Russian hackers used flaw in Microsoft Windows to spy on NATO, a new report says

WASHINGTON — A Russian hacking group probably working for the government has been exploiting a previously unknown flaw in Microsoft’s Windows operating system to spy on NATO, the Ukrainian government, a U.S. university researcher and other national security targets, according to a new report.

The group has been active since at least 2009, according to research by iSight Partners, a cybersecurity firm. Its targets in the recent campaign also included a Polish energy firm, a Western European government agency and a French telecommunications firm.

“This is consistent with espionage activity,” said iSight senior director Stephen Ward. “All indicators from a targeting and lures perspective would indicate espionage with Russian national interests.”