The Landreau Group Listed by sinobi Ransomware Group: Ransomware Claim — What’s Alleged & What To Do
The Landreau Group was listed by the sinobi ransomware group on December 07, 2025, after internal files were exfiltrated in a ransomware attack; the date of the intrusion has not been established. Individuals connected to the organisation should check whether their information was exposed and take appropriate protective steps.
What happened
The incident came to light through a listing posted by the sinobi group on December 7, 2025. The group claims that internal files were taken from The Landreau Group during a ransomware operation. No information has been released on the date of the intrusion itself, the volume of data involved, or whether any systems were encrypted. The number of people whose information may be affected remains unknown.
Inside sinobi
Sinobi is a ransomware group that has been publicly tracked for several years. It typically gains access to corporate networks, exfiltrates data, and then lists victim organizations on its leak site when ransom demands are not met. The group’s listings function as claims of possession rather than independently verified disclosures. Its operations follow patterns seen in other ransomware campaigns, including selective targeting of mid-sized organizations that hold sensitive records.
About The Landreau Group
The Landreau Group is an independent insurance agency founded in 2003 by Carlos Landreau. It operates in the Minneapolis/St. Paul region and focuses on tailored coverage for clients with complex commercial and personal insurance needs. Organizations in this sector routinely collect and store policy applications, claims histories, financial details, and identifying information belonging to individuals and businesses.
The information in question
The only detail released is that internal files were allegedly exfiltrated. The precise categories of data contained in those files have not been disclosed. Insurance agencies of this type commonly hold client names, addresses, dates of birth, policy numbers, claims records, and payment information, but it is not confirmed whether any of these elements were among the files taken.
Why it matters
Insurance records can contain detailed personal and financial information that retains value over time. When such data is removed from an organization’s control, affected individuals face the possibility of identity misuse or targeted fraud. For the agency, the incident adds operational and regulatory burdens even if the full extent of exposure is still unclear.
If your data was in this claimed breach
Individuals who are clients of The Landreau Group or similar agencies can take several immediate steps to limit potential harm. These include reviewing account statements for unusual activity, placing fraud alerts with credit bureaus, and using unique passwords for insurance-related portals.
- Monitor bank and credit accounts for unauthorized transactions.
- Request a free credit report from each of the three major bureaus.
- Enable multi-factor authentication on any accounts linked to the agency.
- Run a free exposure scan of your email address against known breach datasets.
AICompiled with AI assistance from public sources and published under our editorial standards.
How this breach connects
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Publicly posted by sinobi — 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.