Use below Dynamic Management View (DMV) queries to get all the dimension and attributes of your cube
 
SELECT 
       [CATALOG_NAME]
as [Database],
       CUBE_NAME AS [Cube],
       [DIMENSION_UNIQUE_NAME]
AS [Dimension],
       HIERARCHY_DISPLAY_FOLDER
AS [FOLDER],
       HIERARCHY_CAPTION
AS [DIMENSION ATTRIBUTE],
       HIERARCHY_IS_VISIBLE
AS [VISIBLE]
FROM 
       $system.MDSchema_hierarchies
WHERE  
       CUBE_NAME  ='My Cube Name' AND  
       HIERARCHY_ORIGIN=2
ORDER BY
       [DIMENSION_UNIQUE_NAME]
Note: Replace 'My Cube Name' with your cube name
 
 
