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Cyber Threat
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Ransomware victim Healthcare

mankatoclinic.com

Listed by Chaos on · organisation based in United States

mankatoclinic.com

Disclosed
Sep 10, 2026
Leak-site listing date
Threat group
Chaos
105 victims listed
Country
United States
#1 most targeted
Sector
Healthcare

ThreatAI analysis

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

About mankatoclinic.com

The Mankato Clinic was founded Mankato, Minnesota in 1916, by five area physicians who believed that a comprehensive, multi-specialty group practice offered the best means of providing quality health care to the residents of southern Minnesota. The mission of the Mankato Clinic is to improve the hea…

Source record: ransomware.live

About the Chaos group

Chaos is a ransomware-as-a-service operation that emerged in early 2025, likely formed by former BlackSuit/Royal members, offering cross-platform ransomware for Windows, Linux, ESXi, and NAS to affiliates recruited on the RAMP dark web forum, excluding CIS/BRICS countries and hospitals from targeting. Chaos has listed 95 victims since February 2025.

Incident analysis

mankatoclinic.com was listed by Chaos ransomware, a group with 105 victims recorded in this database. The listing appeared on the group's leak site on September 10, 2026.

mankatoclinic.com is based in United States and operates in the Healthcare sector. United States ranks #1 worldwide for ransomware disclosures, with 10,138 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.

Chaos 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files are encrypted, so the victim faces two demands at once — pay to restore access, and pay to keep stolen data unpublished.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 mankatoclinic.com attacked by ransomware?

Yes. mankatoclinic.com was listed as a victim of the Chaos ransomware group on September 10, 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 mankatoclinic.com?

mankatoclinic.com was attacked by Chaos ransomware. Chaos is one of the most active ransomware groups, having claimed 105 victims globally. The group typically employs a double-extortion model: encrypting the victim's files and threatening to publish stolen data.

When did the mankatoclinic.com ransomware attack occur?

The ransomware attack on mankatoclinic.com was disclosed on September 10, 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 mankatoclinic.com ransomware attack?

The specific data stolen from mankatoclinic.com 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, mankatoclinic.com likely held patient records, medical data, and personally identifiable information (PII).

How can organisations protect against Chaos attacks?

To defend against Chaos 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.