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SIA Medical Centre

Claimed by Rhysida · listed 4 days ago

4d
Age
since listed · data leaked

Status timeline

  1. ListedAug 13, 2026
  2. Data leakeddate unknown

At a glance

Group
Rhysida
Status
Data leaked
Country
Latvia
Sector
Healthcare
Listed on leak site
Aug 13, 2026

About the victim

AI dossier — public-source company profile

SIA Medical Centre is a multi-clinic healthcare provider established in 1993 by Dr Martin Sia in Melbourne's northwest. Operating 9 clinics across the greater Melbourne area, the organization provides medical services including gynaecology, obstetrics, and haematology.

Industry
Healthcare & Medical Clinics
Address
Multiple locations: Box Hill, Burwood, Croydon, Essendon, Footscray, Moonee Ponds, Montrose, Mulgrave and Berwick, Melbourne, Victoria, Australia
Founded
1993

Attack summary

Severity: critical — Confirmed exfiltration of large-scale regulated healthcare data including ~20,000 patient medical records with PII (names, dates of birth, Medicare numbers, clinical notes), staff identity documents, and plaintext system credentials. This constitutes exposure of protected health information under Australian privacy law.

Rhysida claims to have exfiltrated approximately 20,000 patient medical records, staff identity documents, plaintext system credentials, HR records, and legal and financial documents from SIA Medical Centre. The group is offering the data for sale with claims of exclusivity.

critical

Data the group says was taken

AI dossier — extracted from the leak post
  • Patient medical records (~20,000)
  • Patient names and dates of birth
  • Medicare numbers
  • Clinical notes
  • Insurance and work-cover files
  • Staff identity documents (passports, driver's licenses)
  • Police checks
  • Tax file declarations
  • Plaintext system credentials (Synapse imaging, PRODA, terminal server, doctor accounts)
  • Employment contracts
  • Staff incident reports
  • Immunisation registers
  • Subpoenas and complaints
  • Bupa contracts
  • Bank details (BSB/ABN)
  • Provider payment forms

What the group claims

SIA Medical Centre SIA Medical was established in 1993 and was founded by Dr Martin Sia in Melbourne's northwest. 9 clinics - Box Hill, Burwood, Croydon, Essendon, Footscray, Moonee Ponds, Montrose, Mulgrave and Berwick.We are pleased to present:~20,000 patient medical records - names, dates of birth, Medicare numbers, clinical notes, insurance and work-cover files, full patient dossiersStaff identity documents - passports, driver's licenses, police checks, tax file declarations of doctors and employeesPlaintext credentials - logins and passwords for clinical systems (Synapse imaging, PRODA, terminal server, doctor accounts)HR records - signed employment contracts, staff incident reports, immunisation registersLegal & financial - subpoenas, complaints, Bupa contracts, bank details (BSB/ABN), provider payment forms More

The leak post

captured from the group's site
SIA Medical was established in 1993 and was founded by Dr Martin Sia in Melbourne's northwest. 9 clinics - Box Hill, Burwood, Croydon, Essendon, Footscray, Moonee Ponds, Montrose, Mulgrave and Berwick.**We are pleased to present:** ~20,000 patient medical records - names, dates of birth, Medicare numbers, clinical notes, insurance and work-cover files, full patient dossiersStaff identity documents - passports, driver's licenses, police checks, tax file declarations of doctors and employeesPlaintext credentials - logins and passwords for clinical systems (Synapse imaging, PRODA, terminal server, doctor accounts)HR records - signed employment contracts, staff incident reports, immunisation registersLegal & financial - subpoenas, complaints, Bupa contracts, bank details (BSB/ABN), provider payment forms
With just 7 days on the clock, seize the opportunity to bid on exclusive, unique, and impressive data. Open your wallets and be ready to buy exclusive data. We sell only to one hand, no reselling, you will be the only owner!
SaiMed Specialist Centre is a consulting facility that focuses on Gynaecology, Obstetrics, and Haematology services.

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.

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Disclosure context

About Rhysida

Rhysida is a ransomware group that emerged in June 2023, operating with primarily financial motivations through targeted attacks against critical infrastructure and public sector organizations. The group's origin and potential state affiliations remain unclear, though they operate independently rather than as a traditional Ransomware-as-a-Service model, with limited public documentation regarding connections to other cybercriminal organizations. Rhysida employs double extortion tactics, typically gaining initial access through compromised VPN credentials and exploiting vulnerable public-facing applications before deploying their ransomware payload and exfiltrating sensitive data prior to encryption. The group has demonstrated a particular focus on healthcare and educational institutions, with notable attacks documented by CISA and FBI advisories highlighting their targeting of hospitals and school districts across multiple countries, resulting in significant operational disruptions to critical services. As of late 2024, Rhysida remains an active threat with continued operations targeting organizations primarily in the United States, Canada, and other Western nations, maintaining their focus on high-value sectors where operational disruption can maximize ransom payment likelihood. The group has been linked to 287 public disclosures across our corpus. First observed on a leak site on June 5, 2023; most recent post August 15, 2026. The operation is currently active.

Timeline of this disclosure

  • August 13, 2026SIA Medical Centre listed by Rhysidaon the group's public leak site

Other recent disclosures by Rhysida

Rhysida has been linked to 287 public victims on Darkfield. A sample of the most recent:

See the full Rhysida 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, SIA Medical Centre is reported in Latvia, a country with 4 ransomware disclosures in our corpus.

If your organisation is affected

A listing by Rhysida means SIA Medical Centre 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 Rhysida'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.