Analytic 1916

Real-time monitoring identifies the absence of expected command-message delivery confirmation -- a Supervisory Control and Data Acquisition (SCADA)-issued command that does not produce the expected corresponding state-change response within the normal response latency window, while the device remains reachable for other traffic. Documented in the 2015 Ukraine attack, where Sandworm used malicious firmware to render serial-to-Ethernet converters inoperable. OT operational-fidelity gate: Alert only when the action is not attributable to an authorized operator/engineering source for the specific target and function, and it is either outside an approved change/maintenance window or lacks matching change-control context; where telemetry permits, require corroborating device, configuration, or process-state effect. Suppress activity that fully matches approved maintenance, commissioning, failover, recovery, or tested control procedures.

1. Преглед

1.1 Препратки

1.2 Идентифицирани изисквания

1.3 Свързани регулации

2. Идентифицирани изисквания

3. Свързани регулации

Свързани задачи

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