Google soon discovered it was not the only victim. As investigators traced the attack further back to the attackers’ command-and-control server, they found trails leading to dozens of American companies, many in Silicon Valley—Adobe, Intel, Juniper Networks—and others that were not. The body count included defense contractors, the cybersecurity company Akamai, Dow Chemical, Morgan Stanley, and many more that—to this day—have refused to even acknowledge that they were breached.

