high severity August 13, 2026 · 4 min read Unverified claim — what this is

SIA Medical Centre Listed by Rhysida Ransomware Group

If you were named in this filing, here’s what is being claimed, and what it would mean for you.

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, t
— from Rhysida’s own leak-site posting. This is the group’s claim, quoted verbatim; it is not GalaxyWarden’s reporting and has not been independently verified.

SIA Medical Centre Listed by Rhysida Ransomware Group

If you had an account or received care at SIA Medical Centre, the rhysida ransomware group has listed the practice on its leak site. The group claims to have obtained patient records, clinical notes, Medicare numbers and other internal files. As of this writing, SIA Medical Centre has not publicly confirmed the claim, data theft or ransomware incident.

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That single fact shapes everything that follows. Until independent confirmation appears, this remains an unverified claim made by an extortion crew whose business model depends on creating pressure. For you, the immediate question is what this listing could mean for your information and what steps remain under your control regardless of whether the claim is accurate, exaggerated or false.

What the Listing Claims Were Taken

According to the rhysida posting, the material includes clinical notes, patient dossiers, Medicare details and administrative records. The group has not disclosed whether any password field was present, and if one was, it has not revealed the storage method used by the practice.

Because the storage scheme is unknown, treat any password you used for the SIA Medical Centre patient portal or staff system as potentially compromised. Change it immediately on that site and anywhere else you reused the same password. This precautionary step is the safest response when the technical details are undisclosed.

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Report details & sourcing

Attributed to Rhysida · 320 incidents tracked →

Severity High the filing does not enumerate what was exposed

Disclosed August 13, 2026

Last reviewed August 13, 2026

Affected Unconfirmed

By GalaxyWarden Threat Research · Editorial & sourcing standards

Unverified claim — what this report is

This page documents a public listing on a ransomware/extortion group’s leak site, tracked via public threat-intelligence sources. A listing is the attacker’s claim. GalaxyWarden aggregates and reports such claims; we have not independently verified that a breach occurred, what data (if any) was taken, or the accuracy of anything the group asserts, and the named organisation has not necessarily confirmed the incident. Sections above describe what the listing shows and the group’s documented history — not verified findings about the named organisation. If you represent this organisation and believe anything here is inaccurate, tell us and we’ll review it promptly.

Editorial & sourcing policy

GalaxyWarden is a breach-monitoring service and news aggregator. We do not exfiltrate, host, purchase, or redistribute stolen data. Breach information is compiled from publicly accessible sources and threat-intelligence platforms, and is reported as claims attributed to their source. We promptly correct or remove material shown to be inaccurate — see our content & takedown policy or write to support@galaxywarden.com.

Threat-actor tracker

Rhysida — 320 incidents tracked

Every breach we've attributed to Rhysida, in one running log. See who else they've hit →

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