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Ransomware Victim Healthcare

JBS

Ransomware attack by Medusa ยท Disclosed December 28, 2025 ยท ๐Ÿ‡บ๐Ÿ‡ธ United States

Date Disclosed
Dec 28, 2025
2025
Threat Group
Medusa
372 total victims
Country
๐Ÿ‡บ๐Ÿ‡ธ United States
Industry
Healthcare

Incident Analysis

JBS was targeted by Medusa ransomware, one of the most active ransomware groups in our database with 372 confirmed victims globally. The attack was disclosed on December 28, 2025, when JBS appeared on the group's dark web leak site.

JBS is based in United States , operating in the Healthcare sector. United States ranks #1 globally for ransomware attacks, with 8,987 victims in our 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 โ€” all factors that increase ransom payment pressure.

Medusa typically employs a double extortion model: first exfiltrating sensitive data from the victim's systems, then deploying ransomware to encrypt files. Victims face two simultaneous threats โ€” paying to restore access and paying to prevent publication of stolen data. The group's leak site publishes victim names and exfiltrated data as leverage.

Data source: This incident record is sourced from public ransomware group leak site disclosures aggregated via the ransomware.live API. Disclosure date reflects when the victim was published on the leak site, which may differ from the initial date of compromise. This platform does not publish or link to stolen data. Last data update: Aug 4, 2026 10:00 UTC.

Frequently Asked Questions

Was JBS attacked by ransomware?

Yes. JBS was listed as a victim of the Medusa ransomware group on December 28, 2025. 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 JBS?

JBS was attacked by Medusa ransomware. Medusa is one of the most active ransomware groups, having claimed 372 victims globally. The group typically employs a double-extortion model: encrypting the victim's files and threatening to publish stolen data.

When did the JBS ransomware attack occur?

The ransomware attack on JBS was disclosed on December 28, 2025. 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 JBS ransomware attack?

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

How can organisations protect against Medusa attacks?

To defend against Medusa 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.