Zumarius

Zumarius is a Brazil-linked cyber persona tracked in 3C-INT as a member of Ghostteam. The strongest recent public footprint consists of hack-and-leak claims involving Brazilian and Paraguayan public-sector data, including a September 2026 claim involving Brazil's electoral-court ecosystem and a separate alleged 10.5 GB Ministry of Health dataset from Paraguay.

Current evidence supports treating Zumarius as an active data-breach / leak persona whose claims emphasize unauthorized administrative access, database acquisition and public release. The September 2026 Paraguayan health claim was explicitly reported as unconfirmed, and the Brazilian electoral-court claim likewise remains dependent on actor/monitoring-source assertions rather than victim confirmation.

INFERENCE (confidence: medium): the persona appears to derive credibility primarily from possession or claimed possession of institutional datasets rather than from publicized malware development, DDoS infrastructure or ransomware operations.