Analytic 2122

Real-time monitoring identifies Secure Shell (SSH) or local authentication by an Industrial Control System (ICS) service or operator account from a source Internet Protocol (IP) address outside the approved administrative Classless Inter-Domain Routing (CIDR) subnet, or a sudo/su escalation event by an ICS service account that does not normally require interactive privilege escalation, correlated with subsequent execution of ICS engineering tools. OT operational-fidelity gate: Alert only when the account/device/session violates the approved identity + source host/jump path/zone policy and is corroborated by access to a protected OT asset, execution, configuration change, or another security-relevant follow-on event. Suppress approved shift activity, vendor support, break-glass use, commissioning, and documented remote-access windows.

1. Przegląd

1.1 Odwołania

1.2 Zidentyfikowane wymagania

1.3 Powiązane regulacje

2. Zidentyfikowane wymagania

3. Powiązane regulacje

Powiązane zgłoszenia

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