Chinese company Rafotech has been found to be responsible for the current epidemic of the "Fireball" malware, which has affected nearly 250 million computers worldwide. Fireball is usually installed by piggybacking on an installer of wanted software; it then hijacks the user's browser and can then proceed to do anything from spying to dropping additional malware.
https://www.notebookcheck.net/Chinese-Fireball-malware-infects-almost-250-million-computers.225148.0.html