TAG-144 Dynamic DNS C2 Resolution via Structured DuckDNS Subdomain (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
- T1071.001Web Protocols
Exfiltration
Impact

What it detects

This rule detects DNS resolution of TAG-144 command-and-control hosts using the campaign envio dynamic-DNS naming scheme on duckdns.org, matching the structured envio prefix with a short numeric suffix. Adversaries leverage dynamic DNS to rotate resilient C2 endpoints, making the specific subdomain pattern a useful command-and-control indicator.

Reporting behind it

Related detections9 linkedT1071.001 — drag to rearrange

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TAG-144 Dynamic DNS C2 Resolution via Structured DuckDNS Subdomain (via dns_query)

Pivot detection · T1071.001 · 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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