Suspicious Cloudflare Quick Tunnel Used for Covert Access (via dns_query)

ATT&CK techniques

C2

Recon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
- T1090Proxy
Exfiltration
Impact

What it detects

This rule detects DNS resolution of trycloudflare.com quick tunnel subdomains used in the TeamPCP supply chain attack to expose internal services and route command and control through Cloudflare infrastructure. Ephemeral tunnel domains provide attacker-controlled ingress that bypasses perimeter controls, so such lookups from servers warrant investigation.

Reporting behind it

Related detections9 linkedT1090 — drag to rearrange

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Suspicious Cloudflare Quick Tunnel Used for Covert Access (via dns_query)

Pivot detection · T1090 · 9 related

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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