Terry P Moosmann CPA PC Listed by The Gentlemen Ransomware Group: Ransomware Claim — What’s Alleged & What To Do
Terry P Moosmann CPA PC was listed by thegentlemen ransomware group on July 16, 2026, in a listing claiming internal files were exfiltrated in a ransomware attack. An undisclosed number of people may be affected; check directly with the firm and monitor accounts for any unusual activity.
Inside the incident
The only confirmed detail is the group’s public listing of the firm. The entry describes the removal of internal files but provides no further technical description of how access was obtained or how long the actors were present in the network. The number of records involved and any timeline of events remain undisclosed.
Who is thegentlemen?
Thegentlemen is a ransomware operation that maintains a leak site to publish the names of organizations it claims to have targeted. Like similar groups, it typically encrypts systems and removes copies of data, then uses the threat of publication to pressure victims. The listing of Terry P Moosmann CPA PC constitutes the group’s claim; no independent confirmation of the incident has been made public.
About Terry P Moosmann CPA PC
The firm operates as a local provider of accounting, tax preparation, and financial services to individuals and small businesses in the Washington, Missouri area. Such practices routinely receive and store client financial statements, tax returns, and related identifying information as part of routine service delivery.
What data was at risk
The listing refers only to “internal files.” The precise categories of information contained in those files have not been disclosed. Organizations of this type commonly hold tax documents, financial records, and personal identifiers, but the exact contents removed in this case remain unconfirmed.
The real-world impact
Individuals and businesses that provided records to the firm face the possibility that copies of their financial and tax information have left the organization’s control. For the firm itself, the incident creates uncertainty around client confidentiality obligations and potential regulatory notification requirements. No specific outcomes or demands have been reported.
If your data was in this claimed breach
Monitor accounts for unusual activity and consider placing a credit freeze or fraud alert with the major credit bureaus. Review any communications sent by the firm for guidance on next steps. 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 thegentlemen — 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.