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Nefilim Ransomware Publishes Arteris SA Data Leak

ID: b78d94ef-641e-55a6-a7a7-4e9ceca5fd8b

STIX ID: report--b78d94ef-641e-55a6-a7a7-4e9ceca5fd8b

Feed Name: Cyble Blog

Threat Score
70/100

Date Published: 2025-05-09

Date Updated: 2026-07-16

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The Cyble report details an active ransomware extortion campaign by the Nefilim operators targeting Arteris S.A., a major Brazilian highway concession company. Multiple data dumps (reported at ~7–12 GB per release) were published across April–June 2020 after the company allegedly refused ransom demands, exposing confidential corporate documents and investor materials.

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