"What is perhaps the most striking from this report is the highly organised professionalism of the threat actor," said Mr Rik Ferguson, vice-president of security research at the cyber-security company Trend Micro and special adviser for Europol, the EU's law enforcement agency, who reviewed the report. He said it was clear that the hackers were highly skilled, well funded and operating with a clearly defined mission brief. Prodaft's involvement began in December, after a client was compromised as part of the SolarWinds breach.