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Cyber Threat
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Ransomware victim Business Services

Groupe Sécurité CLB

Listed by Ailock on · organisation based in France

securiteclb.com

Disclosed
Jun 4, 2026
Leak-site listing date
Threat group
Ailock
51 victims listed
Country
France
#6 most targeted
Sector
Business Services

ThreatAI analysis

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

About the Ailock group

AiLock is a ransomware operation that emerged in early 2025, marketing itself as AI-assisted ransomware using a hybrid ChaCha20/NTRUEncrypt encryption scheme and double-extortion tactics, actively recruiting affiliates and threatening regulatory reporting if ransoms are unpaid. Ailock has listed 51 victims since April 2015.

Incident analysis

Groupe Sécurité CLB was listed by Ailock ransomware, a group with 51 victims recorded in this database. The listing appeared on the group's leak site on June 4, 2026.

Groupe Sécurité CLB is based in France and operates in the Business Services sector. France ranks #6 worldwide for ransomware disclosures, with 568 victims in this database.

Sector context. Business services firms often have access to multiple client environments, making them high-value pivot points for ransomware operators seeking to maximise impact across multiple victim organisations.

Ailock 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files are encrypted, so the victim faces two demands at once — pay to restore access, and pay to keep stolen data unpublished.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 Groupe Sécurité CLB attacked by ransomware?

Yes. Groupe Sécurité CLB was listed as a victim of the Ailock ransomware group on June 4, 2026. The organisation is based in France and operates in the Business Services sector. The disclosure appeared on the group's dark web leak site.

Which ransomware group attacked Groupe Sécurité CLB?

Groupe Sécurité CLB was attacked by Ailock ransomware. Ailock is one of the most active ransomware groups, having claimed 51 victims globally. The group typically employs a double-extortion model: encrypting the victim's files and threatening to publish stolen data.

When did the Groupe Sécurité CLB ransomware attack occur?

The ransomware attack on Groupe Sécurité CLB was disclosed on June 4, 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 Groupe Sécurité CLB ransomware attack?

The specific data stolen from Groupe Sécurité CLB 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 Business Services organisation, Groupe Sécurité CLB likely held sensitive business data, client information, and operational records.

How can organisations protect against Ailock attacks?

To defend against Ailock 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.