Cyber Threat Intelligence
CTI Academy Sponsor CTI Academy
HA
Ransomware Victim Healthcare

HAL Allergy

Ransomware attack by Ransomhouse · Disclosed February 28, 2024 · 🇳🇱 Netherlands

hal-allergy.com

Date Disclosed
Feb 28, 2024
2024
Threat Group
Ransomhouse
149 total victims
Country
🇳🇱 Netherlands
Industry
Healthcare

ThreatAI Analysis

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

About the Ransomhouse group

RansomHouse is a double-extortion RaaS operation active since late 2021, attributed to the threat actor "Jolly Scorpius," targeting over 120 organizations across healthcare, finance, transportation, and government, recently upgrading to a multi-layered dual-key encryption architecture. Ransomhouse has listed 206 victims since June 2021.

Incident Analysis

HAL Allergy was targeted by Ransomhouse ransomware, one of the most active ransomware groups in our database with 149 confirmed victims globally. The attack was disclosed on February 28, 2024, when HAL Allergy appeared on the group's dark web leak site.

HAL Allergy is based in Netherlands , operating in the Healthcare sector. Netherlands ranks #21 globally for ransomware attacks, with 135 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.

Ransomhouse 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 17, 2026 12:00 UTC.

Frequently Asked Questions

Was HAL Allergy attacked by ransomware?

Yes. HAL Allergy was listed as a victim of the Ransomhouse ransomware group on February 28, 2024. The organisation is based in Netherlands and operates in the Healthcare sector. The disclosure appeared on the group's dark web leak site.

Which ransomware group attacked HAL Allergy?

HAL Allergy was attacked by Ransomhouse ransomware. Ransomhouse is one of the most active ransomware groups, having claimed 149 victims globally. The group typically employs a double-extortion model: encrypting the victim's files and threatening to publish stolen data.

When did the HAL Allergy ransomware attack occur?

The ransomware attack on HAL Allergy was disclosed on February 28, 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 HAL Allergy ransomware attack?

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

How can organisations protect against Ransomhouse attacks?

To defend against Ransomhouse 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.