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Arcus Media

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Description

Arcus Media first emerged in May 2024 and operates as a Ransomware-as-a-Service (RaaS) with a double-extortion model—encrypting data and threatening to leak it if the ransom isn't paid. The group leverages advanced capabilities including selective encryption (partial encryption of large files with the ChaCha20 cipher and RSA‑2048 key protection), privilege escalation, disabling recovery mechanisms, and terminating critical services like SQL servers and email clients to maximize disruption and thwart defense. Initial access comes through phishing, credential theft, or exploitation of vulnerabilities, with lateral movement facilitated by tools like Mimikatz and Cobalt Strike. Since its debut, Arcus Media has — by mid‑2025 — been linked to 50+ confirmed attacks, spanning industries such as business services, retail, media, healthcare, and manufacturing across the Americas, Europe, and Asia. Victims include high-profile targets like Braz Assessoria Contábil and FILSCAP.

External Analysis4
External Analysis
https://halcyon.ai/blog/arcus-media-ransomware-displays-novel-process-targeting-selective-encryption-and-recovery-disruption
https://halcyon.ai/blog/emerging-threat-actor-arcus-media-ransomware
https://securitybuzz.com/cybersecurity-news/arcus-media-the-rising-ransomware-threat-redefining-modern-cybersecurity-defenses/
https://www.watchguard.com/wgrd-security-hub/ransomware-tracker/arcus-media
Jabber2
Jabber
AlexanderPushkin@exploit.im
arcus@xmpp.onion
Mail2
Mail
arcustm@proton.me
arcusteam@proton.me
Tox1
Tox
F6B2E01CFA4D3F2DB75E4EDD07EC28BF793E541A9674C3E6A66E1CDA9D931A1344E321FD2582
Urls1
Url
Status
Screen
Uptime 30d
Health
http://arcuufpr5xxbbkin4mlidt7itmr6znlppk63jbtkeguuhszmc5g7qdyd.onion Up Screen
28%
Activity (interactive) 100
Activity charts
Posts100
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