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|Data Sources||Command: Command Execution, File: File Access, Script: Script Execution, Network Traffic: Network Traffic Content|
|Asset||Field Controller/RTU/PLC/IED, Safety Instrumented System/Protection Relay, Control Server|
Adversaries may automate collection of industrial environment information using tools or scripts. This automated collection may leverage native control protocols and tools available in the control systems environment. For example, the OPC protocol may be used to enumerate and gather information. Access to a system or interface with these native protocols may allow collection and enumeration of other attached, communicating servers and devices.
- Using OPC, a component of Backdoor.Oldrea gathers any details about connected devices and sends them back to the C2 for the attackers to analyze.1
- Industroyer automatically collects protocol object data to learn about control devices in the environment.2
- Network Allowlists - Utilize network allowlists to restrict unnecessary connections to network devices (e.g., comm servers, serial to ethernet converters) and services, especially in cases when devices have limits on the number of simultaneous sessions they support.
- Network Segmentation - Prevent unauthorized systems from accessing control servers or field devices containing industrial information, especially services used for common automation protocols (e.g., DNP3, OPC).