(JTA) – Israeli intelligence discovered that Russian hackers were using antivirus software to steal classified information from the United States, The New York Times reported. The antivirus software is made by a Russian company, Kaspersky Lab, used by 400 million people worldwide, including officials at about two dozen American government agencies. The discovery led the Department of Homeland Security last month to order all federal executive branch agencies to stop using Kaspersky products, giving agencies 90 days to remove the software. Classified documents reportedly were stolen from a national security agency. The Times reported that the national security agency, the White House, the Israeli Embassy and the Russian Embassy would not comment for its story. Kaspersky Lab denied any knowledge of or involvement in the Russian hacking.

The intelligence came from Israel’s 2014 hack into Kaspersky’s corporate systems, which was discovered by the company a year later. The Times reported that Israeli intelligence officers told the NSA that they uncovered evidence that the Russian government hackers were using the access to U.S. officials’ computers through the Kaspersky antivirus software to search for American government classified programs and providing any information to Russian intelligence. Israeli intelligence gave the NSA evidence including screenshots and other documentation, the newspaper reported, citing unnamed sources.