Researchers with Arbor Networks ASERT team have been tracking a malware campaign targeting commercial manufacturing, and have uncovered various samples dating back to at least 2016.

Richard Hummel is Threat Intelligence Manager for Arbor Networks' ASERT Team, and he takes us through what they've discovered.
https://www.arbornetworks.com/blog/asert/innaput-actors-utilize-remote-access-trojan-since-2016-presumably-targeting-victim-files/