Was Brazil Mobilemed: Cloud PACS Platform hit by ransomware?

Brazil Mobilemed: Cloud PACS Platform was listed by the kazu ransomware operation (Brazil), and stolen data was published on the group's leak site. Darkfield tracks this disclosure with the original leak post, screenshot and group context.

Who is the kazu ransomware group?

kazu is a ransomware operator tracked by Darkfield. See the full operator dossier for its known victims, sectors targeted, IOCs and leak-site infrastructure.

What data was leaked in the Brazil Mobilemed: Cloud PACS Platform breach?

kazu published data attributed to Brazil Mobilemed: Cloud PACS Platform. Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

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Mobilemed

listed as Brazil Mobilemed: Cloud PACS Platform · Claimed by Kazu · listed 16 hours ago

Today

Age

since listed · data leaked

Status timeline

ListedAug 23, 2026
Data leakeddate unknown

At a glance

Group: Kazu
Status: Data leaked
Country: Brazil
Sector: Healthcare
Listed on leak site: Aug 23, 2026

About the victim

AI dossier — public-source company profile

Mobilemed is a Brazil-based health technology company that provides a cloud-based PACS (Picture Archiving and Communication System) platform for radiologists, hospitals, and diagnostic imaging centers. The platform enables secure storage, access, management, and sharing of medical images and diagnostic reports, supporting teleradiology workflows. According to their public site, they serve over 5,200 radiologists, 78,000 users, and process more than 2.2 million reports monthly across 4,000+ healthcare units in Brazil.

Industry: Healthcare Technology & Medical Imaging Software

Attack summary

Severity: critical — Confirmed exfiltration of healthcare data from a PACS platform serving thousands of radiologists and tens of thousands of users. Medical records and diagnostic imaging represent regulated sensitive personal health information (PHI) at scale, triggering critical severity regardless of proof-file count or ransom disclosure.

The kazu group claims to have compromised Mobilemed's cloud PACS platform and exfiltrated healthcare data. The leak post does not specify the scope of patient records, medical images, or diagnostic reports accessed, nor does it detail any ransom demand.

critical

Data the group says was taken

AI dossier — extracted from the leak post

Medical images and diagnostic reports
Patient healthcare data
Radiologist records
Exam data and patient information

What the group claims

Mobilemed is a Brazil-based health technology company that provides a cloud-based PACS (Picture Archiving and Communication System) for radiologists, hospitals, and diagnostic imaging centers. Its platform enables healthcare professionals to securely store, access, manage, and share medical images and diagnostic reports from anywhere, supporting teleradiology and improving workflow efficiency.

Sources

Victim sitemobilemed.com.br

Source

Indexed 16 hours 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 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 23 public disclosures across our corpus. First observed on a leak site on November 11, 2025; most recent post August 23, 2026. The operation is currently active.

Timeline of this disclosure

August 23, 2026Brazil Mobilemed: Cloud PACS Platform listed by kazuon the group's public leak site

Other recent disclosures by kazu

kazu has been linked to 23 public victims on Darkfield. A sample of the most recent:

See the full kazu 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, Brazil Mobilemed: Cloud PACS Platform is reported in Brazil, a country with 207 ransomware disclosures in our corpus.

If your organisation is affected

A listing by kazu means Brazil Mobilemed: Cloud PACS Platform 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, CERT.br (Brazil), as required for your jurisdiction.
Monitor for the data appearing on kazu'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.