government agencies have been hit by the so-called ransomware. the software targets a flaw in microsoft windows, and now microsoft has released a security patch. it did back in march, but the virus hit networks that had not updated their systems with that patch, which microsoft stressed the importance of in statements sunday, also said this attack is a wake-up call for governments, kind of a remarkable warning from microsoft to governments, nsa in particular where this came from. >> let's get more on the global impact of this cyber attack. what could be in store today? cnn business and technology correspondent samuel burke live in london. >> good to see you, samuel. >> we report there 150 countries. we know there are new cases today. any yet in the united states and how do our viewers protect themselves this morning? >> reporter: good morning, dave. good morning, christine. the claws of this ransomware are still sinking in. if we want to get a preview of what's going to be happening in the united states, let's go to china, where they've already had their monday morning 40,000