https://www.theregister.co.uk/2017/10/11/israel_russia_kaspersky/

The brouhaha over Russian spies using Kaspersky antivirus to steal NSA exploits from a staffer's home PC took an explosive turn on Tuesday.

Essentially, it is now claimed Israeli spies hacked into Kaspersky's backend systems only to find Russian snoops secretly and silently using the software as a global search engine. Kremlin agents were observed in real-time sweeping computers worldwide for American cyber-weapons, and then extracting any matching files. The Russians, it is claimed, hacked Kaspersky's servers to harvest any suspicious data flagged up by the antivirus that matched known codenames for American software exploits.