Malicious Anubis Ransomware Cloudflare Tunnel via cloudflared (via process_creation)
- Product
- windows
- Category
- process_creation
- Author
- HuntRule
- Published
- 2026-09-07
- Updated
- 2026-09-07
ATT&CK techniques
C2Recon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
Exfiltration
Impact
What it detects
This rule detects execution of the cloudflared client establishing an outbound Cloudflare Tunnel. Operators behind the Anubis ransomware campaign dropped cloudflared to Windows and NAS hosts and ran it with tunnel and token arguments to create a persistent encrypted command and control channel that bypasses inbound firewall controls.
Reporting behind it
Detection content is published as a reviewed draft. Tune thresholds and exclusions against your own telemetry before enabling this rule for alerting.
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