A Siemens Simatic S7-300 PLC, Stuxnet's target

2010

The Siemens Simatic S7-300 programmable logic controller, the class of industrial device Stuxnet was built to reprogram. Stuxnet altered centrifuge motor speeds at Natanz while replaying normal readings to the operators. This is the moment malware stopped being about data and started breaking physical machinery. The subject dates from 2010; the photograph itself is later.