Farewell (2009)

An intricate thriller about an ordinary man thrust into the biggest theft of Soviet information of the Cold War. Right after the Soviet invasion of Afghanistan. A French businessman based in Moscow, Pierre Froment, makes an unlikely connection with Grigoriev, a senior KGB officer disenchanted with what the Communist ideal has become under Brezhnev. Grigoriev begins passing Froment highly sensitive information about the Soviet spy network in the US.

Source: TMDb