Israel says Russians using Kaspersky window to steal US secrets

Russian hackers had stolen classified NSA materials from a contractor using the Kaspersky software on his home computer

It was a case of spies watching spies watching spies: Israeli intelligence officers looked on in real time as Russian government hackers searched computers around the world for the code names of American intelligence programmes.

What gave the Russian hacking, detected more than two years ago, such global reach was its improvised search tool - antivirus software made by a Russian company, Kaspersky Lab, that is used by 400 million people worldwide, including by officials at some two dozen American government agencies.

The Israeli officials who had hacked into Kaspersky’s own network alerted the United States to the broad Russian intrusion, which