A year on, a researcher asks: Could the Norsk Hydro attack have been state-sponsored?
Multiple European utilities are investigating the incident.
Cyber Command looks to have uploaded its biggest cache of malware on a North Korean holiday.
Researchers have dubbed the group Hexane, and they say it has been particularly active in recent months.
Microsoft and the NSA already have sounded the alarm. DHS said it was able to use BlueKeep to execute remote code on a computer running Microsoft Windows 2000.
ICS security firm Dragos has briefed over 20 utilities on the new activity.