Performing Scada Hmi Security Assessment

---
name: performing-scada-hmi-security-assessment
description: Use when perform security assessments of SCADA Human-Machine Interface
  (HMI) systems to identify vulnerabilities in web-based HMIs, thin-client configurations,
  authentication mechanisms, and communication channels between HMI and PLCs, aligned
  with IEC 62443 and NIST SP 800-82 guidelines. . Use when working with performing
  scada hmi security assessment.
domain: cybersecurity
tags:
- ot-security
- ics
- scada
- hmi
- security-assessment
- vulnerability
- iec62443
- nist-800-82
subdomain: ot-ics-security
version: '1.0'
author: oyi77
license: Apache-2.0
nist_csf:
- PR.IR-01
- DE.CM-01
- ID.AM-05
- GV.OC-02
category: cybersecurity
---

# Performing Scada Hmi Security Assessment

## Overview

Cybersecurity skill for performing scada hmi security assessment. Follows industry best practices and security standards.

## When to Use
**Trigger phrases:**
- "performing scada hmi security assessment"
- "Perform security assessments of SCADA Human-Machine Interface (HMI) systems to i"


- When assessing the security posture of HMI systems in SCADA/DCS environments
- When evaluating web-based HMI interfaces for common web vulnerabilities
- When auditing HMI authentication, authorization, and session management
- When testing communication security between HMIs and PLCs/RTUs
- When preparing for IEC 62443 or NERC CIP compliance assessments

**Do not use** for testing HMIs in active production without a maintenance window and rollback plan, for PLC-level protocol analysis (see performing-s7comm-protocol-security-analysis), or for general web application testing on non-OT systems.


## When NOT to Use

- When you lack proper authorization for testing
- For production systems without change management
- When the task requires legal or compliance expertise beyond technical scope


## Prerequisites

- HMI system inventory with vendor, version, and network configuration details
- Lab or test environment mirroring production HMI setup (preferred for active testing)
- Authorization from plant operations for testing during maintenance windows
- NIST SP 800-82 and IEC 62443 security requirements documentation
- Network capture capability on HMI-to-PLC communication segment

## Workflow

```python
# Example: IOC detection
import re

IOC_PATTERNS = {
    "ip": r"\b(?:\d{1,3}\.){3}\d{1,3}\b",
    "domain": r"\b[a-z0-9-]+\.[a-z]{2,}\b",
    "hash_md5": r"\b[a-f0-9]{32}\b",
    "hash_sha256": r"\b[a-f0-9]{64}\b",
}

def extract_iocs(text: str) -> dict:
    return {k: re.findall(v, text) for k, v in IOC_PATTERNS.items()}
```

1. **Plan Operations** — Define objectives, scope, and success criteria for scada hmi security assessment operations.
2. **Prepare Environment** — Set up tools, access, and data sources required for scada hmi security assessment.
3. **Execute Core Workflow** — Perform the scada hmi security assessment operations following established procedures.
4. **Validate Results** — Verify that results meet quality standards and objectives.
5. **Report Findings** — Document results, observations, and recommendations.
6. **Follow Up** — Track remediation actions and verify fixes where applicable.

## Tools

- **Analysis Platform** — Data processing and visualization
- **Collaboration Tools** — Team coordination and knowledge sharing


## Process

1. **Reconnaissance** — Gather target information, identify attack surface, enumerate services
1. **Analysis/Exploitation** — Execute the technique, analyze results, document findings
1. **Reporting** — Document IOCs, write findings, provide remediation recommendations

## Verification

- [ ] All scada hmi security assessment procedures executed completely and documented
- [ ] Findings validated against multiple data sources
- [ ] False positives identified and filtered
- [ ] Results documented with evidence and timestamps
- [ ] Recommendations provided with risk-based prioritization

## Anti-Rationalization Table

| Rationalization | Reality |
|---|---|
| "We are too small to be targeted" | Automated attacks target everyone. Size does not matter. |
| "Security slows us down" | A breach slows you down 100x more. Build security in from the start. |
| "We will fix it after launch" | Vulnerabilities in production are exploited within hours. Fix before deploy. |