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Cyclops Blink Malware Targeting WatchGuard Firewalls

ID: f8f2fc95-4030-57dd-b07f-05255f7795ee

STIX ID: report--f8f2fc95-4030-57dd-b07f-05255f7795ee

Feed Name: Kudelski Security

Threat Score
88/100

Date Published: 2022-05-04

Date Updated: 2026-07-22

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The advisory describes Cyclops Blink, a modular firmware-based implant linked to the Sandworm/Voodoo Bear APT that targets WatchGuard Firebox SOHO devices by abusing the firmware upgrade/HMAC process to achieve persistent, botnet-style control; it provides technical details, observed capabilities (C2, file collection, command execution, packet sniffing), scope (~1,500+ impacted IPs, ~40% in the US), detection guidance, IOCs, and remediation/upgrade recommendations.

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