Disclosure context

About qilin

Qilin is a ransomware group that emerged in October 2022, operating with primarily financial motivations through targeted attacks against organizations across multiple sectors. The group appears to operate independently with limited public information available regarding their specific country of origin or affiliations to other ransomware families. Qilin employs double extortion tactics, typically exfiltrating sensitive data before deploying their encryption payload, though specific details about their initial access vectors and technical tools remain less documented in public security research. The group has demonstrated a broad targeting approach, with their 1645 known victims spanning multiple countries including the United States, France, Canada, United Kingdom, and Germany, with particular focus on manufacturing, technology, healthcare, and business services sectors. Based on available intelligence reporting, Qilin remains an active threat as of recent assessments, continuing their ransomware operations without significant reported law enforcement disruption. The group has been linked to 1,858 public disclosures across our corpus. First observed on a leak site on October 8, 2022; most recent post May 21, 2026. The operation is currently active.

Timeline of this disclosure

May 16, 2026CLINICA AVELLANEDA MEDICAL CENTER listed by qilinon 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, CLINICA AVELLANEDA MEDICAL CENTER is reported in AR, a country with 24 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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CLINICA AVELLANEDA MEDICAL CENTER

Claimed by qilin · listed 4 days ago

Age

since listed · data leaked

Status timeline

Listed
May 16, 2026
Data leaked

At a glance

Group: qilin
Status: Data leaked
Country: AR
Sector: Healthcare
Listed on leak site: May 16, 2026

About the victim

AI dossier — public-source company profile

Clinica Avellaneda Medical Center is a medical clinic located in Avellaneda, Buenos Aires Province, Argentina. Based on its name, it provides outpatient and/or inpatient medical services to patients in the greater Buenos Aires metropolitan area. No additional details are available from the public site excerpt.

Industry: Healthcare – Medical Clinic
Address: Avellaneda, Buenos Aires Province, Argentina

Attack summary

Severity: critical — The victim is a healthcare provider in Argentina and the status is 'data_published', meaning sensitive medical and personal data belonging to patients is likely to have been exfiltrated and publicly released, which constitutes a critical breach of regulated health information.

The Qilin ransomware group has claimed an attack against Clinica Avellaneda Medical Center, with the disclosure status recorded as data_published, indicating that stolen data has been released. The specific nature of the exfiltrated data and whether encryption also occurred is not described in the available post.

critical

Data the group says was taken

AI dossier — extracted from the leak post

Patient medical records (probable)
Personal identifying information (probable)
Internal clinical documents (probable)

What the group claims

N/A

The leak post

captured from the group's site

Qilin blog Sorting Created At Name Menzies Group Business Services Company url Zoom Info May 15, 2026 0 photos Learn More Generation Life Insurance Company url Zoom Info May 15, 2026 0 photos Learn More Australian College of Business Intelligence Education Company url Zoom Info May 15, 2026 0 photos Learn More NR Engineering Co., Ltd. Electricity, Oil & Gas Company url May 15, 2026 0 photos Learn More B.Care Medical Center Healthcare Services Company url May 15, 2026 0 photos Learn More Foot Solutions Retail · Pennsylvania Company url Zoom Info May 15, 2026 0 photos Learn More Common Part Groupings Industrial Machinery & Equipment Company url Zoom Info May 15, 2026 0 photos Learn More Cooperativa de Hospitales de Antioquia - COHAN Government Company url Zoom Info May 15, 2026 11 photos 7877165 files 1,500.00 GB Publicated Learn More + 4 more Schulte-Lindhorst GmbH & Co. Business Services Company url Zoom Info May 14, 2026 11 photos Learn More + 4 more Fab-Masters Industrial Machinery & Equipment Company url Zoom Info May 14, 2026 0 photos Learn More Bluize Software Company url Zoom Info May 13, 2026 0 photos Publicated Learn More Domaine Des Tournels Manufacturing Company url May 1…

Sources

Source

Indexed 4 days 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.