Network Connection Enumeration
Where this stands
No Sigma rule can address this — the telemetry MITRE names has no Sigma logsource behind it.
Sigma has no logsource taxonomy for ICS. MITRE's telemetry here is operational historians and controller state, which no Sigma rule can address.
What the technique is
Adversaries may perform network connection enumeration to discover information about device communication patterns. If an adversary can inspect the state of a network connection with tools, such as Netstat, in conjunction with System Firmware, then they can determine the role of certain devices on the network. The adversary can also use Network Sniffing to watch network traffic for details about the source, destination, protocol, and content.
Read it on attack.mitre.orgWhat MITRE says you would watch
- AN1902
Monitor executed commands and arguments that may look for details about the network configuration and settings, such as IP and/or MAC addresses, of systems they access or through information discovery of remote systems. Also monitor executed commands and arguments that may attempt to get a listing of network connections to or from the compromised system they are currently accessing or from remote systems by querying for information over the network. Information may also be acquired through Windows system management tools such as Windows Management Instrumentation and PowerShell. […]
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