Suspicious Internet Scanning for Docker and Kubelet Ports via masscan

ATT&CK techniques

Discovery

Recon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
- T1046Network Service Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects the masscan tool being run against the Docker API and kubelet ports which threat actors use to discover exposed container orchestration services across the internet before deploying cryptomining payloads.

Reporting behind it

Related detections9 linkedT1046 — drag to rearrange

Malicious NetExec SMB Enumeration Execution (via process_creation)

Possible Out-Of-Band Interaction via requestrepo via DNS (via dns_query)

Possible Interactsh Out-Of-Band Interaction via DNS (via dns_query)

Suspicious Advanced IP Scanner Execution for Network Discovery

Suspicious masscan Scanning Docker API Port 2375

Suspicious Network Reconnaissance via Advanced Port Scanner

Suspicious Nmap Scanner Probe URIs in HTTP Requests (via webserver)

Suspicious Fscan Internal Network Scanner Execution (via process_creation)

Possible Network Service Scanning via Nmap or Masscan (via process_creation)

Suspicious Internet Scanning for Docker and Kubelet Ports via masscan

Pivot detection · T1046 · 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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