Leandri & Associes Listed by qilin Ransomware Group: Ransomware Claim — What’s Alleged & What To Do
Leandri & Associes was listed by the qilin ransomware group on December 09, 2025, with internal files reportedly exfiltrated; the date of the actual intrusion has not been established and the number of people affected remains undisclosed. Individuals should check whether their information was involved and take appropriate protective steps.
Incidents of this kind matter because professional-services firms routinely process documents that contain personal, financial and legal details about clients and employees. Even without Reported Details on the scale or sensitivity of the material, any confirmed exfiltration creates uncertainty for those whose information may now circulate beyond the organisation's control.
What happened
On 9 December 2025, Leandri & Associes appeared on the leak site maintained by the group known as qilin. The entry indicates that internal files were exfiltrated during a ransomware operation. No further information on the date of the intrusion, the volume of data, or the method of initial access has been made public.
Who is qilin?
Qilin is a ransomware operation that has been publicly tracked since at least 2022. The group follows a double-extortion model: it encrypts systems and also removes copies of data, then uses a dedicated leak site to pressure victims by threatening to publish the stolen material. Public reporting has linked the group to intrusions across multiple countries and sectors, with listings typically appearing after ransom negotiations stall or fail.
Who is Leandri & Associes?
Leandri & Associes operates as a professional-services firm, most likely engaged in legal or advisory work. Organisations of this type maintain records that include client identities, case details, correspondence and, in many instances, financial or identification documents. A breach at such a firm is consequential because the material it holds is often subject to professional confidentiality obligations and can affect individuals who are not direct customers of the firm.
The information in question
The only detail released so far is that internal files were taken. The exact categories of data contained in those files have not been disclosed. Firms in this sector commonly store client personal information, contractual records and communications; however, whether any of those specific categories were among the exfiltrated material is unconfirmed.
The real-world impact
Until the contents are clarified, affected individuals face the possibility that documents containing personal or sensitive information could be used for targeted fraud, impersonation or further social-engineering attempts. For the organisation, the incident adds operational disruption from any ransomware activity and potential regulatory or reputational consequences tied to the handling of client data.
What to do if you're exposed
Individuals who believe their information may be involved should monitor their financial accounts and credit reports for unusual activity, enable multi-factor authentication on important services, and consider placing fraud alerts with credit agencies. Readers can also run a free exposure scan of their email address against known breach data to check for prior appearances of their information.
AICompiled with AI assistance from public sources and published under our editorial standards.
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Publicly posted by qilin — unverified claim, pending independent verification
Breach listings — particularly those originating from ransomware or leak sites — are third-party claims that may be unverified, incomplete, or inaccurate. A listing does not by itself confirm that a breach occurred or that any specific data was exposed. Severity is an automated assessment, not a definitive rating. Verification status is shown where available.
Attributions to threat groups and methods reflect public reporting and, in some cases, unverified claims made by the groups themselves; they may be incomplete or later revised. Recent Breaches and GalaxyWarden are independent and are not affiliated with, and do not endorse, any company or group named on this page. This information is aggregated from public sources for awareness only and is not legal, security, or investment advice.