Cyber Threat Intelligence
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Ransomware Victim Financial Services

FIDUCIAL

Ransomware attack by Lamashtu · Disclosed September 30, 2026 · 🇫🇷 France

fiducial.fr

Date Disclosed
Sep 30, 2026
2026
Threat Group
Lamashtu
44 total victims
Country
🇫🇷 France
Industry
Financial Services

ThreatAI Analysis

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

FIDUCIAL was listed on Lamashtu's dark web leak site on 30 September 2026 and is based in France operating in the Financial Services sector.

About the Lamashtu group

Lamashtu is an extortion group that first appeared in April 2026, claiming attacks against organizations in France, Romania, and Thailand across energy, pharmaceutical, and film sectors; it has not yet been confirmed as operating actual file-encrypting ransomware rather than pure data-theft extortion. Lamashtu has listed 34 victims since April 2026.

Incident Analysis

FIDUCIAL was targeted by Lamashtu ransomware, one of the most active ransomware groups in our database with 44 confirmed victims globally. The attack was disclosed on September 30, 2026, when FIDUCIAL appeared on the group's dark web leak site.

FIDUCIAL is based in France , operating in the Financial Services sector. France ranks #6 globally for ransomware attacks, with 538 victims in our database.

Sector context: Financial sector organisations are targeted for their access to funds, sensitive financial data, and the reputational damage a public breach can cause. Regulatory requirements also increase recovery costs.

Lamashtu typically employs a double extortion model: first exfiltrating sensitive data from the victim's systems, then deploying ransomware to encrypt files. Victims face two simultaneous threats — paying to restore access and paying to prevent publication of stolen data. The group's leak site publishes victim names and exfiltrated data as leverage.

Data source: This incident record is sourced from public ransomware group leak site disclosures aggregated via the ransomware.live API. Disclosure date reflects when the victim was published on the leak site, which may differ from the initial date of compromise. This platform does not publish or link to stolen data. Last data update: Oct 1, 2026 18:00 UTC.

Frequently Asked Questions

Was FIDUCIAL attacked by ransomware?

Yes. FIDUCIAL was listed as a victim of the Lamashtu ransomware group on September 30, 2026. The organisation is based in France and operates in the Financial Services sector. The disclosure appeared on the group's dark web leak site.

Which ransomware group attacked FIDUCIAL?

FIDUCIAL was attacked by Lamashtu ransomware. Lamashtu is one of the most active ransomware groups, having claimed 44 victims globally. The group typically employs a double-extortion model: encrypting the victim's files and threatening to publish stolen data.

When did the FIDUCIAL ransomware attack occur?

The ransomware attack on FIDUCIAL was disclosed on September 30, 2026. 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 FIDUCIAL ransomware attack?

The specific data stolen from FIDUCIAL 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 Financial Services organisation, FIDUCIAL likely held financial records, client data, and transaction histories.

How can organisations protect against Lamashtu attacks?

To defend against Lamashtu 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.