Rob Barry and Dustin Volz report: The hackers seemed to be everywhere. In 1 of the largest-ever corporate espionage efforts, cyberattackers alleged to be working for Chinas intelligence services stole volumes of intellectual property, security clearance details and other records from scores of companies over the past several years. They got access to systems with prospecting secrets for mining company Rio Tinto, and sensitive medical search for electronics and health-care giant Philips NV. They came in through cloud service providers, where companies thought their data was safely stored. Once they got in, they could freely and anonymously hop from client to client, and defied investigators attempts to kick them out for years. Cybersecurity investigators first identified aspects of the hack, called cloud Hopper by the surety researchers who first uncovered it, in 2016, and U.S. prosecutors charged ii Chinese nationals for the global functioning last December. The ii men remain at large. a palisade Street Journal investigation has found that the tone-beginning was much bigger than previously known. It goes far beyond the 14 unnamed companies listed in the indictment, stretching across at least a dozen cloud providers….. show more on wall Street Journal.