Stuxnet is said to be a special kind of virus that is directed towards Siemens control systems. It can entered a system via a USB and other mobile means and looks for the
Siemens PLC connection with it. Once found, it modifies its logic to an uncertain extent that may cause devices to shutdown, or even may explode. Some websites claim this virus to be a myth but when i saw Siemens releasing a security/cleaning patch, i can say that there is something really like Stuxnet that exists today. You can read and download it here:
Siemens Security/Cleaning Patch for Stuxnet
If this really is a truth then this can bring a unique and a new threat revolution in the world of Industrial control systems. These type of viruses can really proved to be a disaster for the plants as modifications in the logics can cause shutdowns, inappropriate control or may be serious accidents. It is important to install proper firewalls and antivirus programs in order to keep our control servers cleaned from such attacks.
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