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 May 16, 2024. The operation is currently inactive.

Timeline of this disclosure

September 5, 2023Unimed listed by Trigonaon 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, Unimed is reported in Brazil, a country with 319 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

Unimed

Claimed by Trigona · listed 3 years ago

32m

Age

since listed · data leaked

Status timeline

Listed
Sep 5, 2023
Data leaked

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

Victim siteunimed.com.br
Leak posthttp://trigonax2zb3fw34rbaap4cqep76zofxs53zakrdgcxzq6xzt24l5lqd.onion/leak/0aa43d36

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.