Researcher finds ‘kill switch’, slows down global ransomware attack

A United Kingdom-based researcher is being called a hero after he discovered a way to slow down the spread of a ransomware strain that affected nearly 100 countries Friday and caused massive disruption to the U.K. healthcare system. The researcher, tweeting as @MalwareTechBlog, discovered a domain name frequently referenced in the code of the WannaCry ransomware that was spreading across the globe. “Upon running the sample in my analysis environment I instantly noticed it queried an unregistered domain, which I...