Sherlocked Security – Operational Technology (OT) Resilience
Resilience Isn’t Just IT Anymore – Protect What Keeps You Running.
📄 1. Statement of Work (SOW)
Service Name: Operational Technology Resilience Assessment & Strategy
Client Type: Manufacturing Plants, Energy Providers, Utilities, Transportation, Industrial IoT Networks
Service Model: OT Asset Mapping + Threat Simulation + Recovery Strategy + Segmentation Review
Compliance Coverage: NIST SP 800-82, IEC 62443, ISA/IEC 61511, CISA Guidelines
Assessment Types:
- OT Asset Inventory and Dependency Mapping
- Network Segmentation & Firewall Review
- Industrial Protocol Security Review (Modbus, DNP3, BACnet)
- ICS/SCADA Incident Response Readiness
- Recovery & Redundancy Validation
- Business & Safety Continuity Gap Analysis
- Human-Machine Interface (HMI) and PLC Hardening
🧠 2. Our Approach (with Visual)
⚙️ Detect. Isolate. Harden. Recover.
[Asset & Flow Mapping] → [Vulnerability & Exposure Analysis] → [Network Segmentation Validation] → [Threat Simulation] → [Resilience Gap Discovery] → [Fixes & Recovery Plan]
🧪 3. Methodology (with Visual)
[Scope & Discovery] → [Network & Protocol Review] → [Redundancy & Backup Check] → [Simulated Failures & Threat Scenarios] → [Gaps & Recommendations] → [Resilience Strategy]
Phases:
- 🧭 Discovery & Mapping
- 🔐 Security & Isolation
- 🔄 Recovery & Continuity
📦 4. Deliverables to the Client
- 🗺️ OT Asset & Dependency Map
- 🔐 Segmentation & Firewall Audit Report
- ⚡ Industrial Protocol Security Findings
- ⏱️ Recovery Readiness & RTO Analysis
- 📉 Resilience Gaps & Risk Matrix
- 📄 OT Resilience Playbook
- ⚠️ Threat Simulation Report (Optional)
- 🏆 OT Resilience Certification (optional)
🤝 5. What We Need from You (Client Requirements)
- ✅ Plant/site network topology diagrams
- ✅ Asset inventory or access for discovery
- ✅ Access to OT/ICS network segments
- ✅ System & vendor documentation (PLC, HMI, etc.)
- ✅ Available maintenance/testing windows
- ✅ On-site coordination with plant/IT/OT teams
🧰 6. Tools & Technology Stack
- 🧭 Asset Discovery: Nozomi Guardian, Claroty, Tenable.ot
- 🌐 Network Analysis: Wireshark, TShark, NetFlow tools
- 🔒 Firewall & Segmentation: FortiAnalyzer, Cisco FMC
- 🔁 Redundancy & Backup: Acronis for OT, Veritas, custom scripts
- ⚠️ Threat Simulation: Caldera for ICS, Red Canary scripts
- 📋 Documentation: Draw.io, Confluence, Lucidchart
🚀 7. Engagement Lifecycle (Lead → Closure)
1. Discovery & Planning → 2. Asset Mapping → 3. Security & Segmentation Audit → 4. Failure/Disruption Simulation → 5. Resilience Review → 6. Fix Plan → 7. Closure & Reassessment
🌟 8. Why Sherlocked Security? (Our USP)
| Feature | Sherlocked Advantage |
|---|---|
| 🏭 Deep OT Experience | Served power plants, transport hubs, factories |
| 📡 Protocol-Aware Testing | Understands Modbus, DNP3, BACnet threats |
| 🔁 Recovery-Driven | Focus on keeping uptime & failover integrity |
| ⚠️ Failure Simulation | Simulates real ICS outages & comms loss |
| 📘 Regulatory Mapping | Aligns with NIST, IEC, ISA, and CISA standards |
📚 9. Real-World Case Studies
🔌 Power Substation – ICS Resilience Testing
Scenario: ICS network lacked firewall segmentation
Test: Simulated misconfigured Modbus packet storm
Result: Network outage with recovery gap >6 hours
Fixes: Implemented VLAN-based segmentation, offline backup policy
🏭 Automotive Assembly – PLC Disruption Simulation
Scenario: PLC devices lacked redundancy
Test: Injected PLC failure simulation during shift
Impact: Line halt, manual override failed
Fixes: Added redundant ladder logic backups and recovery script
🛡️ 10. SOP – Standard Operating Procedure
- Identify OT network scope and participants
- Perform asset discovery and dependency mapping
- Analyze network segmentation and firewall rules
- Review protocols and device-level controls
- Simulate realistic disruption scenarios
- Evaluate recovery plans and RTOs
- Deliver recommendations and playbook
- Support optional retesting and gap validation
📋 11. Sample OT Resilience Checklist (Preview)
- Inventory all OT assets and their interdependencies.
- Review segmentation between IT and OT networks.
- Identify key HMIs, PLCs, and safety devices.
- Validate backup and failover mechanisms.
- Simulate protocol-based disruption scenarios.
- Analyze current RTO vs actual recovery times.
- Evaluate device and firmware update policies.
- Test isolation strategies for infected devices.
- Review human response protocols during outages.
- Provide actionable, standards-aligned recovery plan.
📬 Contact Us or 📅 Book a Consultation