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Centro Médico Especializado OSI

listed as Centro Médico Especializado OSI: Healthcare Solutions · Claimed by Kazu · listed 16 hours ago

Today
Age
since listed · data leaked

Status timeline

  1. ListedAug 23, 2026
  2. Data leakeddate unknown

At a glance

Group
Kazu
Status
Data leaked
Country
Mexico
Sector
Healthcare
Listed on leak site
Aug 23, 2026

About the victim

AI dossier — public-source company profile

Centro Médico Especializado OSI is a Peruvian healthcare provider founded in 1999 and headquartered in Lima, specializing in physical medicine, rehabilitation, physiotherapy, chiropractic care, acupuncture, and alternative medicine. It operates 10 clinics across the Lima metropolitan area and employs medical specialists and licensed physical therapists treating conditions including spinal pain, arthritis, and post-injury recovery.

Industry
Healthcare – Physical Medicine, Rehabilitation & Physiotherapy
Address
Multiple locations in Lima, Peru (10 clinics: Callao–Minka, Jesús María, La Molina, Los Olivos, Magdalena, Miraflores, San Miguel, Surco–Chacarilla, Surco–El Trigal, Surquillo)
Founded
1999

Attack summary

Severity: high — Healthcare provider with patient data exfiltration (PII at scale and medical records), meeting critical sensitivity thresholds. Data published and no proof count advertised suggests the group may not have comprehensive proof or is still negotiating, reducing confidence slightly from 'critical' but the regulated healthcare data context remains severe.

The kazu group claims to have attacked Centro Médico Especializado OSI and exfiltrated data. The leak post provides no detail on the scope of exfiltration, what data categories were taken, or the group's demands.

high

Data the group says was taken

AI dossier — extracted from the leak post
  • Patient medical records
  • Personal identifiable information
  • Treatment history

What the group claims

Centro Médico Especializado OSI is a healthcare provider based in Peru that specializes in physical medicine, rehabilitation, physiotherapy, chiropractic care, and alternative medicine treatments. Founded in 1999 and headquartered in Lima, OSI has grown into one of the country's largest rehabilitation and physiotherapy networks, operating multiple clinics across the Lima metropolitan area. wellness network in Peru, focused on helping patients recover mobility, reduce pain, and improve their quality of life through specialized medical and therapeutic care.

Sources

Source

Indexed 16 hours 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 kazu

The Kazu ransomware group is a relatively new threat actor that emerged in November 2025, operating with apparent financial motivations based on their targeting patterns across multiple sectors and geographic regions. Given their recent emergence and limited public documentation, details about their country of origin and potential affiliations remain unclear, though their targeting of diverse international victims suggests either a ransomware-as-a-service model or an independent operation with broad reach capabilities. With only nine documented victims to date, specific details about Kazu's attack methodology, initial access vectors, and encryption techniques have not been extensively documented by major threat intelligence organizations, though their targeting spans healthcare, public sector, financial services, and technology organizations across the United States, Colombia, South Africa, Nigeria, and Great Britain. The group's recent emergence means there are no widely reported major campaigns or high-profile incidents documented by established security research organizations like Mandiant, CISA, or the FBI. As of the latest available intelligence, Kazu appears to remain active given their very recent first observation date, though their limited victim count and recent emergence make definitive assessments of their operational status preliminary. The group has been linked to 23 public disclosures across our corpus. First observed on a leak site on November 11, 2025; most recent post August 23, 2026. The operation is currently active.

Timeline of this disclosure

  • August 23, 2026Centro Médico Especializado OSI: Healthcare Solutions listed by kazuon the group's public leak site

Other recent disclosures by kazu

kazu has been linked to 23 public victims on Darkfield. A sample of the most recent:

See the full kazu dossier →

Sector and geography

This disclosure adds to ransomware activity in the Healthcare sector, which has 2,608 disclosures indexed across all operators we track. Geographically, Centro Médico Especializado OSI: Healthcare Solutions is reported in Mexico, a country with 71 ransomware disclosures in our corpus.

If your organisation is affected

A listing by kazu means Centro Médico Especializado OSI: Healthcare Solutions 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-MX (Mexico), as required for your jurisdiction.
  • Monitor for the data appearing on kazu'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.