Le Perreux sur Marne Ransomware Claim by thegentlemen (May 2026)

Claim Summary

On May 24, 2026, the ransomware group “thegentlemen” allegedly added the French municipality of Le Perreux sur Marne to their leak site. The group claims to have compromised the official municipal portal, leperreux94.fr, which serves as a central hub for residents to access e-services including ID appointment booking, local event calendars, transport schedules, and social programs. The claimed data volume remains undisclosed, and no samples or proof of access have been published at this time. This report is based solely on the group’s unverified leak site posting and has not been independently confirmed by Yazoul Security.

Threat Actor Profile

thegentlemen is a relatively obscure ransomware group with limited public track record. Their total known victim count is unknown, and no public research or attribution studies are currently available. Based on observed tooling, the group appears to employ a sophisticated technical arsenal, including:

• DumpBrowserSecrets: For extracting stored credentials from browsers
• Hydra: A network login cracker used for brute-force attacks
• KslDump: A memory dump tool for credential harvesting
• EDRStartupHinder: A tool designed to impede endpoint detection and response systems
• GFreeze: Likely a process or service freezing utility
• GLinker: Possibly a lateral movement or persistence tool
• ADFind: Active Directory reconnaissance utility
• BloodHound: For mapping Active Directory attack paths

These tools suggest thegentlemen prioritizes credential theft, lateral movement, and evasion of security controls. However, without confirmed victims or public research, their operational credibility remains unproven. Ransomware groups with limited track records often exaggerate claims to build reputation.

Alleged Data Exposure

According to the leak site, thegentlemen claims to have accessed data from leperreux94.fr, the official municipal portal of Le Perreux sur Marne, a Parisian suburb. The portal allegedly provides residents with e-services such as ID appointment booking, local event calendars, transport schedules, and social programs. The group has not specified the type or volume of data exfiltrated. Potential data categories could include:

• Resident appointment records and personal identification details
• Local government administrative data
• Community program enrollment information
• Internal communications or system configurations

No data samples, screenshots, or download links have been provided to substantiate the claim. This lack of evidence is consistent with groups seeking to pressure victims before proving compromise.

Potential Impact

If verified, this incident could have several consequences for Le Perreux sur Marne and its residents:

• Service Disruption: The municipal portal may be taken offline, disrupting access to essential e-services like ID appointments and transport schedules.
• Data Privacy Risks: Residents’ personal information used for appointments or social programs could be exposed, leading to identity theft or phishing attacks.
• Reputational Damage: Trust in local government digital services may erode, particularly if sensitive administrative data is leaked.
• Regulatory Scrutiny: As a French public entity, Le Perreux sur Marne may face obligations under GDPR and French data protection laws if personal data is confirmed compromised.

The group’s use of tools like ADFind and BloodHound suggests they may have mapped the municipality’s Active Directory environment, potentially enabling broader network compromise.

What to Watch For

• Leak Site Updates: Monitor thegentlemen’s leak site for any published data samples or download links, which would increase the credibility of the claim.
• Official Statements: Watch for communications from Le Perreux sur Marne or French cybersecurity authorities (ANSSI) regarding the incident.
• Phishing Campaigns: If resident data is exposed, expect targeted phishing emails impersonating municipal services.
• YARA Rules: At present, no public YARA rules exist for thegentlemen’s tools. Security teams should monitor for detections related to the listed tools (e.g., DumpBrowserSecrets, Hydra, BloodHound activity) and consider custom rules for EDRStartupHinder and GFreeze based on behavioral indicators.

Disclaimer

This report is based on unverified claims made by the ransomware group “thegentlemen” on their leak site. Yazoul Security has not independently confirmed the compromise of Le Perreux sur Marne’s systems or the exfiltration of any data. Ransomware groups frequently exaggerate or fabricate claims to pressure victims into payment. All information should be treated as preliminary and subject to verification. No PII, download links, data samples, credentials, or .onion URLs are included in this report. Organizations are advised to follow official channels for updates.