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UnclassifiedIdeology

ZeffSec

ZeffSec is a threat actor group with an ideological motive, tracked by Brandefense.

Also known as
  • Zeff Security
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Techniques
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Exploited CVEs
No CVE data
Record updated

About ZeffSec.

ZeffSec is a hacktivist collective focused on infrastructure-level disruption and exposing vulnerabilities in centralized digital networks. In March 2026, the group claimed responsibility for a large-scale DDoS attack against ArvanCloud, Iran's primary cloud and CDN provider, causing widespread service outages across platforms including the online education service Skyroom. The group announced the operation via Telegram, stating their goal was disruption of centralized infrastructure rather than data theft.

Last updated Oct 9, 2026. Compiled by Brandefense technologies from structured threat intelligence and reviewed by Brandefense analysts. Techniques follow the MITRE ATT&CK framework.