https://techcrunch.com/2017/10/05/russian-intelligence-reportedly-breached-the-nsa-in-2015-stealing-cybersecurity-strategy/

The NSA suffered a serious breach in 2015, exposing the agency’s cyberwarfare strategy, including its own defenses and methods of attacking foreign networks, reports The Wall Street Journal today. Russian intelligence is said to be behind the attack, and software from Russia-based Kaspersky labs is suggested to have been their vector.

Amazingly, the data in question is reported to have been taken home by an NSA contractor, who was somehow compromised through their use of Kaspersky’s antivirus software. How exactly this would work is not explained, although it is speculated that it may be related to the practice of downloading and storing files it thought were suspicious (e.g. malware executables) on its servers. We’ve contacted the company for more information.