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Ransomware Victim Healthcare

TIVOLI-33

Ransomware attack by Helldown · Disclosed November 6, 2024 · 🇫🇷 France

tivoli-33.org

Date Disclosed
Nov 6, 2024
2024
Threat Group
Helldown
36 total victims
Country
🇫🇷 France
Industry
Healthcare

ThreatAI Analysis

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

About the Helldown group

Helldown is an aggressive ransomware group first documented in August 2024, known for exploiting Zyxel firewall vulnerabilities to gain initial access and conducting large-scale data exfiltration averaging 70 GB per victim, targeting IT services, telecommunications, manufacturing, and healthcare primarily in the US. Helldown has listed 36 victims since August 2024.

Incident Analysis

TIVOLI-33 was targeted by Helldown ransomware, one of the most active ransomware groups in our database with 36 confirmed victims globally. The attack was disclosed on November 6, 2024, when TIVOLI-33 appeared on the group's dark web leak site.

TIVOLI-33 is based in France , operating in the Healthcare sector. France ranks #6 globally for ransomware attacks, with 528 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 — all factors that increase ransom payment pressure.

Helldown 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 — 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: Sep 20, 2026 04:00 UTC.

Frequently Asked Questions

Was TIVOLI-33 attacked by ransomware?

Yes. TIVOLI-33 was listed as a victim of the Helldown ransomware group on November 6, 2024. The organisation is based in France and operates in the Healthcare sector. The disclosure appeared on the group's dark web leak site.

Which ransomware group attacked TIVOLI-33?

TIVOLI-33 was attacked by Helldown ransomware. Helldown is one of the most active ransomware groups, having claimed 36 victims globally. The group typically employs a double-extortion model: encrypting the victim's files and threatening to publish stolen data.

When did the TIVOLI-33 ransomware attack occur?

The ransomware attack on TIVOLI-33 was disclosed on November 6, 2024. 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 TIVOLI-33 ransomware attack?

The specific data stolen from TIVOLI-33 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, TIVOLI-33 likely held patient records, medical data, and personally identifiable information (PII).

How can organisations protect against Helldown attacks?

To defend against Helldown 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.