In late 2016, the Kaspersky Lab Industrial Control Systems Cyber Emergency Response Team (Kaspersky Lab ICS CERT) reported on phishing attacks that were primarily targeting industrial companies from the metallurgy, electric power, construction, engineering and other sectors. As further research demonstrated, this was just part of a bigger story that began much earlier and is unlikely to end any time soon.

https://securelist.com/nigerian-phishing-industrial-companies-under-attack/78565/