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Cyber Threat
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Ransomware victim Manufacturing

Undefasa

Listed by Blacknevas on · organisation based in Spain

www.undefasa.com

Disclosed
Oct 13, 2025
Leak-site listing date
Threat group
Blacknevas
50 victims listed
Country
Spain
#9 most targeted
Sector
Manufacturing

ThreatAI analysis

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

About the Blacknevas group

BlackNevas is a ransomware group first observed in November 2024, believed to be derived from the Trigona ransomware family, targeting telecommunications, manufacturing, medical, and legal industries primarily in Asia-Pacific, the UK, Italy, and Lithuania using double-extortion with a dual AES/RSA encryption scheme. Blacknevas has listed 47 victims since April 2023.

Incident analysis

Undefasa was listed by Blacknevas ransomware, a group with 50 victims recorded in this database. The listing appeared on the group's leak site on October 13, 2025.

Undefasa is based in Spain and operates in the Manufacturing sector. Spain ranks #9 worldwide for ransomware disclosures, with 470 victims in this database.

Sector context. Manufacturing companies are frequently targeted because production downtime directly translates to financial loss. Ransomware operators exploit this time-sensitivity to demand higher ransoms and faster payment.

Blacknevas typically follows a double extortion model: data is exfiltrated from the victim's systems before files are encrypted, so the victim faces two demands at once — pay to restore access, and pay to keep stolen data unpublished. The leak site, where this listing appeared, is the lever for the second demand.

Source. Public leak-site disclosures aggregated via the ransomware.live API. The disclosure date is when the listing was published, which can differ from the date of compromise. This site does not publish or link to stolen data. Last updated .

Frequently asked questions

Was Undefasa attacked by ransomware?

Yes. Undefasa was listed as a victim of the Blacknevas ransomware group on October 13, 2025. The organisation is based in Spain and operates in the Manufacturing sector. The disclosure appeared on the group's dark web leak site.

Which ransomware group attacked Undefasa?

Undefasa was attacked by Blacknevas ransomware. Blacknevas is one of the most active ransomware groups, having claimed 50 victims globally. The group typically employs a double-extortion model: encrypting the victim's files and threatening to publish stolen data.

When did the Undefasa ransomware attack occur?

The ransomware attack on Undefasa was disclosed on October 13, 2025. 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 Undefasa ransomware attack?

The specific data stolen from Undefasa 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 Manufacturing organisation, Undefasa likely held sensitive business data, client information, and operational records.

How can organisations protect against Blacknevas attacks?

To defend against Blacknevas 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.