| name | performing-plc-firmware-security-analysis |
| description | Use when this skill covers analyzing Programmable Logic Controller (PLC) firmware for security vulnerabilities including hardcoded credentials, insecure update mechanisms, backdoor functions, memory corruption flaws, and undocumented debug interfaces. It addresses firmware extraction from common PLC platforms (Siemens S7, Allen-Bradley, Schneider Modicon), static analysis of firmware images, dynamic analysis in emulated environments, and comparison against known-good baselines to detect tampe... |
| domain | cybersecurity |
| tags | ["ot-security","ics","scada","industrial-control","iec62443","firmware-analysis","plc-security"] |
| subdomain | ot-ics-security |
| version | 1.0.0 |
| author | oyi77 |
| license | Apache-2.0 |
| nist_csf | ["PR.IR-01","DE.CM-01","ID.AM-05","GV.OC-02"] |
Performing Plc Firmware Security Analysis
Overview
Cybersecurity skill for performing plc firmware security analysis. Follows industry best practices and security standards.
When to Use
Trigger phrases:
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"performing plc firmware security analysis"
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"This skill covers analyzing Programmable Logic Controller (PLC) firmware for sec"
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When assessing PLC security as part of an IEC 62443 component security evaluation (IEC 62443-4-2)
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When validating firmware integrity after a suspected compromise or supply chain attack
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When evaluating the security of a new PLC platform before deployment in critical infrastructure
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When performing vulnerability research on industrial control system devices in an authorized lab
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When responding to an incident where PLC logic or firmware tampering is suspected
Do not use on live production PLCs without explicit authorization and safety controls in place. Firmware extraction and analysis should be performed on lab devices or offline backups. Never upload PLC firmware to public analysis services. See performing-ics-penetration-testing for authorized live testing procedures.
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
- Isolated lab environment with the target PLC hardware or an emulated environment
- PLC programming software for the target platform (Siemens TIA Portal, Rockwell Studio 5000, Schneider EcoStruxure)
- Firmware extraction tools (binwalk, firmware-mod-kit, JTAG/SWD debugger)
- Static analysis tools (Ghidra, IDA Pro, Binary Ninja with ARM/MIPS/PowerPC support)
- Understanding of PLC architecture (real-time OS, ladder logic execution, I/O scanning)
- Reference copy of known-good firmware for integrity comparison
Workflow
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",
: ,
}
() -> :
{k: re.findall(v, text) k, v IOC_PATTERNS.items()}
