A ransomware group calling itself SilentRansomGroup claims to have targeted the international law firm Mayer Brown, with a listing dated August 7, 2026 appearing on the group’s dark web leak site. This claim comes from the group’s own leak-site posting, which was tracked and cataloged by ransomware.live, a security research platform that monitors ransomware groups’ public claims. At this time, the claim has not been independently verified, and Mayer Brown has not issued any public confirmation of an incident. It is important to understand that entries on ransomware leak sites are self-reported statements made by criminal actors seeking leverage, and they are not evidence that an intrusion actually occurred as described.
What we know — and don’t
- SilentRansomGroup posted a claim referencing Mayer Brown on its leak site, with a claimed date of August 7, 2026.
- Mayer Brown operates in the legal sector, providing legal services to corporate and institutional clients.
- The specific types of data the group claims to have obtained have not been disclosed in the listing and have not been confirmed by any independent source.
- No regulator filing or public statement from Mayer Brown confirming this incident is currently known to exist.
- As with all leak-site postings, the claim should be treated as unverified until the company or an official body provides confirmation.
What should you do if you have an account with this company?
- Change your password for any account associated with Mayer Brown, and avoid reusing that password on other sites.
- Enable two-factor authentication (2FA) wherever it is offered, for both work-related and personal accounts.
- Be alert to phishing emails or unexpected calls referencing this claim, especially messages that ask you to click links or share credentials.
- Monitor financial and email accounts for unusual activity in the weeks following any reported incident.
- Consider signing up for an identity monitoring service like a service like Aura or LifeLock to get alerted if your personal information appears in places it shouldn’t.
- Keep records of any suspicious communications in case they are needed later for reporting purposes.
BreachLetter will update this page if Mayer Brown confirms the incident, if new details emerge from credible sources, or if the matter is officially reported to regulators.