Was Undefasa hit by ransomware?

Undefasa was listed by the blacknevas 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 blacknevas ransomware group?

blacknevas 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 Undefasa breach?

blacknevas published data attributed to Undefasa (~2.3 TB), around 102634 files records. Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

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Undefasa

Claimed by Blacknevas · listed 9 months ago

2.3 TB

Data size

102634 files records

Age

since listed · data leaked

Status timeline

ListedOct 13, 2025
Data leakeddate unknown

At a glance

Group: Blacknevas
Status: Data leaked
Country: Spain
Sector: Manufacturing
Listed on leak site: Oct 13, 2025
Data size: 2.3 TB
Records: 102634 files

About the victim

AI dossier — public-source company profile

Undefasa (Undefasa, S.A.) is a family-owned Spanish ceramics manufacturer founded in 1967 and headquartered in L'Alcora, Castellón. The company designs and produces ceramic wall and floor tiles, including a premium technical porcelain range (SOLID+), distributing products internationally and participating in major industry trade shows such as Cersaie and Coverings. It operates with an integrated management system certified to ISO 50001 and has received EU co-funded investment for energy-efficient manufacturing.

Industry: Ceramic Tiles & Technical Porcelain Manufacturing
Address: Carrer de la Carretera de Ribesalbes, s/n, 12110 L'Alcora, Castelló, Spain
Founded: 1967

Attack summary

Severity: high — 2.3 TB of data (102,634 files) has been fully published via a public file-sharing link, confirming exfiltration and disclosure of significant business data at scale; while the specific content is not itemised, the volume strongly suggests it includes sensitive internal business, employee, and commercial records.

The blacknevas ransomware group claims to have exfiltrated 2.3 TB of data comprising 102,634 files from Undefasa and has published a download link (gofile.io), indicating full data publication rather than encryption-only.

high

Data the group says was taken

AI dossier — extracted from the leak post

102,634 files (2.3 TB total)
Corporate/business documents
Potentially employee and HR records
Potentially financial and operational data
Potentially customer and supplier information

The group's post references roughly 1 proof file.

What the group claims

Ceramicists since 1967We are a family-run business that was established in the heat of the Sierra, and since then Undefasa has made its mark at the heart of Spain’s thriving ceramics industry.Over the years, we have cemented our position with the firm belief that each of our products truly reflects the tradition and passion of well-crafted ceramics.These values have been shaped by our long history, experience, hard work and dedication.To transmit our passion for ceramics to our customers, through unique products, which provide the habitat with safety values due to their quality and differentiation.Versatile and excellent products in terms of their design that remain durable and unalterable over time, both for their style and the resistance of their materials.At Undefasa, the human factor is fundamental to our corporate culture. We firmly believe that only by creating a strong culture can we generate lasting value over time, building on and enhancing the experience of the past.The concepts of design and innovation thus take on a more significant value as they coexist with the company’s memory and heritage.We work with an integrated management system based on continuous improvement in all phases of the production process, from conception and design to the distribution and sale of our materials.As a family-owned company, we have undergone a process of constant evolution and adaptation as we have faced the changing environment.Throughout our history, we have learned to respond flexibly to challenges, always striving for excellence.A company rooted in the past and looking to the future.We strive to meet the expectations of consumers and their current demands through the generation of new ideas, innovation and design.To transmit our passion for ceramics to our customers, through unique products that bring to the habitat safety values for their quality and differentiation.Multipurpose products, and excellent in terms of design that remain durable and unalterable over time, both for its style and the strength of its materials.Our premise is to design products that coexist with us, that add value and allow us to create unique spaces._ALWAYS BESIDE YOUOur motto “Always beside you” is our raison d’être, always close to our customers102634 files2.3 TBhttps://gofile.io/d/2teefQ

Sources

Source

Indexed 9 months 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 blacknevas

Blacknevas is an emerging ransomware group that was first observed in August 2025, appearing to be primarily financially motivated based on their targeting patterns and operational characteristics. The group's origin and potential affiliations remain unclear due to limited public documentation from established threat intelligence sources, though their diverse geographic targeting suggests either a distributed operation or broad opportunistic approach. Based on available victim data, Blacknevas has compromised at least 23 organizations across multiple countries, with the United States, Spain, India, Japan, and Thailand being the most frequently targeted nations, while their sector focus spans technology, manufacturing, energy, and consumer services industries, suggesting they employ opportunistic rather than sector-specific targeting methodologies. The group's attack vectors, specific tools, and whether they operate as a Ransomware-as-a-Service model or maintain independent operations have not been publicly documented by major cybersecurity firms or government agencies. Due to the group's recent emergence in August 2025, there is insufficient public reporting from established sources like CISA, FBI, or major threat intelligence providers to detail notable campaigns or significant attacks beyond the confirmed victim count. Given the recency of their first observed activity, Blacknevas appears to remain active as of late 2025, though comprehensive threat intelligence profiles from authoritative sources have yet to be published. The group has been linked to 36 public disclosures across our corpus. First observed on a leak site on August 6, 2025; most recent post July 14, 2026. The operation is currently active.

Also tracked as: black nevas.

Timeline of this disclosure

October 13, 2025Undefasa listed by blacknevason the group's public leak site

Data size: 2.3 TB
Records: 102634 files

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, Undefasa is reported in Spain, a country with 351 ransomware disclosures in our corpus.

If your organisation is affected

A listing by blacknevas means Undefasa 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 blacknevas'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.