Microsoft says hacked software updater source of global Petya ransomware attack

Company says at least a portion of the infections stemmed from a software supply-chain attack with a legitimate MEDoc updater process. Some of the initial Petya ransomware infections started with Ukraine-based tax accounting software MEDoc from the firm M.E.Doc, Microsoft confirmed on Tuesday. While this connection was speculated by the media, security researchers and Ukraine’s Cyber Police, Microsoft now has solid evidence that some active infections began with a legitimate MEDoc updater process. Recently, hackers have been leveraging software supply...