosure, representing a pure extortion model that bypasses traditional encryption-based ransomware approaches. The group has targeted 74 known victims across multiple sectors, with particular focus on healthcare, education, manufacturing, energy, and professional services organizations, primarily affecting entities in the United States, United Kingdom, Germany, Singapore, and India. Based on available reporting from established cybersecurity agencies and researchers, Karakurt appears to remain active as of recent assessments, though comprehensive intelligence on their specific attack vectors, tools, and major campaigns remains limited in publicly documented sources from CISA, FBI, and major security research organizations. The group has been linked to 74 public disclosures across our corpus. First observed on a leak site on December 11, 2022; most recent post September 22, 2023. The operation is currently inactive.

Timeline of this disclosure

July 3, 2023Jefferson County Health Center listed by Karakurton the group's public leak site

Data size: 1.1 TB

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, Jefferson County Health Center 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

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Jefferson County Hospital

listed as Jefferson County Health Center · Claimed by Karakurt · listed 3 years ago

1.1 TB

Data size

35m

Age

since listed · data leaked

Status timeline

Listed
Jul 3, 2023
Data leaked

At a glance

Group: Karakurt
Status: Data leaked
Country: United States
Sector: Healthcare
Listed on leak site: Jul 3, 2023
Data size: 1.1 TB

About the victim

AI dossier — public-source company profile

Jefferson County Hospital is a 25-bed critical access facility located in Waurika, Oklahoma, serving residents of Jefferson County and surrounding communities. As a critical access hospital, it provides essential inpatient and outpatient medical services to a rural population. The facility handles medical records, diagnostic testing, and administrative/financial operations.

Industry: Critical Access Hospital / Rural Healthcare
Address: Waurika, Oklahoma, United States

Attack summary

Severity: critical — Confirmed exfiltration of 1.1 TB of regulated healthcare data including patient medical records and PII at scale from a hospital, constituting a likely HIPAA-covered breach of sensitive medical and financial information affecting patients and employees.

Karakurt claims to have exfiltrated approximately 1.1 TB of data from Jefferson County Hospital, including patient medical records, test results, employee and patient personal information, and accounting and financial records, with publication of the data announced for an upcoming summer release.

critical

Data the group says was taken

AI dossier — extracted from the leak post

Patient medical records
Diagnostic test results
Patient personal information (PII)
Employee personal information (PII)
Accounting records
Financial information

What the group claims

Jefferson County Hospital, Waurika, Oklahoma, is a 25-bed critical access facility providing medical services to residents of Jefferson County and surrounding communities. 1.1 TB from the medical facility: medical records, test results, and personal information of employees and patients. Accounting and financial information is abundant. This data will be uploaded during upcoming summer release.

Sources

Leak posthttps://3f7nxkjway3d223j27lyad7v5cgmyaifesycvmwq7i7cbs23lb6llryd.onion/companies/afe404cd-f945-42e6-9417-3e35ccda901f

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.