Was Wunschkind Klinik Dr Brunbauer hit by ransomware?

Wunschkind Klinik Dr Brunbauer was listed by the thegentlemen ransomware operation (Austria), 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 thegentlemen ransomware group?

thegentlemen 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 Wunschkind Klinik Dr Brunbauer breach?

thegentlemen published data attributed to Wunschkind Klinik Dr Brunbauer. Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

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Wunschkind Klinik Dr. Brunbauer

listed as Wunschkind Klinik Dr Brunbauer · Claimed by Thegentlemen · listed 6 days ago

Age

since listed · data leaked

Status timeline

ListedJul 23, 2026
Data leakeddate unknown

At a glance

Group: Thegentlemen
Status: Data leaked
Country: Austria
Sector: Healthcare
Listed on leak site: Jul 23, 2026

About the victim

AI dossier — public-source company profile

Wunschkind Klinik Dr. Brunbauer is a fertility clinic located in central Vienna, Austria, specializing in assisted reproductive treatments including IVF, insemination, diagnostics, hormone therapy, egg donation, and cryopreservation. Led by Dr. Mathias Brunbauer, it is a recognized partner clinic of Austria's IVF-Fonds program and serves patients seeking infertility treatment.

Industry: Fertility & Reproductive Medicine
Address: Ebendorferstraße 6/4, 1010 Wien, Austria

Attack summary

Severity: critical — Confirmed exfiltration of large-scale protected health information (PHI) and personal data from a regulated healthcare facility. Medical records, treatment histories, and patient personal data are highly sensitive regulated information under GDPR and Austrian healthcare privacy laws. Hundreds of gigabytes of data represents exposure of potentially thousands of patient records.

The threat actor claims to have exfiltrated hundreds of gigabytes of files including databases, client contracts, personal data, medical histories, treatment records, and medical reports. The group threatens publication if ransom is not paid.

critical

Data the group says was taken

AI dossier — extracted from the leak post

medical histories
treatment records
medical reports
client contracts
personal data
database projects
patient records

What the group claims

***.at zoominfo.com/c/wunschkind-klinik-dr-brunbauer/1320140781 We have hundreds of gigabytes of your files, including database projects, client contracts, personal data and documents, medical data, medical histories, treatment records, medical reports, and more—all of which constitute critically important information. If you do not want to face the consequences of a data breach, please contact us; otherwise, everything will be published. fertility clinic in Vienna, Austria, led by Dr. Brunbauer. Located in the city center, the clinic specializes in fertility treatments including IVF, insemination, diagnostics, hormone therapy, egg donation, and cryopreservation. It is a recognized partner clinic of Austria's IVF-Fonds program.

Sources

Victim sitewunschkind.at

Source

Indexed 6 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 thegentlemen

thegentlemen is a ransomware group that emerged in September 2025, operating with apparent financial motivations based on their broad targeting of commercial sectors. The group has documented 267 victims across multiple countries, with primary focus on the United States, Thailand, France, Brazil, and India. Their targeting strategy demonstrates a preference for high-value sectors including manufacturing, technology, healthcare, and financial services organizations. Given the group's recent emergence and limited public documentation from established threat intelligence sources such as CISA, FBI, or major security research firms, specific details regarding their country of origin, operational structure, attack methodologies, encryption techniques, and whether they employ ransomware-as-a-service models remain unclear. The relatively high victim count of 267 in a short operational timeframe since September 2025 suggests either an aggressive campaign pace or potential inflation of victim numbers through affiliate operations, though without corroborating intelligence reports, the group's exact operational capabilities and notable campaigns cannot be definitively established. Current intelligence indicates the group remains active as of late 2025, though comprehensive threat profiling requires additional validated reporting from authoritative cybersecurity sources. The group has been linked to 655 public disclosures across our corpus. First observed on a leak site on September 9, 2025; most recent post July 28, 2026. The operation is currently active.

Also tracked as: the gentlemen.

Timeline of this disclosure

July 23, 2026Wunschkind Klinik Dr Brunbauer listed by thegentlemenon the group's public leak site

Other recent disclosures by thegentlemen

thegentlemen has been linked to 655 public victims on Darkfield. A sample of the most recent:

See the full thegentlemen dossier →

Sector and geography

This disclosure adds to ransomware activity in the Healthcare sector, which has 2,603 disclosures indexed across all operators we track. Geographically, Wunschkind Klinik Dr Brunbauer is reported in Austria, a country with 15 ransomware disclosures in our corpus.

If your organisation is affected

A listing by thegentlemen means Wunschkind Klinik Dr Brunbauer 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.at (Austria), as required for your jurisdiction.
Monitor for the data appearing on thegentlemen'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.