Graymatter Listed by sinobi Ransomware Group: Ransomware Claim — What’s Alleged & What To Do
Graymatter was listed by the sinobi ransomware group on February 20, 2026, after internal files were exfiltrated in a ransomware attack. An undisclosed number of people may have been affected; anyone who has shared data with the organisation should review their accounts and monitor for suspicious activity.
Breaking down the breach
The only Reported Details are the date of the listing and the statement that internal files were taken. No information has been released on the volume of data, the timeline of the intrusion, or whether encryption occurred alongside the exfiltration. Graymatter has not issued a public statement confirming or disputing the listing.
The group behind it: sinobi
Sinobi is a ransomware actor that maintains a leak site where it posts names of organizations it claims to have targeted. The group’s listings serve as its primary method of publicizing incidents. In this case, the listing of Graymatter constitutes the group’s claim of responsibility; independent confirmation of the underlying access has not been provided in available reporting.
Graymatter and its sector
Graymatter is an Indian information-technology company founded in 2006 and headquartered in Bangalore. It develops analytics, artificial-intelligence, and business-intelligence platforms focused on the airport, retail, and manufacturing industries. Its products, including Skateboard and StoreSense, process operational data to generate insights on passenger movement, retail performance, and facility management.
Organizations in these sectors routinely collect and analyze location, transaction, and operational records. A compromise at a firm supplying such tools can therefore touch data flows that extend beyond the company itself into client environments.
What was likely exposed
The listing states that internal files were exfiltrated. No further breakdown of file categories or data fields has been published. Companies of this type commonly store client project data, analytics models, internal communications, and administrative records; however, the exact composition of the exfiltrated material is unconfirmed.
Why it matters
Exposure of internal files can reveal proprietary methods, client configurations, or operational procedures. For organizations in aviation, retail, and manufacturing, such disclosures may affect competitive information or downstream systems that rely on the compromised analytics tools. Individuals whose data passed through those systems face the standard risks associated with any leakage of operational records, though the scale of any personal data involved is not yet known.
Were you affected?
Individuals can review any direct notifications issued by Graymatter or its clients. Monitoring financial and email accounts for unusual activity remains a standard precaution. Readers may also run a free exposure scan of their email address against known breach data sets to determine whether their information appears in previously published collections.
AICompiled with AI assistance from public sources and published under our editorial standards.
How this breach connects
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Publicly posted by sinobi — 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.