This tool is part of a category of "PLC unlockers" that target older Siemens hardware (primarily S7-200 and some S7-300 models).
go to PLC247.com they sell a program for $80 that will tell you the password for any S7-300 MMC. I have used it several times. PLCTalk.net password-find-plc siemens s7-keys7-v314-
: Often has no default; if it was set, it must be known or wiped. This tool is part of a category of
Power on the PLC; it will automatically transfer the "empty" project to internal memory, effectively wiping the existing password-protected program : PLCTalk
./s7hashfind -f locked_cpu.bin -v 314
Run:
For some Siemens devices and software, default passwords are available. However, these are often well-documented and should not be relied upon for secure operations. Moreover, newer versions of software and firmware may not have default passwords set.