implementing-ot-incident-response-playbook

name	implementing-ot-incident-response-playbook
description	Develop and implement OT-specific incident response playbooks aligned with SANS PICERL framework, IEC 62443, and NIST SP 800-82 that address unique ICS challenges including safety-critical systems, limited downtime tolerance, and coordination between IT SOC, OT engineering, and plant operations teams.
domain	cybersecurity
subdomain	ot-ics-security
tags	["ot-security","ics","incident-response","playbook","sans","iec62443","nist","safety-critical"]
version	1.0
author	mahipal
license	Apache-2.0

Implementing OT Incident Response Playbook

When to Use

• When building OT-specific incident response procedures for the first time
• When existing IT IR playbooks do not address ICS/SCADA-specific requirements
• When preparing for OT ransomware scenarios like EKANS or LockerGoga
• When aligning IR procedures with IEC 62443 and NERC CIP incident reporting requirements
• When conducting post-incident reviews to improve OT IR capabilities

Do not use for IT-only incident response without OT components (use standard NIST 800-61 playbooks), for day-to-day OT security monitoring (see implementing-dragos-platform-for-ot-monitoring), or for tabletop exercise design (see performing-ics-tabletop-exercise).

Prerequisites

• OT asset inventory with criticality ratings and safety system identification
• Defined roles: OT IR Lead, IT SOC Analyst, Plant Operations Manager, Process Safety Engineer
• Communication plan including out-of-band channels (OT incidents may compromise IT communications)
• Known-good backups of PLC programs, HMI configurations, and historian data
• Contact information for ICS vendors, Dragos/Claroty support, and CISA ICS-CERT

Workflow

Step 1: Define OT-Specific Incident Classification and Response Procedures

#!/usr/bin/env python3
"""OT Incident Response Playbook Engine.

Implements structured OT incident response procedures following
SANS PICERL lifecycle with ICS-specific considerations for safety,
availability, and cross-team coordination.
"""

import json
import sys
from datetime import datetime
from enum import Enum
from typing import Dict, List, Optional


class OTIncidentSeverity(Enum):
    SEV1_SAFETY = "SEV1-SAFETY"  # Safety system compromise
    SEV2_PROCESS = "SEV2-PROCESS"  # Active process manipulation
    SEV3_ACCESS = "SEV3-ACCESS"  
    SEV4_RECON =   
    SEV5_IT_SPILLOVER =   


 ():
    RANSOMWARE = 
    MALWARE_ICS = 
    UNAUTHORIZED_ACCESS = 
    PROCESS_MANIPULATION = 
    SIS_COMPROMISE = 
    DATA_EXFILTRATION = 
    SUPPLY_CHAIN = 
    INSIDER_THREAT = 



PICERL_PHASES = {
    : {
        : ,
        : [
            ,
            ,
            ,
            ,
            ,
            ,
        ],
    },
    : {
        : ,
        : [
            ,
            ,
            ,
            ,
            ,
            ,
        ],
    },
    : {
        : ,
        : [
            ,
            ,
            ,
            ,
            ,
            ,
        ],
    },
    : {
        : ,
        : [
            ,
            ,
            ,
            ,
            ,
            ,
        ],
    },
    : {
        : ,
        : [
            ,
            ,
            ,
            ,
            ,
            ,
        ],
    },
    : {
        : ,
        : [
            ,
            ,
            ,
            ,
            ,
            ,
        ],
    },
}


 :
    

     ():
        . = 
        .title = title
        .severity = severity
        .category = category
        .affected_systems = affected_systems
        .created = datetime.now().isoformat()
        .current_phase = 
        .timeline = []
        .decisions = []
        .containment_actions = []

     ():
        
        entry = {
            : datetime.now().isoformat(),
            : phase,
            : action,
            : actor,
            : notes,
        }
        .timeline.append(entry)
         entry

     ():
        
        entry = {
            : datetime.now().isoformat(),
            : decision,
            : rationale,
            : approved_by,
        }
        .decisions.append(entry)
         entry


 :
    

     ():
        .playbooks = ._build_playbooks()

     () -> :
        
         {
            OTIncidentCategory.RANSOMWARE: {
                : ,
                : ,
                : [
                    ,
                    ,
                    ,
                    ,
                    ,
                    ,
                ],
                : [
                    ,
                    ,
                    ,
                    ,
                    ,
                ],
                : [
                    ,
                    ,
                    ,
                    ,
                    ,
                    ,
                ],
                : [
                    ,
                    ,
                    ,
                ],
            },
            OTIncidentCategory.SIS_COMPROMISE: {
                : ,
                : ,
                : [
                    ,
                    ,
                    ,
                    ,
                    ,
                    ,
                ],
                : [
                    ,
                    ,
                    ,
                    ,
                    ,
                ],
                : [
                    ,
                    ,
                    ,
                    ,
                ],
                : [
                    ,
                    ,
                    ,
                ],
            },
        }

     ():
        
        playbook = .playbooks.get(incident.category)
          playbook:
            ()
            

        ()
        ()
        ()
        ()
        ()
        ()
        ()
        ()
        ()
        ()
        ()

        ()
         i, action  (playbook[], ):
            ()

        ()
         i, step  (playbook[], ):
            ()

        ()
         item  playbook[]:
            ()

        ()
         req  playbook[]:
            ()

        
        ()
         phase, info  PICERL_PHASES.items():
            ()
             item  info[][:]:
                ()


 __name__ == :
    engine = OTPlaybookEngine()

    
    incident = OTIncident(
        title=,
        severity=OTIncidentSeverity.SEV2_PROCESS,
        category=OTIncidentCategory.RANSOMWARE,
        affected_systems=[, , , ],
    )

    engine.execute_playbook(incident)