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NYC Health + Hospitals

Claimed by LEAKNET · listed 2 days ago

11TB
Data size
12000000 records
1d
Age
since listed · data leaked

Status timeline

  1. ListedAug 22, 2026
  2. Data leakeddate unknown

At a glance

Group
LEAKNET
Status
Data leaked
Country
United States
Sector
Healthcare
Listed on leak site
Aug 22, 2026
Data size
11TB
Records
12000000

About the victim

AI dossier — public-source company profile

NYC Health + Hospitals is the largest municipal healthcare system in the United States, operating acute care hospitals, nursing homes, and outpatient clinics across New York City. Founded in 1736, it serves millions of patients annually and is a critical component of NYC's public health infrastructure.

Industry
Public Healthcare System
Address
New York City, NY, USA
Employees
70000
Founded
1736

Attack summary

Severity: critical — Confirmed exfiltration and public release of 11TB of protected health information (PHI) affecting 12+ million patients, including sensitive diagnoses (HIV) and full medical records. This represents massive-scale HIPAA-regulated data exposure with direct patient privacy harm.

LEAKNET claims to have exfiltrated 11TB of data from NYC Health + Hospitals, including protected health information for over 12 million patients. The group has published the full dataset and highlights include medical records, patient demographics, and sensitive health data including HIV status information.

critical

Data the group says was taken

AI dossier — extracted from the leak post
  • Medical records
  • Patient demographics
  • HIV status information
  • Clinical notes
  • Patient identities
  • Health history

What the group claims

Over 12 million patients affected. Hospital and Mayor's Office allegedly made false statements to the Senate. 11TB archive made public.

The leak post

captured from the group's site
##### The 11TB NYC Health + Hospitals Archive is Now Public
#NYCHealthHospitals #HealthcareBreach #DataLeak #HIPAA #SenateHELP #Cassidy #Mamdani #CyberSecurity #DataBreach #PatientPrivacy #HIV #MedicalRecords #12MillionNot1Point8 #HealthcareSecurity #2026Breach #NYC #PublicHealth #SenateInvestigation
##### Data Exfiltration Diaries: The Shocking Stories Inside NYC Health + Hospitals
#NYCHealthHospitals #HealthcareBreach #DataLeak #HIPAA #SenateHELP #Cassidy #Mamdani #CyberSecurity #DataBreach #PatientPrivacy #HIV #MedicalRecords #12MillionNot1Point8 #HealthcareSecurity #2026Breach #NYC #PublicHealth #SenateInvestigation #FalseStatemen
##### NYC Health + Hospitals: Over 12 Million Patients. Lie to the Senate. Hospital and Mayor's Office Sacrifice Their Own Patients
#NYCHealthHospitals #HealthcareBreach #DataLeak #HIPAA #SenateHELP #Cassidy #Mamdani #CyberSecurity #DataBreach #PatientPrivacy #HIV #MedicalRecords #12MillionNot1Point8 #HealthcareSecurity #2026Breach #NYC #PublicHealth #SenateInvestigation #FalseStatemen
##### FULL DATA of MagMutual Company: 1.1 TB Of Sensitive Information From Cybersecurity Experts
#Leaknet #Magmutual #SecurityCulture #DigitalPrivacy #PasswordSecurity …

Data the group says was taken

  • medical records
  • patient data
  • HIV records

Screenshot of the leak post

Leak screenshot for NYC Health + Hospitals

Sources

Source

Indexed 2 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 LEAKNET

<br/> <br/>In the cyber-undergrounds, we're exploring shadowed corridors of the digital world in search of inside information. we’re a digital watchdog operating at the intersection of cybersecurity, internet freedom, and investigative journalism. We delve into the hidden corners of the web, exposing truths and uncovering stories that are often buried by mainstream media or distorted by corporate interests. <br/> <br/>This project isn’t just for tech experts or privacy advocates. It’s for everyone who values transparency, freedom, and integrity in a connected world. Operating independently, we’re free from corporate influence and political bias, enabling us to report with uncompromising honesty. Our work resonates with a diverse audience cybersecurity experts, digital rights activists, journalists, and anyone who values an internet free from control. <br/> <br/>In a world where the lines between truth and agenda grow increasingly blurred, we’re building something bold, the space where the truth of the internet can be uncovered, untamed and unfiltered. Our project is an independent voice for digital freedom, committed to shining a light on the internet’s most vital and vulnerable spaces: cybersecurity, privacy, and the right to information without compromise. <br/> <br/>In a landscape clouded by agendas and profit, we are here to do one thing: deliver the truth, boldly and beautifully. Join us as we push back against the systems that seek to compromise our digital freedoms and carve a path toward a more transparent, liberated internet. <br/> The group has been linked to 7 public disclosures across our corpus. First observed on a leak site on June 15, 2026; most recent post August 22, 2026. The operation is currently active.

Timeline of this disclosure

  • August 22, 2026NYC Health + Hospitals listed by LEAKNETon the group's public leak site
Data size
11TB
Records
12000000

Other recent disclosures by LEAKNET

LEAKNET has been linked to 7 public victims on Darkfield. A sample of the most recent:

See the full LEAKNET 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, NYC Health + Hospitals is reported in United States, a country with 3,164 ransomware disclosures in our corpus.

If your organisation is affected

A listing by LEAKNET means NYC Health + Hospitals 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, CISA (United States), as required for your jurisdiction.
  • Monitor for the data appearing on LEAKNET'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.