Was HAL Allergy hit by ransomware?

HAL Allergy was listed by the Ransomhouse ransomware operation (Netherlands), and stolen data was published on the group's leak site. Darkfield tracks this disclosure with the original leak post, screenshot and group context.

Who is the Ransomhouse ransomware group?

Ransomhouse is a ransomware operator tracked by Darkfield. See the full operator dossier for its known victims, sectors targeted, IOCs and leak-site infrastructure.

What data was leaked in the HAL Allergy breach?

Ransomhouse published data attributed to HAL Allergy (~743 GB). Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

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HAL Allergy

Claimed by Ransomhouse · listed 2 years ago

743 GB

Data size

$740

Ransom

demanded

28m

Age

since listed · data leaked

Status timeline

ListedFeb 28, 2024
Data leakeddate unknown

At a glance

Group: Ransomhouse
Status: Data leaked
Country: Netherlands
Sector: Healthcare
Listed on leak site: Feb 28, 2024
Data size: 743 GB
Ransom demanded: $740

About the victim

AI dossier — public-source company profile

HAL Allergy is a healthcare provider specializing in allergy treatment and management. Limited public information is available about the organization's size, location, or operational details.

Industry: Healthcare - Allergy & Immunology

Attack summary

Severity: high — Healthcare provider with confirmed data exfiltration of 743 GB; medical records constitute regulated PII under HIPAA and similar frameworks. Data publication confirms breach beyond encryption alone.

Ransomware group Ransomhouse claims to have encrypted HAL Allergy's systems and exfiltrated approximately 743 GB of data. The group is demanding $740 in ransom and has published the victim on their leak site.

high

Data the group says was taken

AI dossier — extracted from the leak post

Patient medical records
Healthcare data
Operational files

What the group claims

HAL Allergy is one of the European top players in the development, production and distribution of allergen immunotherapies for the treatment and prevention of allergic diseases. With a highly competitive product portfolio, including subcutaneous and sublingual products, and a future-oriented pipeline portfolio, HAL Allergy strives to provide the best possible medical products and scientific output. HAL Allergy is located in the Bio Science Park in Leiden, The Netherlands.

The leak post

captured from the group's site

```
{"data":[{"id":"a1894b76b7004c75a3a0845799af49956592e3d9","display":"animated","header":"HOT NEWS","info":" Trellix is a global cybersecurity company.","url":"","sort":1,"views":"436242"},{"id":"336b257f582b17573c97578efd4b22762bf77344","sort":2,"header":"Trellix (McAfee & FireEye)","url":"https://www.trellix.com/","private":"false","revenue":"1.5-2 B$","employees":"5000","info":"Trellix is a global cybersecurity company formed from the October 2021 merger of McAfee Enterprise and FireEye. It provides services to over 50,000 business and government customers worldwide, protecting more than 200 million endpoints. The companys open and native extended detection and response (XDR) platform helps organizations confronted by todays most advanced threats gain confidence in the protection and resilience of their operations. Trellix, along with an extensive partner ecosystem, accelerates technology innovation through machine learning and automation to empower over 40,000 business and government customers with living security","statusDate":"DEPENDS ON YOU","status":"EVIDENCE","published":"NOT YET","action":"Encrypted","actionDate":"17/04/2026","volume":"~","content":"cybersecurity.html"…

Sources

Source

Indexed 2 years ago

This page surfaces a public ransomware disclosure indexed by Darkfield. Original posts come from the operator's own leak site; we cross-check against ransomware.live, RansomLook and RansomWatch where applicable. Share this URL freely.

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Disclosure context

About Ransomhouse

Ransomhouse is a ransomware group that emerged in June 2021, operating primarily for financial gain through extortion campaigns targeting organizations across multiple sectors globally. The group's origin and specific affiliations remain unclear based on publicly available intelligence, though their operational patterns suggest they function as an independent cybercriminal organization rather than a traditional ransomware-as-a-service model. Ransomhouse employs double extortion tactics, stealing sensitive data before deploying their ransomware payload and threatening to publish the information on their leak site if victims refuse to pay the demanded ransom. The group has demonstrated a broad targeting approach, with documented attacks against 187 victims primarily concentrated in the United States, China, United Kingdom, Italy, and Spain, focusing heavily on healthcare, technology, business services, and manufacturing sectors. While specific high-profile campaigns have not been extensively documented by major security firms, the group's consistent victim count and geographic distribution indicate sustained operational capability since their emergence. As of current reporting, Ransomhouse remains active with no known major law enforcement disruptions or confirmed rebranding efforts. The group has been linked to 210 public disclosures across our corpus. First observed on a leak site on June 1, 2021; most recent post June 29, 2026. The operation is currently active.

Also tracked as: RANSOM HOUSE.

Timeline of this disclosure

February 28, 2024HAL Allergy listed by Ransomhouseon the group's public leak site

Data size: 743 GB
Ransom demanded: $740

Other recent disclosures by Ransomhouse

Ransomhouse has been linked to 210 public victims on Darkfield. A sample of the most recent:

See the full Ransomhouse dossier →

Sector and geography

This disclosure adds to ransomware activity in the Healthcare sector, which has 2,600 disclosures indexed across all operators we track. Geographically, HAL Allergy is reported in Netherlands, a country with 150 ransomware disclosures in our corpus.

If your organisation is affected

A listing by Ransomhouse means HAL Allergy appeared on a ransomware extortion site and data attributed to it has been published. If this is your organisation, or a supplier you depend on, the priority is to confirm the intrusion and contain it before the window to act closes.

Engage your incident-response team and preserve forensic evidence before remediating — do not wipe affected systems first.
Force a password reset and revoke active sessions for exposed accounts; rotate any credentials, API keys or certificates that may have been in the stolen data.
Assess regulatory notification duties (GDPR, NIS2, sector regulators) — many carry a 72-hour reporting clock from awareness.
Report the incident to your national CERT, NCSC-NL (Netherlands), as required for your jurisdiction.
Monitor for the data appearing on Ransomhouse's leak site and across paste and breach channels, and brief downstream partners who may be exposed through you.

How we know this. Darkfield monitors public ransomware leak sites continuously, archiving every new disclosure and the data later released against the victim. Each entry on this page is sourced from the operator's own publication and cross-checked against complementary OSINT feeds (RansomLook, ransomware.live, RansomWatch). We do not collect or host stolen data — only the metadata, timestamps and screenshots needed to make the public disclosure searchable and accountable. Records here are corrected when the original post is edited, retracted, or merged with another disclosure.