Was J.S.T. Espana hit by ransomware?

J.S.T. Espana was listed by the Meow ransomware operation (Spain), 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 Meow ransomware group?

Meow 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 J.S.T. Espana breach?

Meow published data attributed to J.S.T. Espana (~52 GB). Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

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J.S.T. España, S.A.

listed as J.S.T. Espana · Claimed by Meow · listed 2 years ago

52 GB

Data size

20m

Age

since listed · data leaked

Status timeline

ListedNov 14, 2024
Data leakeddate unknown

At a glance

Group: Meow
Status: Data leaked
Country: Spain
Sector: Manufacturing
Listed on leak site: Nov 14, 2024
Data size: 52 GB

About the victim

AI dossier — public-source company profile

J.S.T. España, S.A. is the Spanish subsidiary of JST MFG CO., LTD. (founded 1957 in Japan, headquartered in Osaka), specializing in the design, manufacturing, and distribution of solderless connectors and terminals for automotive, appliances, telecommunications, and electronics industries. Operating from a 2,000 m² facility in Montcada i Reixac, Barcelona, the company serves customers across Spain and Portugal.

Industry: Electrical Connectors & Terminals Manufacturing
Address: Montcada i Reixac, Barcelona, Spain
Employees: 51-200
Founded: 1981

Attack summary

Severity: critical — Confirmed exfiltration of 52 GB including regulated sensitive data: employee PII at scale with identity documents (passports, driver's licenses), medical records, financial documents (bank statements, invoices), and client data. This meets critical threshold for regulated/sensitive data exposure.

The Meow group claims to have exfiltrated over 52 GB of confidential data from J.S.T. España, including employee personal data, client information, financial documents, tax records, production documents, and medical records. No ransom demand is stated; the group has published the data on their leak site.

critical

Data the group says was taken

AI dossier — extracted from the leak post

Employee personal details and identification documents
Passport and driver's license scans
Client contact details and order histories
Commercial contracts and agreements
Financial documents (invoices, payment confirmations, bank statements)
Tax documentation and accounting records
Quality control and production documents
Medical records (prescriptions, reports, lab results)
Dates of birth and identification data

What the group claims

Dear customers!We are pleased to offer exclusive access to over 52 GB of confidential data from J.S.T. España, S.A., the Spanish subsidiary of the renowned Japanese multinational JST MFG CO., LTD., headquartered in Osaka. Founded in 1981, J.S.T. España specializes in the manufacturing and distribution of connectors and terminals for the electrical and electronics industries, delivering high quality and reliable solutions.J.S.T. España serves diverse sectors such as automotive, appliances, and telecommunications, offering a comprehensive range of connectors, terminals, and accessories designed to ensure secure and efficient connections. The company also provides customized solutions, designing and manufacturing tailored connectors to meet the unique requirements of its clients.Located in Montcada i Reixac, Barcelona, J.S.T. España operates from a 2,000 square meter facility, handling orders across Spain and Portugal. With over 50 years of expertise from its parent company, J.S.T. has established itself as a leader in the industry, driven by constant innovation and a commitment to product quality.This comprehensive data pack includes: Employee data personal details, passport and drivers license scans. Client information contact details, order histories. Contracts and commercial agreements. Financial documents invoices, payment confirmations, bank statements, commercial invoices. Tax documentation accounting records, tax claims, and notifications. Quality control and production documents requests for production changes, orders, deliveries. Personal data dates of birth, identification documents. Medical records prescription information, medical reports, lab results. And much more.These records provide unique insights into J.S.T. Españas operations, making this data pack valuable to professionals in electronics manufacturing, supply chain management, business analysis, and related fields.To access th

Sources

Victim sitejst.es
Leak posthttp://meow6xanhzfci2gbkn3lmbqq7xjjufskkdfocqdngt3ltvzgqpsg5mid.onion/product/131

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 Meow

Meow is a relatively new ransomware group that emerged in November 2023, primarily motivated by financial gain through extortion activities targeting organizations across multiple sectors. The group has compromised at least 145 known victims in a short operational timeframe, demonstrating rapid scaling of their criminal enterprise. Based on their targeting patterns, Meow appears to focus heavily on English-speaking countries, with the United States, United Kingdom, and Canada representing their primary victim base, though they have also expanded operations to include targets in Italy and Colombia. The group shows a preference for attacking business services organizations, manufacturing companies, healthcare institutions, and agriculture and food production entities, suggesting they may employ broad-spectrum targeting rather than highly specialized sector focus. Their emergence in late 2023 and the significant victim count achieved in a relatively short period indicates either a sophisticated operation with experienced operators or potential links to existing ransomware ecosystems, though specific details about their attack methodology, initial access vectors, encryption techniques, or data exfiltration practices have not been extensively documented by major threat intelligence sources. Given the recent timeline of their emergence and limited public reporting from established security researchers, detailed technical analysis of their tools, tactics, and procedures remains sparse. The group appears to remain active as of current reporting, though comprehensive law enforcement actions or major disruption efforts have not been publicly documented. The group has been linked to 145 public disclosures across our corpus. First observed on a leak site on November 24, 2023; most recent post November 19, 2024. The operation is currently inactive.

Timeline of this disclosure

November 14, 2024J.S.T. Espana listed by Meowon the group's public leak site

Data size: 52 GB

Other recent disclosures by Meow

Meow has been linked to 145 public victims on Darkfield. A sample of the most recent:

See the full Meow dossier →

Sector and geography

This disclosure adds to ransomware activity in the Manufacturing sector, which has 3,681 disclosures indexed across all operators we track. Geographically, J.S.T. Espana is reported in Spain, a country with 351 ransomware disclosures in our corpus.

If your organisation is affected

A listing by Meow means J.S.T. Espana 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, INCIBE-CERT (Spain), as required for your jurisdiction.
Monitor for the data appearing on Meow'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.