Was Laboratório Santa Luzia hit by ransomware?

Laboratório Santa Luzia was listed by the thegentlemen ransomware operation (Brazil), 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 thegentlemen ransomware group?

thegentlemen 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 Laboratório Santa Luzia breach?

thegentlemen published data attributed to Laboratório Santa Luzia. Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

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Laboratório Santa Luzia

Claimed by Thegentlemen · listed 2 months ago

54d

Age

since listed · data leaked

Status timeline

ListedApr 19, 2026
Data leakeddate unknown

At a glance

Group: Thegentlemen
Status: Data leaked
Country: Brazil
Sector: Healthcare
Listed on leak site: Apr 19, 2026

About the victim

AI dossier — public-source company profile

Laboratório Santa Luzia is a leading clinical analysis laboratory headquartered in Florianópolis, Brazil, with over 45 years of experience in diagnostic and preventive medicine. It offers more than 2,000 types of medical tests, vaccination services, home collection, and pediatric care across nearly 30 units in the Greater Florianópolis area. The lab also provides corporate health plans, pre-employment exams, and partnerships with clinics, hospitals, and other laboratories.

Industry: Clinical Laboratory & Diagnostic Services
Address: Florianópolis, Santa Catarina, Brazil

Attack summary

Severity: critical — The victim is a large clinical laboratory processing thousands of medical tests across ~30 locations; a confirmed data publication event almost certainly involves regulated health/medical PII (patient diagnostics, vaccination records, pediatric data) at significant scale, meeting the threshold for critical severity.

The group 'thegentlemen' claims an attack on Laboratório Santa Luzia resulting in data publication (disclosed_status: data_published), implying exfiltration of data held by the laboratory. No ransom amount or specific data volume has been stated, but the nature of the victim suggests patient health and diagnostic records are at risk.

critical

Data the group says was taken

AI dossier — extracted from the leak post

Patient medical records
Diagnostic test results
Personal identification information
Corporate health plan data
Pre-employment examination records
Vaccination records
Pediatric care records

What the group claims

sluzia.com.br zoominfo.com/c/laboratório-médico-santa-luzia/430822893 Laboratório Santa Luzia is a leading clinical analysis laboratory based in Florianópolis, Brazil, with over 45 years of experience in diagnostic and preventive medicine. It offers more than 2,000 types of medical tests, vaccination services, home collection, and pediatric care across nearly 30 units in the Greater Florianópolis area. The lab also provides corporate health plans, pre-employment exams, and partnerships with clinics, hospitals, and other labs.

Sources

Victim sitesluzia.com.br

Source

Indexed 2 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 thegentlemen

thegentlemen is a ransomware group that emerged in September 2025, operating with apparent financial motivations based on their broad targeting of commercial sectors. The group has documented 267 victims across multiple countries, with primary focus on the United States, Thailand, France, Brazil, and India. Their targeting strategy demonstrates a preference for high-value sectors including manufacturing, technology, healthcare, and financial services organizations. Given the group's recent emergence and limited public documentation from established threat intelligence sources such as CISA, FBI, or major security research firms, specific details regarding their country of origin, operational structure, attack methodologies, encryption techniques, and whether they employ ransomware-as-a-service models remain unclear. The relatively high victim count of 267 in a short operational timeframe since September 2025 suggests either an aggressive campaign pace or potential inflation of victim numbers through affiliate operations, though without corroborating intelligence reports, the group's exact operational capabilities and notable campaigns cannot be definitively established. Current intelligence indicates the group remains active as of late 2025, though comprehensive threat profiling requires additional validated reporting from authoritative cybersecurity sources. The group has been linked to 483 public disclosures across our corpus. First observed on a leak site on September 9, 2025; most recent post June 11, 2026. The operation is currently active.

Also tracked as: the gentlemen.

Timeline of this disclosure

April 19, 2026Laboratório Santa Luzia listed by thegentlemenon the group's public leak site

Other recent disclosures by thegentlemen

thegentlemen has been linked to 483 public victims on Darkfield. A sample of the most recent:

See the full thegentlemen dossier →

Sector and geography

This disclosure adds to ransomware activity in the Healthcare sector, which has 1,780 disclosures indexed across all operators we track. Geographically, Laboratório Santa Luzia is reported in Brazil, a country with 190 ransomware disclosures in our corpus.

If your organisation is affected

A listing by thegentlemen means Laboratório Santa Luzia 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.
Monitor for the data appearing on thegentlemen'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.