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Unimed

Claimed by Trigona · listed 3 years ago

34m
Age
since listed · data leaked

Status timeline

  1. ListedSep 5, 2023
  2. Data leakeddate unknown

At a glance

Group
Trigona
Status
Data leaked
Country
Brazil
Sector
Healthcare
Listed on leak site
Sep 5, 2023

About the victim

AI dossier — public-source company profile

Unimed is Brazil's largest healthcare cooperative system, founded in 1967, operating as a network of medical cooperatives providing health insurance, hospital services, and medical care across Brazil. It is the country's biggest health plan operator by beneficiaries, with tens of thousands of physician-cooperative members and millions of insured clients. The brand operates through hundreds of regional cooperative affiliates unified under the Unimed brand.

Industry
Healthcare Cooperative & Health Insurance
Employees
10001+
Founded
1967

Attack summary

Severity: critical — Unimed is a major Brazilian healthcare cooperative with millions of patients and beneficiaries; a confirmed data_published status in the healthcare sector almost certainly involves regulated medical and personal health information (PII at scale, medical records), meeting the critical threshold even without a captured leak post.

The Trigona ransomware group claimed an attack against Unimed Brazil and the disclosure status indicates data has been published, though no leak post content was captured to confirm specific claims of encryption or exfiltration.

critical

Data the group says was taken

AI dossier — extracted from the leak post
  • Patient health records (likely)
  • Personally identifiable information (PII)
  • Health insurance beneficiary data
  • Financial/billing records
  • Employee records

Sources

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.

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Disclosure context

About Trigona

Trigona is a relatively new ransomware group that emerged in April 2023, operating with primarily financial motivations and targeting organizations across multiple sectors globally. The group's origin and specific affiliations remain unclear based on publicly available intelligence, though their targeting patterns suggest they operate as an independent entity rather than a established Ransomware-as-a-Service operation. Trigona employs double extortion tactics, combining data encryption with data exfiltration and threats to publish stolen information on leak sites, though specific details about their initial access vectors and encryption methods have not been extensively documented by major security researchers. The group has claimed 49 victims as of current reporting, with their attacks concentrated in the United States, Australia, Mexico, France, and Indonesia, primarily targeting business services, manufacturing, healthcare, technology, and finance sectors. Given the group's recent emergence in 2023, there are no widely reported major campaigns or significant law enforcement actions documented by CISA, FBI, or established threat intelligence firms. Trigona appears to remain active as of current intelligence assessments, though the limited public documentation reflects their relatively recent entry into the ransomware landscape. The group has been linked to 49 public disclosures across our corpus. First observed on a leak site on April 17, 2023; most recent post March 30, 2024. The operation is currently inactive.

Timeline of this disclosure

  • September 5, 2023Unimed listed by Trigonaon the group's public leak site

Other recent disclosures by Trigona

Trigona has been linked to 49 public victims on Darkfield. A sample of the most recent:

See the full Trigona 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, Unimed is reported in Brazil, a country with 404 ransomware disclosures in our corpus.

If your organisation is affected

A listing by Trigona means Unimed 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, CERT.br (Brazil), as required for your jurisdiction.
  • Monitor for the data appearing on Trigona'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.