Trackman (2007)

Title: Putevoy obkhodchik (Russia)
Genre: Horror | Thriller
Country: Russia
Language: Russian

The story unfolds in the functioning lines of the Moscow Subway, as well as in the desolate ones--in the channels of underground rivers, the real tunnels of the centuries-old underground of Moscow. The scene is entangled with numerous legends and scary stories. It is there that the main characters fall into a trap; they are chased by an underground dweller. They have to survive or die.

http://www.imdb.com/title/tt0900381/