Suspicious Outbound Connection to InvisibleFerret C2 Ports 1224 and 1245

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 outbound TCP connections to the uncommon ports 1224 and 1245 used by the InvisibleFerret and BeaverTail command and control servers in the North Korean job-hunter campaigns per Unit 42. These fixed high ports carry the actor heartbeat and tasking traffic which is rare for legitimate applications and flags an infected host.

Reporting behind it

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Suspicious Outbound Connection to InvisibleFerret C2 Ports 1224 and 1245

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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