Suspicious BeaverTail C2 Download over Non-Standard Port 1224 (via proxy)

ATT&CK techniques

C2

Recon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
- T1105Ingress Tool Transfer
Exfiltration
Impact

What it detects

This rule detects HTTP requests to the BeaverTail command and control endpoint that serves the next stage over TCP port 1224 with a pdown download path. The Lazarus loader retrieves its encoded Python downloader from this fixed port and URI pattern. The combination of the unusual high port and the pdown resource distinguishes this beacon from ordinary web traffic.

Reporting behind it

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Suspicious BeaverTail C2 Download over Non-Standard Port 1224 (via proxy)

Pivot detection · T1105 · 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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