On May 5, 2026, the Italian accounting firm Studio Marchi - Studio Professionale Associato appeared on the leak site of the Everest ransomware group. Internal files were allegedly exfiltrated during a ransomware attack, and the firm’s client data is now at risk of public release.
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What Public Reporting Shows
Public reporting indicates the firm’s internal documents were stolen and uploaded to the Everest ransomware leak portal. The exact number of people whose information may have been exposed remains unknown, but accounting and professional services firms typically hold tax records, financial statements, Social Security numbers or equivalent national identifiers, bank details, addresses, and correspondence for individuals and families. No official statement from the firm has clarified the volume or exact categories of data taken. The listing appeared on the group’s .onion site, which serves as both a shaming platform and a countdown clock for victims who do not pay.
Why This Matters for You and Your Family
When an accounting firm is breached, the information stolen is rarely limited to corporate ledgers. Tax returns, bank account numbers, and personal identification documents belonging to everyday clients can surface. If your accountant or tax preparer uses Studio Marchi, your family’s financial history, home address, and contact details may now sit inside files controlled by extortionists. Once that data leaves the controlled environment, it travels quickly through underground markets and can be combined with other leaks to build a complete profile of your household.
Credential leaks from related systems often follow these incidents. The same email address and password used to log into your accountant’s client portal may also protect your email, retirement accounts, or children’s gaming logins. A single exposed record can therefore open multiple doors.