TRITON: Safety System Sabotage at a Petrochemical Plant

A nation-state-grade ICS intrusion that reaches the deepest protective layer of a petrochemical plant. An attacker reuses remote access to pivot from the DCS network onto a dual-homed Schneider Triconex SIS engineering workstation, transfers the TRITON attack framework (an executable masquerading as the legitimate Triconex Trilog viewer plus a bundled library and two controller payloads), and uses the proprietary TriStation protocol to reprogram a safety controller, until a failed validation check trips an unplanned emergency shutdown. Reconstruct the kill chain from SIEM, endpoint XDR, and firewall telemetry, and classify the ICS impact techniques.