Was Mile Bluff Medical Center hit by ransomware?

Mile Bluff Medical Center was listed by the Dark Project ransomware operation (United States), 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 Dark Project ransomware group?

Dark Project 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 Mile Bluff Medical Center breach?

Dark Project published data attributed to Mile Bluff Medical Center. Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

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Mile Bluff Medical Center

Claimed by Dark Project · listed 3 days ago

Age

since listed · data leaked

Status timeline

ListedAug 5, 2026
Data leakeddate unknown

At a glance

Group: Dark Project
Status: Data leaked
Country: United States
Sector: Healthcare
Listed on leak site: Aug 5, 2026

About the victim

AI dossier — public-source company profile

Mile Bluff Medical Center is a healthcare provider located in Mauston, Wisconsin, founded in 1912. It offers acute emergency care, long-term nursing, rehabilitation, primary care, pediatrics, surgery, orthopedics, and senior services across multiple clinic and hospital locations serving regional communities.

Industry: Healthcare - Hospital & Medical Center
Address: 1050 Division Street, Mauston, WI 53948
Founded: 1912

Attack summary

Severity: critical — Confirmed exfiltration of regulated healthcare data at scale (25,000+ individuals) including Protected Health Information (PHI), medical records, SSNs, and financial information; falls squarely under HIPAA-regulated sensitive data and represents significant regulatory and reputational risk.

Dark Project claims to have exfiltrated over 550 GB of sensitive data from Mile Bluff Medical Center, including full SQL database backups, employee records, financial information, bank records, and patient medical documentation. The group alleges personal data of over 25,000 patients and staff members was compromised.

critical

Data the group says was taken

AI dossier — extracted from the leak post

SQL database backup
employee records
financial records
bank records
patient personal documents
Social Security numbers
medical records
medical histories
surgical records

What the group claims

About Mile Bluff Medical Center Located in Mauston, Wisconsin, Mile Bluff Medical center has been in operation since 1912. Its services include acute emergency care, as well as long term nursing and rehabilitation A "Mile Bluff Medical Center" company suffered a cyberattack leading to the theft of over 550 GB of sensitive data. Exposed files include a full SQL database backup, employee records, confidential company financial information, bank records, patients' personal documents, Social Security numbers, medical records, medical histories, and surgical records. As a result, the personal data of more than 25,000 patients and staff members was leaked. Download here: http://7iphetz64a7iihcpwr3nirjioghyt6lrku62gu4z7f3zo7rcz5qrgvad.onion/

Sources

Source

Indexed 3 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 Dark Project

Dark Project is a ransomware group first observed in August 2026 with an apparent primary motivation of financial gain, based on its targeting profile and operational patterns consistent with other profit-driven ransomware actors. As of the time of this writing, no major cybersecurity organizations including CISA, the FBI, Mandiant, or other reputable threat intelligence firms have published detailed public reporting attributing Dark Project to a specific nation-state, threat actor cluster, or affiliated ransomware ecosystem, and it remains unclear whether the group operates as a Ransomware-as-a-Service platform or as an independent closed operation. Based on available victim telemetry, the group has claimed at least 18 known victims across a geographically diverse range of countries, with the United States, United Kingdom, Mexico, the Philippines, and Germany representing its most frequently targeted regions. Its sectoral focus spans manufacturing, healthcare, transportation, hospitality, and education, suggesting an opportunistic targeting methodology rather than a narrowly defined strategic focus, though the inclusion of healthcare and critical infrastructure-adjacent sectors such as transportation warrants continued monitoring. Due to the group's recent emergence and limited public documentation at this time, specific details regarding initial access vectors, encryption implementation, extortion tactics, and tooling remain unconfirmed by open-source intelligence sources, and analysts should treat any further claims with appropriate caution pending corroborating reporting from authoritative sources. Dark Project should be considered an emerging threat actor under active observation. The group has been linked to 19 public disclosures across our corpus. First observed on a leak site on August 5, 2026. The operation is currently active.

Timeline of this disclosure

August 5, 2026Mile Bluff Medical Center listed by Dark Projecton the group's public leak site

Other recent disclosures by Dark Project

Dark Project has been linked to 19 public victims on Darkfield. A sample of the most recent:

See the full Dark Project 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, Mile Bluff Medical Center is reported in United States, a country with 3,159 ransomware disclosures in our corpus.

If your organisation is affected

A listing by Dark Project means Mile Bluff Medical Center 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 Dark Project'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.