Chiarottino Listed by insomnia Ransomware Group: Ransomware Claim — What’s Alleged & What To Do
Chiarottino appeared on a list published by the insomnia ransomware group on January 23, 2026, with internal files reported to have been exfiltrated. Individuals are advised to check whether their information was exposed and to follow any guidance issued by the organisation.
Ransomware groups continue to target professional services firms as part of a broader pattern of attacks on organisations that hold concentrated volumes of sensitive client and corporate information. On 23 January 2026 the name Chiarottino appeared on a listing associated with the group known as insomnia, with the entry describing internal files taken during a ransomware operation. The number of individuals affected remains unknown and no further technical details have been released by either the firm or the group.
What happened
The only confirmed information is that Chiarottino was listed by the insomnia group on 23 January 2026. The listing states that internal files were exfiltrated during a ransomware attack. No date of the intrusion, volume of data, or method of initial access has been disclosed. The firm has not issued a public statement confirming or denying the claims.
The group behind it: insomnia
Insomnia is a ransomware operation that follows the now-common double-extortion model: data are copied before encryption, and the group then lists victim names on a public site to pressure payment. Such groups typically gain initial access through phishing, compromised remote-access services or supply-chain weaknesses, then move laterally to locate and exfiltrate documents before deploying encryption. The listing of Chiarottino constitutes a claim by the group; independent confirmation of the data theft has not been reported.
Chiarottino and its sector
Chiarottino, also styled Chiarottino and Nicoletti Advogados, is a Brazilian full-service law firm whose practice areas include corporate law, environment, arbitration, finance, compliance, litigation, contracts, digital matters, family law, real estate, capital markets, intellectual property, labour, tax and wealth management. Law firms routinely store contracts, due-diligence materials, regulatory filings, correspondence with clients and counterparties, and personal data belonging to individuals and companies. A breach at such an organisation therefore carries implications that extend beyond the firm itself to its clients and their counterparties.
The information in question
The listing refers only to “internal files exfiltrated in ransomware attack.” No inventory of specific document types, client names or data categories has been published. Organisations of this kind typically hold client identities, financial details, privileged legal communications and regulatory submissions, yet the precise contents of any exfiltrated material remain unconfirmed.
The real-world impact
Exposure of internal legal files can affect the confidentiality of ongoing matters, the privacy of individuals named in those files and the commercial interests of corporate clients. For the firm, the incident may trigger regulatory notification obligations, client inquiries and potential reputational consequences. Because the scale of the data and the identities of any affected individuals are not known, the extent of downstream harm cannot yet be quantified.
Were you affected?
Individuals or organisations concerned about possible exposure should first contact Chiarottino directly for information on any notifications the firm may issue. In the absence of Reported Details, practical steps include monitoring official communications from the firm and reviewing account activity for any signs of misuse. Readers may also run a free exposure scan of their email address against known breach data to check whether their information has appeared in previously published datasets.
- Monitor statements issued by Chiarottino.
- Review personal and corporate accounts for unusual activity.
- Run a free exposure scan of your email address.
AICompiled with AI assistance from public sources and published under our editorial standards.
How this breach connects
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Publicly posted by insomnia — 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.