I think the below fairly represents mainstream Christian thought on Russia:
Others see “Magog” as a general term used in Ezekiel’s day to identify barbarians living near the Black and Caspian Seas. Regardless of the exact locations of Magog, Tubal, and Meshek, there is no doubt that the general area includes portions of Russia and the former Soviet Union, and possibly some Arab countries.
So, yes, the Bible does mention Russia, although not by that name, in connection with the end times. Ezekiel 38—39 definitely refer to a nation coming from northern Asia to attack Israel. After the Cold War, Russia lost its super power status, making the fulfillment of Ezekiel’s prophecy seem unlikely in some people’s eyes. However, recent events have shown that Russia is gaining strength, and many believe that the invasion of Crimea is just a first step in Russia’s plan to restore its dominance in that hemisphere. It is also interesting to note that, in the Soviet era, Moscow was solidly aligned with several Muslim countries in opposition to Israel. Since the breakup of the Soviet Union, Russia has continued to make overtures to the Muslim world.
According to the Bible, there will come a time when Russia, in alliance with several other countries, will amass a huge army against Israel, with a view to plunder the Jews’ land. The nations aligned with Russia for this military endeavor are Persia (modern-day Iran), Put (modern-day Sudan), Cush (modern-day Libya), Gomer (part of modern-day Turkey), and Beth Togarmah (another portion of modern-day Turkey or possibly Syria). Most of these nations are currently militant Islamic states with an express hatred of Israel. Ezekiel says that, when the aggressors move against Israel, a few other nations (“Sheba and Dedan and the merchants of Tarshish”) will remonstrate, as will “all her villages”—possibly colonies (Ezekiel 38:13). Sheba and Dedan are associated with areas of northern Africa. Tarshish could be a reference to Spain (which colonized much of South America), Britain (which colonized the United States), or somewhere in eastern Africa. The objections to Magog’s aggression will fall on deaf ears, however, and the invasion will continue.
Some commentators believe this war is one of the events leading up to beginning of thetribulation. Others believe it will occur close to the midpoint of the tribulation, since Israel will be “dwelling without walls, and having neither bars nor gates” (Ezekiel 38:11)—in other words, Israel will feel secure at that time, possibly because of the covenant they have signed with the Antichrist (Daniel 9:27). Either way, this battle is distinct from the Battle of Armageddon, which occurs at the end of the tribulation.
Read more:http://www.gotquestions.org/Russia-end-times.html#ixzz3U8WBqYQ0