Disclosure context

About kazu

The Kazu ransomware group is a relatively new threat actor that emerged in November 2025, operating with apparent financial motivations based on their targeting patterns across multiple sectors and geographic regions. Given their recent emergence and limited public documentation, details about their country of origin and potential affiliations remain unclear, though their targeting of diverse international victims suggests either a ransomware-as-a-service model or an independent operation with broad reach capabilities. With only nine documented victims to date, specific details about Kazu's attack methodology, initial access vectors, and encryption techniques have not been extensively documented by major threat intelligence organizations, though their targeting spans healthcare, public sector, financial services, and technology organizations across the United States, Colombia, South Africa, Nigeria, and Great Britain. The group's recent emergence means there are no widely reported major campaigns or high-profile incidents documented by established security research organizations like Mandiant, CISA, or the FBI. As of the latest available intelligence, Kazu appears to remain active given their very recent first observation date, though their limited victim count and recent emergence make definitive assessments of their operational status preliminary. The group has been linked to 12 public disclosures across our corpus. First observed on a leak site on November 11, 2025; most recent post May 20, 2026. The operation is currently active.

Timeline of this disclosure

December 30, 2025ManageMyHealth - New Zealand listed by kazuon the group's public leak site

Sector and geography

This disclosure adds to ransomware activity in the Healthcare sector, which has 1,779 disclosures indexed across all operators we track. Geographically, ManageMyHealth - New Zealand is reported in New Zealand, a country with 2 ransomware disclosures in our corpus.

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.

Ransomware victim disclosure

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ManageMyHealth - New Zealand

Claimed by kazu · listed 5 months ago

Age

since listed · data leaked

Status timeline

Listed
Dec 30, 2025
Data leaked

At a glance

Group: kazu
Status: Data leaked
Country: New Zealand
Sector: Healthcare
Listed on leak site: Dec 30, 2025

About the victim

AI dossier — public-source company profile

Manage My Health is a New Zealand-based secure online health portal used by over 1.5 million New Zealanders and most health centres across the country. The platform enables patients to access medical records, book appointments, order repeat prescriptions, view test results, and conduct video consultations with healthcare providers. It also supports family health record management and integrates with medical practices to streamline patient-provider communication.

Industry: Digital Health Patient Portal
Address: New Zealand

Attack summary

Severity: critical — The platform holds regulated medical and personal health data for over 1.5 million New Zealand patients. Data has been confirmed as published, constituting large-scale exfiltration of sensitive healthcare PII including medical records, prescriptions, and test results — meeting the threshold for critical severity.

The group 'kazu' claims to have compromised Manage My Health, with the company's own website confirming a cyber security incident identified on 30 December 2025. The disclosed status indicates data has been published, suggesting exfiltration of patient health and personal data from the platform.

critical

Data the group says was taken

AI dossier — extracted from the leak post

Medical records
Test results
Prescription information
Appointment data
Patient health history
Personal identifying information
Family health records
Healthcare provider communications

What the group claims

ManageMyHealth is a New Zealand-based online platform that enables individuals to conveniently manage their health and well-being by providing secure access to their medical records and communication with healthcare providers. The platform allows users to view test results, manage prescriptions, schedule appointments, and track their health history from any device. It aims to improve healthcare accessibility, streamline communication between patients and medical professionals, and enhance overall health management, all while ensuring data privacy and security. Through this service, patients can stay informed about their health, make more proactive decisions, and access necessary care with greater ease.

Sources

Victim sitemanagemyhealth.co.nz

Source

Indexed 5 months 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.