{
  "node_id": "mitre-attack-ics-t0821-modify-controller-tasking",
  "title": "MITRE ATT&CK ICS T0821: Modify Controller Tasking (ICS Tactic TA0104 - Execution)",
  "domain": "Cybersecurity",
  "version": "1.0.0",
  "last_updated": "2026-05-25",
  "bluf": "MITRE ATT&CK T0821 (Modify Controller Tasking) is an ATT&CK for ICS Execution technique. Adversaries may modify the tasking of a controller to allow for the execution of their own programs. This can allow an adversary to manipulate the execution flow and behavior of a controller. According to 61131-3, the association of a Task with a Program Organization Unit (POU) defines a task association. An adversary may modify these associations or create new ones to manipulate the execution flow of a controller. Affected asset classes: None. MITRE-documented mitigations include M0800 Authorization Enforcement, M0804 Human User Authentication, M0947 Audit, M0945 Code Signing. 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
}