How to Crack Passwords for PLCs and HMIs Using Free Tools
Programmable Logic Controllers (PLCs) and Human Machine Interfaces (HMIs) are widely used in industrial automation and control systems. However, sometimes these devices are protected by passwords that are forgotten, lost or set by someone who has left the company. This can cause problems when engineers need to update or troubleshoot the devices.
Fortunately, there are some free tools available on the internet that claim to be able to crack passwords for various PLCs and HMIs from different manufacturers. These tools exploit vulnerabilities in the devices or their communication protocols to extract the passwords in clear text or bypass them altogether.
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However, these tools also come with a risk: they may deliver malware to your computer or your industrial network. Some of these tools have been found to exploit a zero-day vulnerability in DirectLogic PLCs from AutomationDirect[^1^], and others have been observed to drop the Sality malware[^1^], which can steal cryptocurrency, block antivirus updates and compromise other systems.
Therefore, before using any of these tools, you should be aware of the potential consequences and take precautions such as:
Using a separate computer that is not connected to your industrial network or the internet.
Scanning the tools with an updated antivirus software before running them.
Backing up your PLC and HMI projects and data before attempting to crack them.
Contacting the device manufacturer or vendor for official support or password recovery options.
Some of the free tools that claim to crack passwords for PLCs and HMIs include:
ALL PLC UNLOCK BD TOOL FREE DOWNLOAD v4.2[^2^], which supports devices from Omron, Siemens, ABB, Delta Automation, Fuji Electric, Mitsubishi Electric, Pro-face (Schneider Electric), Vigor, Allen-Bradley (Rockwell Automation), Panasonic, LG, Fatek, and IDEC.
PLC Password Unlock[^3^], which offers password cracking services for devices from Siemens, Delta Automation, Mitsubishi Electric, Allen-Bradley (Rockwell Automation), Omron, LG, Fatek, IDEC and Fuji Electric.
Crack Password PLC Delta[^4^], which provides password cracking software for Delta Automation devices such as DVP SS2, SX2 and SA2 series.
In conclusion, cracking passwords for PLCs and HMIs using free tools can be a tempting solution for engineers who face this problem. However, it also involves significant risks of malware infection and system compromise. Therefore, it is advisable to use these tools with caution and only as a last resort.
If you decide to use one of the free tools to crack passwords for PLCs and HMIs, you should follow these steps:
Download the tool that matches your device model and manufacturer from a reputable source.
Scan the tool with an updated antivirus software before running it.
Connect your computer to the PLC or HMI using the appropriate cable and port.
Run the tool and follow the instructions on the screen. Depending on the tool, you may need to enter some information about the device or select some options.
Wait for the tool to crack the password or bypass it. This may take a few seconds or minutes depending on the device and the tool.
Once the password is cracked or bypassed, you should be able to access the device and its project or data. You can then change the password or remove it if you wish.
However, you should also be aware that using these tools may have some negative effects such as:
Voiding the warranty of your device or violating its license agreement.
Causing damage to your device or its project or data if the tool is not compatible or contains errors.
Allowing malware to infect your computer or your industrial network if the tool is malicious or compromised.
Exposing your device or network to further attacks if the tool exploits a vulnerability that is not patched.
Therefore, you should use these tools at your own risk and responsibility. You should also consider contacting the device manufacturer or vendor for official support or password recovery options before resorting to these tools. 29c81ba772