European and North American authorities disrupt massive ransomware network

Context: Ransomware criminals have crippled healthcare systems and governments with the help of networks of hijacked computers like Emotet.

• Ransomware works by scrambling a victim's data, allowing criminals to demand money in exchange for decoding software to repair the data.

The big picture: European Union police and the judicial agencies Europol and Eurojus, two Hague-based agencies, coordinated the operation with authorities in the Netherlands, Germany, the United States, the U.K., France, Lithuania, Canada and Ukraine.

Meanwhile: The FBI announced Wednesday that it arrested a Canadian as part of a bid to disrupt the ransomware gang NetWalker, which it said had targeted the health care sector. Included in the arrest was the seizure of nearly half a million dollars in cryptocurrency.

Thought bubble, via Zach Dorfman of the Aspen Institute: The sheer number of countries involved and scale of the operation and coordination headaches shows how serious a challenge cyber criminal groups and botnets have become.

• As Wired notes, it was a “global effort” that took down command-and-control infrastructure in 90 countries.
• And unlike a joint public-private action last year designed to hobble the massive Trickbot botnet, the move against Emotet appears aimed at permanently crushing it.

Go deeper: The rise and rise of ransomware