A ransomware group calling itself Storm claims to have carried out an attack against The Cecilian Bank, according to a listing on the group’s own leak site dated August 22, 2026. This claim was tracked by ransomware.live, a security research platform that monitors ransomware groups’ public leak sites. It is important to stress that this is an unverified claim made by a criminal group seeking publicity and leverage — it is not a confirmed fact. The Cecilian Bank has not issued any public statement confirming a breach, and no regulator has confirmed the claim either.
What we know — and don’t
- A group identifying itself as Storm posted a claim referencing The Cecilian Bank on its leak site, dated August 22, 2026.
- The Cecilian Bank operates in the finance sector.
- The specific types of data the group claims to have obtained have not been disclosed or confirmed by any party.
- There is no independent confirmation from The Cecilian Bank, a regulator, or any other authoritative source that an intrusion actually occurred.
- Claims made on ransomware leak sites are sometimes exaggerated, fabricated, or recycled from older incidents, so this listing alone should not be treated as proof of a breach.
What should you do if you have an account with this company?
- Change your password for your account with The Cecilian Bank, and avoid reusing that password anywhere else.
- Enable two-factor authentication (2FA) on your account if it is available and not already active.
- Watch closely for phishing emails, texts, or phone calls that pretend to be from the bank, especially messages urging urgent action or asking for login details.
- Review recent account statements and transaction history for anything unfamiliar, and report suspicious activity to the bank directly.
- Consider signing up for an identity monitoring service like a service like Aura or LifeLock to get alerted if your personal information turns up in places it shouldn’t.
- Avoid clicking links in unsolicited messages referencing this claim; instead, go directly to the bank’s official website or app.
BreachLetter will update this page if The Cecilian Bank confirms this incident, if new details emerge, or if the matter is officially reported to regulators.