{
  "node_id": "mitre-attack-ics-t0803-block-command-message",
  "title": "MITRE ATT&CK ICS T0803: Block Command Message (ICS Tactic TA0107 - Inhibit Response Function)",
  "domain": "Cybersecurity",
  "version": "1.0.0",
  "last_updated": "2026-05-25",
  "bluf": "MITRE ATT&CK T0803 (Block Command Message) is an ATT&CK for ICS Inhibit Response Function technique. Adversaries may block a command message from reaching its intended target to prevent command execution. In OT networks, command messages are sent to provide instructions to control system devices. A blocked command message can inhibit response functions from correcting a disruption or unsafe condition. Affected asset classes: None. MITRE-documented mitigations include M0810 Out-of-Band Communications Channel, M0807 Network Allowlists, M0814 Static Network Configuration. Operational-technology controls map to NIST SP 800-82 Rev 3 and the IEC/ISA 62443 series.",
  "paywall": {
    "status": "LOCKED",
    "unlock_cost_usd": "0.01",
    "skyfire_id": "41779894-ece2-4163-9761-b3b1b76e19b0"
  },
  "crosswalks": {
    "_available_keys": [
      "nist_framework",
      "iso_standard",
      "industry_mapping",
      "mitre_d3fend"
    ],
    "_note": "Full crosswalk values included in vault response"
  },
  "dependencies": [
    "nist-cybersecurity-framework-2-0",
    "iso-27001-2022",
    "nist-sp-800-53-r5",
    "cis-controls-v8",
    "mitre-attack-framework-v14"
  ],
  "primary_citations_count": 7
}