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SIA Medical

Claimed by Rhysida · listed 4 days ago

3 TB
Data size
20000 records
3d
Age
since listed · listed for ransom

Status timeline

  1. ListedAug 14, 2026

Current state: Listed for ransom

At a glance

Group
Rhysida
Status
Listed for ransom
Country
Australia
Sector
Healthcare
Listed on leak site
Aug 14, 2026
Data size
3 TB
Records
20000

About the victim

AI dossier — public-source company profile

SIA Medical is a private multi-clinic healthcare provider founded by Dr Martin Sia in 1993, operating 9 clinics across Melbourne's northwest and suburbs. The practice delivers general and specialist medical services to the local community.

Industry
Private Medical Practice & Clinic Network
Address
Multiple locations: Box Hill, Burwood, Croydon, Essendon, Footscray, Moonee Ponds, Montrose, Mulgrave and Berwick, Melbourne, Victoria, Australia
Employees
51-200
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, tax file numbers, and plaintext credentials for clinical systems. This constitutes multiple categories of Australian protected information under privacy law and creates direct harm risk to identified individuals.

Rhysida claims to have exfiltrated approximately 20,000 patient medical records, staff identity documents, plaintext credentials for clinical systems, HR records, and legal/financial documents. The group is offering the data for sale with a stated 7-day auction window.

critical

Data the group says was taken

AI dossier — extracted from the leak post
  • Patient medical records (~20,000)
  • Patient names, dates of birth, Medicare numbers
  • Clinical notes and full patient dossiers
  • Insurance and work-cover files
  • Staff passports and 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
  • Legal documents and subpoenas
  • Financial records (Bupa contracts, bank details, provider payment forms)

What the group claims

SIA Medical was established in 1993 and was founded by Dr Martin Sia in Melbourne's northwest. Operates 9 clinics across Box Hill, Burwood, Croydon, Essendon, Footscray, Moonee Ponds, Montrose, Mulgrave and Berwick.

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!

Data the group says was taken

  • patient medical records
  • names
  • dates of birth
  • Medicare numbers
  • clinical notes
  • insurance files
  • work-cover files
  • patient dossiers
  • staff identity documents
  • passports
  • driver's licenses
  • police checks
  • tax file declarations
  • plaintext credentials
  • logins and passwords
  • HR records
  • employment contracts
  • staff incident reports
  • immunisation registers
  • legal documents
  • subpoenas
  • complaints
  • contracts
  • bank details
  • provider payment forms

Screenshot of the leak post

Leak screenshot for SIA Medical

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 14, 2026SIA Medical listed by Rhysidaon the group's public leak site
Data size
3 TB
Records
20000

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 is reported in Australia, a country with 455 ransomware disclosures in our corpus.

If your organisation is affected

A listing by Rhysida means SIA Medical appeared on a ransomware extortion site and is being pressured to pay before any publication. 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, ACSC (Australia), as required for your jurisdiction.
  • 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.