Individual skill
performing-s7comm-protocol-security-analysis
Perform security analysis of Siemens S7comm and S7CommPlus protocols used by SIMATIC S7 PLCs to identify vulnerabilities including replay attacks, integrity bypass, unauthorized CPU stop commands, and program download manipulation exploiting weaknesses in S7-300, S7-400, S7-1200, and S7-1500 controllers.
internal/tools/skills/data/ot-ics-security/performing-s7comm-protocol-security-analysis/SKILL.md
Source commit d42f381ad34843e71a42658e5c57290c713e85af
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- Instructions only
- Last checked
- Nov 9, 2026
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- Repository last updated
- Nov 8, 2026
- License
- Apache-2.0
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- cybersecurity Repository topic
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- golang Repository topic
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- ot-security Declared skill tag
- ics Declared skill tag
- s7comm Declared skill tag
- siemens Declared skill tag
- plc-security Declared skill tag
- protocol-analysis Declared skill tag
- scada Declared skill tag
- vulnerability-assessment Declared skill tag
- security Derived category
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# Performing S7comm Protocol Security Analysis
## When to Use
- When assessing the security posture of Siemens SIMATIC S7 PLC environments
- When building detection rules for S7comm-based attacks against S7-300/400/1200/1500 controllers
- When performing a security audit of Siemens Step 7/TIA Portal communications
- When investigating suspected unauthorized access to Siemens PLC programs
- When evaluating S7CommPlus integrity mechanisms and their bypass potential
**Do not use** for scanning production Siemens PLCs without authorization and a test plan (this can crash controllers), for non-Siemens protocol analysis (see detecting-modbus-command-injection-attacks for Modbus), or for modifying PLC programs in a production environment.
## Most Often Missed & How to Confirm
