Malicious Project CAV3RN DNS Configuration Recovery via cloudlanecdn.com (via dns_query)

PremiumReviewedSigma · High · v1
Category
dns_query
Author
HuntRule
Published
2026-07-02
Updated
2026-08-28

ATT&CK techniques

C2
  1. Recon

  2. Resource Dev

  3. Initial Access

  4. Execution

  5. Persistence

  6. Priv Esc

  7. Defense Evasion

  8. Cred Access

  9. Discovery

  10. Lateral Movement

  11. Collection

  12. Exfiltration

  13. Impact

What it detects

This rule detects DNS queries to encoded subdomains of cloudlanecdn.com, a channel used by the Project CAV3RN espionage framework to recover configuration data from DNS AAAA records. The encoded label structure and attacker-controlled domain indicate covert command-and-control and data-encoding activity that should not appear in normal traffic.

Related detections9 linkedT1071.004 — drag to rearrange
Suspicious Long Alphanumeric DNS Subdomain Indicative of DNS Tunneling
Suspicious DNS Tunneling With Hex Subdomain To info Domain (via dns_query)
Windows Execution of dnscat2 and iodine DNS Exfiltration/Tunneling Tools
DoT (DNS Over TLS) Activation - Command (via process_creation)
DoT (DNS Over TLS) Activation - PowerShell (via powershell)
Possible C2 Beacon with Fixed Authorization URI Parameter via proxy
Suspicious FinCounter DNS Tunneling Query via dns_query
Malicious SUNBURST Command and Control DNS Query to avsvmcloud Domain (via dns_query)
Suspicious Exploitation Callback to Dnslog Service (via dns_query)
Malicious Project CAV3RN DNS Configuration Recovery via cloudlanecdn.com (via dns_query)
Pivot detection · T1071.004 · 9 related

Detection content is published as a reviewed draft. Tune thresholds and exclusions against your own telemetry before enabling this rule for alerting.