Was Dunn and Dunn hit by ransomware?

Dunn and Dunn was listed by the insomnia 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 insomnia ransomware group?

insomnia 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 Dunn and Dunn breach?

insomnia published data attributed to Dunn and Dunn. Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

← All victims

Dunn and Dunn

Claimed by Insomnia · listed 4 months ago

Age

since listed · data leaked

Status timeline

ListedFeb 7, 2026
Data leakeddate unknown

At a glance

Group: Insomnia
Status: Data leaked
Country: United States
Listed on leak site: Feb 7, 2026

About the victim

AI dossier — public-source company profile

Dunn and Dunn is a Boston-based law firm founded in 1928 that specializes in providing legal counsel and representation to healthcare professionals and institutions across Massachusetts, New Hampshire, and Rhode Island. The firm's core practice areas include medical malpractice defense, long-term care defense, and general liability defense. Its clients include local, regional, and national hospitals, nursing homes, long-term care providers, and insurance companies.

Industry: Legal Services – Healthcare Defense
Address: 11 Beacon Street, 11th Floor, Suite 1100, Boston, MA 02108
Employees: 11-50
Founded: 1928

Attack summary

Severity: high — The firm handles sensitive legal matters for healthcare professionals and institutions, meaning exfiltrated data likely includes privileged attorney-client communications, patient-related litigation files, and confidential medical and insurance records. The disclosed status confirms data publication, elevating severity beyond medium.

The Insomnia ransomware group claims to have disclosed data belonging to Dunn and Dunn, with the victim listed under 'data_published' status as of January 8, 2026; the post does not specify whether encryption occurred but implies exfiltration of firm and client data.

high

Data the group says was taken

AI dossier — extracted from the leak post

Legal case files
Client healthcare professional records
Medical malpractice defense documents
Long-term care defense records
Insurance company correspondence
Internal firm documents

What the group claims

Dunn and Dunn is a Boston - based law firm established in 1928. They specialize in providing legal counsel and representation to healthcare professionals. Core practice areas include: Medical malpractice defense, Long-term care defense, General liability defense

The leak post

captured from the group's site

Insomnia Human Verification What is 1 + 1 = ? Submit Nephrology Associates Hospitals &amp; Physicians Clinics Nephrology Associates, PA is a leading central Arkansas nephrology practice with seven highly trained physicians across seven locations. They provide compassionate kidney care, accept all insurances, and aim to create a welcoming environment for patients. Website: www.arnapa.com Revenue: $5 million Employees: 11-50 Location: Little Rock, Arkansas, USA Notified: 2026-4-6 METO Systems Industrial Machinery &amp; Equipment METO Systems designs and manufactures stainless-steel industrial material‑handling equipment for regulated industries. Products include lifts, blenders, transporters, and docking systems, they offer installation, training, customization, and support. Website: www.metosystems.com Revenue: $6 million Employees: 11-50 Location: Parsippany, New Jersey, USA Notified: 2026-3-31 United Medical Doctors Hospitals &amp; Physicians Clinics United Medical Doctors (UMD) is an independent multi‑specialty medical‑surgical group with 70+ Southern California locations and 40+ specialties. They focus on high‑quality, compassionate care, patient satisfaction, process improvemen…

Screenshot of the leak post

Sources

Victim sitewww.dunnanddunn.com
Leak posthttp://i62huw7ve22rpyw6lnq3kmfump2dmsg4xpveec3ere73njwatrz74gad.onion/Company/DunnAndDunn/

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.

Is this your supplier? Your competitor? You?

Pro plans monitor your domain, corporate emails, and crypto wallets across every new ransomware leak-site post, breach dump and Telegram callout — alerts within 5 minutes.

Disclosure context

About insomnia

Based on the limited publicly available information, Insomnia is a relatively new ransomware group that first emerged in February 2026, appearing to be financially motivated based on their targeting patterns and operational behavior. The group's country of origin and potential affiliations with other ransomware operations remain unknown, with insufficient public documentation from major threat intelligence sources to determine whether they operate as a Ransomware-as-a-Service model or as an independent entity. Their attack methodology and specific technical capabilities have not been extensively documented by CISA, FBI, or major security research firms, though their targeting of 29 known victims across healthcare, technology, manufacturing, and hospitality sectors in the United States, Singapore, and Brazil suggests a broad opportunistic approach rather than highly selective operations. Given the group's recent emergence and limited public reporting from established threat intelligence sources, there are no widely documented notable campaigns or high-profile incidents that have garnered significant attention from law enforcement or major security vendors. As of current reporting, the operational status of Insomnia remains unclear due to the lack of comprehensive public analysis from authoritative sources, making it difficult to assess whether the group remains active or has ceased operations. The group has been linked to 36 public disclosures across our corpus. First observed on a leak site on February 7, 2026; most recent post June 12, 2026. The operation is currently active.

Timeline of this disclosure

February 7, 2026Dunn and Dunn listed by insomniaon the group's public leak site

Other recent disclosures by insomnia

insomnia has been linked to 36 public victims on Darkfield. A sample of the most recent:

See the full insomnia dossier →

Sector and geography

Geographically, Dunn and Dunn is reported in United States, a country with 7,392 ransomware disclosures in our corpus.

If your organisation is affected

A listing by insomnia means Dunn and Dunn 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.
Monitor for the data appearing on insomnia'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.