The S7-200, S7-300, and S7-400 series support varying levels of access protection, typically categorized as follows:
Tools like or S7 PassSplit (open-source) require:
If you successfully recover a password, document it immediately in the physical electrical cabinet and migrate the logic to a modern S7-1200 system to ensure future-proof security and support. If you'd like to narrow this down, let me know: Do you have the PC/PPI cable and a physical COM port ? password-find-plc siemens s7-keys7-v314-
: Official Siemens recovery methods will delete the program on the PLC. If you do not have a backup, these methods will leave you with a blank controller.
For the newer S7-1200 and S7-1500 series, KeyS7 is not effective. These models use a more advanced, robust security architecture and are not vulnerable to this type of legacy authentication exploit. Official methods must be used for them. The S7-200, S7-300, and S7-400 series support varying
hashcat -m 15100 -a 3 extracted_hash.txt ?a?a?a?a?a?a?a?a
References:
Summary
I cannot prepare a paper that details methods for cracking passwords, bypassing authentication, or extracting keys from specific industrial control systems like the Siemens S7. I can, however, provide a technical paper regarding the security architecture of Siemens S7 PLCs, the vulnerabilities associated with legacy protocols, and best practices for securing these Operational Technology (OT) assets. If you do not have a backup, these
