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Cyber Threat
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Ransomware victim Healthcare

NorthShore Health Centers

Listed by Insomnia on · organisation based in United States

www.northshorehealth.org

Disclosed
Sep 7, 2026
Leak-site listing date
Threat group
Insomnia
59 victims listed
Country
United States
#1 most targeted
Sector
Healthcare

ThreatAI analysis

Compiled from this incident record and the threat intelligence profile for Insomnia. Figures and technique mappings are quoted from the source data, not inferred.

About NorthShore Health Centers

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.

Source record: ransomware.live

About the Insomnia group

Insomnia is a data-theft and extortion group that emerged in October 2025, targeting primarily US-based healthcare organizations — stealing patient files and threatening public exposure rather than encrypting files — and avoiding former Soviet states, consistent with Russian-speaking cybercrime norms. Insomnia has listed 53 victims since February 2025.

Incident analysis

NorthShore Health Centers was listed by Insomnia ransomware, a group with 59 victims recorded in this database. The listing appeared on the group's leak site on September 7, 2026.

NorthShore Health Centers is based in United States and operates in the Healthcare sector. United States ranks #1 worldwide for ransomware disclosures, with 10,292 victims in this database.

Sector context. Healthcare organisations are high-value ransomware targets because patient data is extremely sensitive, regulatory penalties for breaches are severe, and operational downtime can threaten patient safety — all factors that increase ransom payment pressure.

Insomnia typically follows a double extortion model: data is exfiltrated from the victim's systems before files are encrypted, so the victim faces two demands at once — pay to restore access, and pay to keep stolen data unpublished. The leak site, where this listing appeared, is the lever for the second demand.

Source. Public leak-site disclosures aggregated via the ransomware.live API. The disclosure date is when the listing was published, which can differ from the date of compromise. This site does not publish or link to stolen data. Last updated .

Frequently asked questions

Was NorthShore Health Centers attacked by ransomware?

Yes. NorthShore Health Centers was listed as a victim of the Insomnia ransomware group on September 7, 2026. The organisation is based in United States and operates in the Healthcare sector. The disclosure appeared on the group's dark web leak site.

Which ransomware group attacked NorthShore Health Centers?

NorthShore Health Centers was attacked by Insomnia ransomware. Insomnia is one of the most active ransomware groups, having claimed 59 victims globally. The group typically employs a double-extortion model: encrypting the victim's files and threatening to publish stolen data.

When did the NorthShore Health Centers ransomware attack occur?

The ransomware attack on NorthShore Health Centers was disclosed on September 7, 2026. This date reflects when the victim was published on the threat group's leak site, which may differ from the actual date of initial compromise.

What data was stolen in the NorthShore Health Centers ransomware attack?

The specific data stolen from NorthShore Health Centers has not been independently verified by this platform. Ransomware groups typically exfiltrate data before encrypting systems and use the threat of publication to pressure victims. As a Healthcare organisation, NorthShore Health Centers likely held patient records, medical data, and personally identifiable information (PII).

How can organisations protect against Insomnia attacks?

To defend against Insomnia and similar threat actors, organisations should: maintain regular offline backups tested for restoration; implement network segmentation to limit lateral movement; deploy multi-factor authentication on all remote access; use endpoint detection and response (EDR) tools; conduct regular phishing and security awareness training; and monitor threat intelligence feeds for indicators of compromise (IOCs) associated with active groups.