grupopuma Listed by nova Ransomware Group: Ransomware Claim — What’s Alleged & What To Do

On December 9, 2025, the ransomware group nova listed grupopuma on its leak site and claimed responsibility for a ransomware attack that included the exfiltration of internal files. The number of individuals whose information may be involved remains unknown, and no confirmation of the claim or details on the volume of data has been made public. The incident is significant because grupopuma operates in the construction sector across multiple continents and works with both public and private clients. Any exposure of internal records from such an organization can affect project documentation, partner communications, and operational systems used in infrastructure work.

Inside the incident

The only confirmed public information is the listing itself on December 9, 2025. Nova claims to have exfiltrated internal files during a ransomware operation. The group’s accompanying statement refers to local folders, program credentials, databases, and additional material, but provides no further verified details. The scale of the intrusion, the method of initial access, and whether encryption was also deployed are not disclosed in available reporting.

Who is nova?

Nova is a ransomware group that follows a double-extortion model. It typically exfiltrates data from targeted networks and then threatens to publish the material on a dedicated leak site unless a ransom is paid. The group has claimed victims across multiple industries and maintains a public platform to list organizations it says it has compromised. Its listings constitute claims by the group rather than independently verified incidents.

About grupopuma

Grupo Puma is a construction-industry company that supplies products and services for building projects. It operates in multiple countries and serves both government and commercial clients. Organizations in this sector routinely maintain records related to contracts, engineering specifications, supplier relationships, employee information, and financial transactions across dispersed project sites.

What was likely exposed

The listing states that internal files were exfiltrated. No inventory of specific data categories or record counts has been released. Companies of this type commonly store project files, client and vendor contact details, employee records, and system credentials. The precise contents of any exfiltrated material remain unconfirmed.

Why it matters

Construction firms hold documentation that can reveal operational dependencies, pricing structures, and access points to physical sites or partner systems. If credentials or internal databases are among the material, the exposure could facilitate further unauthorized access or targeted follow-on activity. For individuals whose details appear in project or personnel records, the main risks are misuse of contact information or attempts to leverage the data in subsequent phishing or fraud schemes.

If your data was in this claimed breach

Monitor accounts associated with the organization for unusual activity and change passwords for any services where the same credentials may have been reused. Enable multi-factor authentication on important accounts. Individuals can also run a free exposure scan of their email address against known breach data to check for appearances in previously published datasets.

AICompiled with AI assistance from public sources and published under our editorial standards.