On March 17, 2026, Amerinational Management Services appeared on the leak site of the sinobi ransomware group, with the attackers claiming to have exfiltrated internal files from the company that provides business software and payment services to martial arts schools across the United States.
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Reported Details of the Incident
Public reporting indicates that sinobi listed AMS on its dark-web leak page and stated that internal files had been taken during a ransomware incident. The exact number of people whose information may have been exposed remains unknown. Available reporting describes the exposed material as internal files rather than a structured database of customer records. AMS provides ATLAS Martial Arts Software, tuition management, merchant accounts, lead-generation websites, and after-school program tools to martial arts school owners. Because these systems handle billing, student enrollment, and payment data, any leaked files could contain names, addresses, phone numbers, email addresses, and financial details belonging to school owners, instructors, and the families they serve.
Why This Matters for You and Your Family
If you or your children train at a martial arts school that uses AMS software or payment services, your personal information may now be in attackers’ hands. Names, addresses, phone numbers, and payment records are exactly the building blocks criminals need to open accounts in your name, file fraudulent tax returns, or sell your details on underground markets. Even if you never directly signed up with AMS, the schools you pay each month often store your family’s contact information and children’s dates of birth inside the ATLAS platform. Once that data leaves the company’s control, it can surface months or years later in unexpected ways.
The Doxxing and Identity-Chain Risks
A single breach like this rarely stays isolated. Attackers frequently combine the newly obtained files with information already circulating from earlier leaks. An email address tied to your child’s martial arts registration can be linked to a gaming username, a parent’s social-media handle, or a reused password. These connections create an identity chain that lets criminals move from one account to another, turning a tuition record into full doxxing or account takeovers. Credential leaks of this nature regularly cascade into gaming account compromises because children often reuse the same email or password across school portals and popular game platforms.