SAN FRANCISCO — A Russian cybersecurity company issued a report on Monday saying that it had identified a sophisticated espionage campaign that has been in operation since 2007. The spy campaign targeted a range of government and diplomatic organizations, mostly in Eastern Europe and Central Asia, but also in Western Europe and North America.

Kaspersky Lab, the firm behind the discovery, said that digital clues suggested that the perpetrators were Russian-speaking but that the campaign did not appear to be the work of a nation-state.