US officials monitoring for cyber threats to the nation's critical infrastructure became aware several months ago of suspicious activity that's now been linked to one of the largest hacking operations in history, three sources familiar with the situation told CNN.
원문출처 : https://www.cnn.com/2020/12/18/politics/us-government-hack-early-signs/index.html
원문출처 : https://www.cnn.com/2020/12/18/politics/us-government-hack-early-signs/index.html