This PoC Ransomware Could Poison Water Supply! Over 1500 PLC Systems open to Ransomeware attack. Georgia Institute of Technology researchers created a proof-of-concept ransomware that, in a simulated environment, was able to gain control of a water treatment plant and threaten to shut off the entire water supply or poison the city’s water supply. If the owners pay, they get their control over the PLC back. But if not, the hackers could malfunction water plant, or worse, dump life-threatening amounts of chlorine in water supplies that could potentially poison entire cities.
Source: https://thehackernews.com/2017/02/scary-scada-ransomware.html