Disclosure context

About beast

The Beast ransomware group is a relatively new threat actor that emerged in July 2025, operating with apparent financial motivations through their ransomware campaigns. With limited public documentation available from major security agencies, the group has demonstrated activity primarily targeting victims across the United States, United Kingdom, Brazil, South Korea, and Argentina, accumulating approximately 65 known victims since their emergence. Their targeting pattern shows a focus on healthcare organizations, manufacturing companies, educational institutions, and construction firms, suggesting an opportunistic approach rather than highly specialized sector expertise. The group's recent emergence means there is insufficient public intelligence from CISA, FBI, Mandiant, or other established security researchers regarding their specific attack methodologies, initial access vectors, or technical capabilities. Given the timeline of their first observation in mid-2025, Beast represents an active and emerging threat with their current operational status remaining unclear due to limited threat intelligence reporting from authoritative sources. The group has been linked to 75 public disclosures across our corpus. First observed on a leak site on July 29, 2025; most recent post May 21, 2026. The operation is currently active.

Timeline of this disclosure

January 21, 2026Orthopaedic Specialists of Massachusetts listed by beaston the group's public leak site

Ransom demanded: $23.83

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, Orthopaedic Specialists of Massachusetts is reported in United States, a country with 7,392 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

← All victims

Orthopaedic Specialists of Massachusetts

Claimed by beast · listed 4 months ago

$23.83

Ransom

demanded

Age

since listed · data leaked

Status timeline

Listed
Jan 21, 2026
Data leaked

At a glance

Group: beast
Status: Data leaked
Country: United States
Sector: Healthcare
Listed on leak site: Jan 21, 2026
Ransom demanded: $23.83

About the victim

AI dossier — public-source company profile

Orthopaedic Specialists of Massachusetts (OSM) is a multi-physician orthopaedic and sports medicine practice with offices in Norwood and Milton, Massachusetts. The practice provides surgical and non-surgical treatment of orthopaedic conditions, including arthroscopic surgery, joint replacement, fracture care, and sports medicine. OSM serves patients of all ages and operates weekdays with expedited appointment availability.

Industry: Orthopaedic & Sports Medicine Healthcare
Address: Norwood, MA and Milton, MA (primary locations); also Sandwich, MA referenced in leak post

Attack summary

Severity: critical — The victim is a healthcare provider handling protected health information (PHI) subject to HIPAA; the disclosure status is 'data_published', confirming exfiltration and public release of likely regulated medical and patient PII at scale.

The Beast ransomware group claims to have compromised Orthopaedic Specialists of Massachusetts and has published data (disclosed status: data_published), indicating exfiltration of patient and/or business records from a healthcare provider handling protected health information.

critical

Data the group says was taken

AI dossier — extracted from the leak post

Patient records
Medical/clinical data
Personal health information (PHI)
Business/administrative records
Patient forms and intake data

What the group claims

Orthopaedic Specialists of Massachusetts provides superior orthopaedic and sports medicine care through a team of expert surgeons and physicians. Their services include surgical and non-surgical treatments for a variety of orthopaedic issues, such as arthroscopic surgery, joint replacements, and sports medicine. With locations in Norwood, Milton, and Sandwich, MA, they cater to patients of all ages and offer expedited appointments. The practice is dedicated to delivering compassionate care and improving patients' health and quality of life.

The leak post

captured from the group's site

[ 2fORM Architecture specializes in innovative sustainable architecture, offering design services for residential, commercial, and interior projects. Their portfolio includes a diverse range of developments, such as multi-family housing, health care facilities, and various remodels. The company aims to serve clients in the Pacific Northwest, including individual homeowners, businesses, and institutions. With a commitment to sustainability and creativity, 2fORM Architecture enhances the built environment through thoughtful design. ](http://beast6azu4f7fxjakiayhnssybibsgjnmy77a6duufqw5afjzfjhzuqd.onion/card/2form_architecture)[ ACMARK s r o is a company that operates in the Repair Services industry. It employs 10to19 people and has 1Mto5M of revenue. The company is headquartered in Brno, South Moravian, Czech Republic. ](http://beast6azu4f7fxjakiayhnssybibsgjnmy77a6duufqw5afjzfjhzuqd.onion/card/acmark)[ AJU Pharm Co., Ltd. is a prominent South Korean total healthcare company founded in 1953. For over 70 years, it has evolved from a manufacturer of raw materials into a global pharmaceutical group specializing in prescription drugs, medical devices, and health supplements P U B L I S H…

Screenshot of the leak post

Leak screenshot for Orthopaedic Specialists of Massachusetts

Sources

Source

Indexed 4 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.