Matadero de Gijón - Biogas energy plant - mataderodegijon.es Listed by ransomhub Ransomware Group: Ransomware Claim — What’s Alleged & What To Do

On 16 May 2024 the RansomHub ransomware group listed Matadero de Gijón - Biogas energy plant - mataderodegijon.es on its leak site, claiming to have exfiltrated internal files during a ransomware attack. Public detail remains limited: the number of people affected is unknown, the precise contents of the files have not been independently confirmed, and the group itself marked the material as unpublished at the time of listing. The claim is significant because the organisation operates both a slaughterhouse and an associated biogas energy facility, environments that routinely process operational, commercial and personnel records.

What is known so far rests solely on the group’s own listing and the sparse accompanying metadata. No independent verification of the intrusion, the method used, or the full scope of any data removal has been made public. Readers should treat the listing as an unverified claim until further evidence appears.

What happened

According to the RansomHub listing dated 16 May 2024, the group asserts that it conducted a ransomware attack against Matadero de Gijón - Biogas energy plant - mataderodegijon.es and exfiltrated internal files. The listing records a data size of 15 GB and notes 90 visits to the entry; it also states that the material had not been published. No further technical details—such as the initial access vector, the date of the intrusion itself, encryption of systems, or any ransom demand—have been disclosed in the available record. The number of individuals whose information may be involved remains unknown. Because the group marked the data as unpublished, it is not possible to confirm from public sources whether any files have since been released or sold.

The group behind it: ransomhub

RansomHub is a ransomware-as-a-service operation that became publicly active in early 2024, attracting attention after the disruption of other major ransomware brands. Like many contemporary groups, it typically gains access to networks, steals data, encrypts systems, and then threatens to publish the stolen material on a dedicated leak site if a ransom is not paid. The group has been observed listing victims across multiple sectors and geographies, often providing limited metadata such as claimed data volume and publication status. Its listings are claims made by the operators themselves; they do not constitute independent confirmation that an organisation was compromised or that the stated volume of data was taken. In this instance the only assertion specific to Matadero de Gijón is the leak-site entry itself, which reports 15 GB of internal files and an unpublished status.

Matadero de Gijón - Biogas energy plant - mataderodegijon.es and its sector

Matadero de Gijón operates a slaughterhouse and an associated biogas energy plant in the Gijón area of Spain, under the domain mataderodegijon.es. Facilities of this type process livestock, manage waste streams for energy conversion, and maintain commercial relationships with suppliers, transporters, retailers and regulatory bodies. They typically hold employee records, contractor details, veterinary and health certificates, production logs, financial and procurement data, and operational documentation related to both meat processing and biogas generation. A breach at such an organisation can therefore touch both industrial control and administrative systems, raising concerns that extend beyond pure data privacy into supply-chain continuity and regulatory compliance. Public information does not indicate whether the claimed intrusion affected the biogas plant’s control systems, the slaughterhouse operations, or only administrative networks; that distinction remains undisclosed.

The information in question

The sole description provided in the listing is “internal files exfiltrated in ransomware attack,” with a claimed volume of 15 GB. No inventory of file types, no sample documents, and no confirmation of personal data categories have been released. Organisations in the meat-processing and biogas sectors commonly store employee personal data, supplier contracts, health and safety records, veterinary documentation, financial ledgers and operational logs. Whether any of those categories were among the claimed 15 GB cannot be verified from the public record. The listing’s “Published: False” status further indicates that, at the time of reporting, the group had not made the material available for download. Exact contents therefore remain unconfirmed.

What's at stake

If internal files were in fact removed, individuals whose details appear in employee, contractor or supplier records could face risks of identity misuse, targeted phishing or unsolicited contact. For the organisation the consequences may include regulatory scrutiny under data-protection rules, disruption of commercial relationships, and the need to review both IT and operational technology security. Because the biogas plant converts organic waste into energy, any compromise that extended to industrial systems could also raise questions about process integrity, though no evidence of such impact has been made public. The absence of confirmed publication means that widespread secondary distribution of the data has not been observed, yet the mere existence of an unverified 15 GB claim still requires careful monitoring by those who may be connected to the facility.

Were you affected?

If you have worked for, supplied, or otherwise shared personal or commercial information with Matadero de Gijón or its biogas operations, treat the listing as a prompt to review your own exposure. Change passwords associated with any accounts that used work email addresses, enable multi-factor authentication where available, and monitor financial and credit statements for unusual activity. You can also run a free exposure scan of your email address against known breach data sets to check whether your details have already appeared in previously published collections. Continue to watch for official statements from the organisation or Spanish data-protection authorities, as further confirmed information may emerge over time.

AICompiled with AI assistance from public sources and published under our editorial standards.