By Jim Finkle LAS VEGAS (Reuters) – Security researchers at Kaspersky Lab said they have uncovered a cyber espionage operation that successfully penetrated two spy agencies and hundreds of government and military targets in Europe and the Middle East since the beginning of this year. The hackers, according to Kaspersky, were likely backed by a nation state and used techniques and tools similar to ones employed in two other high-profile cyber espionage operations that Western intelligence sources have linked to the Russian government. Kaspersky, a Moscow-based security software maker that also sells cyber intelligence reports, declined to say if it believed Russia was behind the espionage campaign.