Conasa Infraestrutura S.A. falls victim to Cicada3301 Ransomware

About Conasa Infraestrutura S.A.:
Conasa is a Brazilian infrastructure services company specializing in construction and maintenance of power transmission lines, substations, and utilities across Brazil, supporting public and private sector clients.

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📌 Overview
On July 14, 2025, the ransomware group Cicada3301 claimed responsibility for an attack on Conasa Infraestrutura S.A., a major Brazilian utilities infrastructure company. The actor alleges to have exfiltrated 260 GB of internal data. The claim was made on their Tor-based leak site, and screenshots were shared as a demonstration of the breach.

📊 Key Details