While hacking into chemical facility computer systems in order to turn valves or start pumps might not be the typical low hanging fruit that hackers go after, Homeland Security warned that Anonymous hacktivists may cyberattack industrial control systems. In fact, the Department of Homeland Security and Idaho National Laboratory have engaged in mock hack-offs to wreak havoc and to highlight the vulnerabilities at factories, electrical plants and chemical facilities. The bad guys on the Red Team used virtual tools to crack into and cause chaos in the real world of the good guys on the Blue Team. These hackers showed that a malicious attack that caused mayhem and a toxic spill at ACME Chemical company was as easy as point, click and destroy.
Source: Computer World