Was NorthShore Health Centers hit by ransomware?

NorthShore Health Centers 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 NorthShore Health Centers breach?

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

Ransomware victim disclosure

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NorthShore Health Centers

Claimed by Insomnia · listed 6 days ago

Age

since listed · data leaked

Status timeline

ListedSep 7, 2026
Data leakeddate unknown

At a glance

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

About the victim

AI dossier — public-source company profile

NorthShore Health Centers is a health clinic operating in Hammond and Portage, Indiana. The organization provides healthcare services in the Indiana region.

Industry: Healthcare
Address: Hammond & Portage, IN, US

Attack summary

Severity: low — The post contains only an announcement with no proof files, no detailed description of data exfiltrated, and no operational impact stated. No sensitive data inventory is disclosed.

The insomnia group claims to have obtained data from NorthShore Health Centers and announces that data will be published soon, but no specific details about exfiltrated data types or operational disruption are provided in the leak post.

low

What the group claims

NorthShore Health Centers offers comprehensive care in Indiana, including behavioral health, dental, pediatrics, and women’s health. It runs multiple health centers and mobile units across Porter, Lake, La Porte, and Jasper counties.

The leak post

captured from the group's site

What is 7 + 6 = ?
NorthShore Health Centers offers comprehensive care in Indiana, including behavioral health, dental, pediatrics, and women’s health. It runs multiple health centers and mobile units across Porter, Lake, La Porte, and Jasper counties.
Maglin Miskiv & Associates in Parsippany, NJ offers personalized accounting, tax planning, bookkeeping, payroll, financial consulting, tax prep, and audit support for individuals and businesses.
A comprehensive foot and ankle treatment center with five locations in the Tulsa Metro area. They offer a range of services including treatment for common foot pains, deformities, and injuries, and provide same-day appointments for urgent needs.
Aurora Health Management, LLC operates a skilled nursing and rehab center in Frederick, MD. With nearly 25 years in long-term care, it improves troubled facilities through comprehensive management, programs, and Medicare/Medicaid standards.
Commercial and Service Industry Machinery Manufacturing
Private company supplying welding, cutting, finishing products and services across North/Central/South America. Offers equipment, tools, accessories, consumables - from mobile units to robotic systems. Oil indu…

Screenshot of the leak post

Leak screenshot for NorthShore Health Centers

Sources

Victim sitewww.northshorehealth.org
Leak posthttp://i62huw7ve22rpyw6lnq3kmfump2dmsg4xpveec3ere73njwatrz74gad.onion/Company/NorthShore/

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 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 48 public disclosures across our corpus. First observed on a leak site on February 7, 2026; most recent post September 7, 2026. The operation is currently active.

Timeline of this disclosure

September 7, 2026NorthShore Health Centers listed by insomnia on the group's public leak site

Other recent disclosures by insomnia

insomnia has been linked to 48 public victims on Darkfield. A sample of the most recent:

See the full insomnia 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, NorthShore Health Centers is reported in United States, a country with 3,165 ransomware disclosures in our corpus.

If your organisation is affected

A listing by insomnia means NorthShore Health Centers 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 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.