high severity November 09, 2025 · 3 min read Unverified claim — what this is

heywood.org Listed by Sinobi Ransomware Group

If you are a customer of heywood.org, here’s what is being claimed, and what it would mean for you.

A member of the Heywood Healthcare system, Heywood Hospital is an acute care hospital in Gardner, MA, providing a broad range of high quality medical, surgical, obstetrical, pediatric and behavioral health services on an inpatient and outpatient basis.
— from Sinobi’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.

heywood.org Listed by Sinobi Ransomware Group

On November 9, 2025, Heywood Hospital in Gardner, Massachusetts, appeared on the leak site of the sinobi ransomware group. The hospital, part of the Heywood Healthcare system, may have had internal files stolen during a ransomware attack. Public reporting indicates the number of people whose information was exposed remains unknown.

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What Public Reporting Shows

Heywood Hospital provides inpatient and outpatient medical, surgical, obstetrical, pediatric, and behavioral health services. The sinobi group posted evidence of the breach on its dark-web leak site, listing the organization under entry 6910edb388b6823fa25da952. Available reporting describes the stolen material as internal files exfiltrated before encryption. No confirmed total of affected records or specific patient counts has been released by the hospital or the attackers.

November 9, 2025 marks the public listing date. The breach falls into the high-severity category typical of ransomware incidents that combine data theft with encryption demands.

Why This Matters for You and Your Family

When a local hospital suffers a breach, the people most likely to be affected are those who live nearby and have received care there. If you or any member of your family has been a patient at Heywood Hospital, your medical records, billing details, or personal identifiers may now sit in an attacker’s archive. Medical data is especially sensitive because it can reveal diagnoses, treatments, insurance information, and Social Security numbers.

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What the free scan actually returns

Sample resultyou@email.comIllustrative — not a real person

Found on people-search siteswe remove these

These listings are live, public, and legal to remove — and removing them is what we do.

value redacted in this sampleage, relatives, address historySpokeo

value redacted in this samplephone, household, property recordsBeenVerified

value redacted in this sample580 companies checked

Found in breach recordsverifiedreported — unverified

Each record is labeled: confirmed breach data, or an attacker’s claim no one has verified.

verifiedvalue redacted in this samplepassword + phone · 2024telecom breach

unverifiedvalue redacted in this sampleclaimed in ransomware listing · 2026leak-site claim

Leaked data cannot be deleted from the internet — anyone claiming otherwise is lying. Broker listings can be removed. We do the second, and show you exactly what to fix from the first.

Report details & sourcing

Attributed to Sinobi · 274 incidents tracked →

Severity High the filing does not enumerate what was exposed

Disclosed November 09, 2025

Last reviewed August 8, 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.

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Sinobi — 274 incidents tracked

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