Hi,
base.dll is a dll file of AIMP3 which is a popular music player.
Website: http://aimp.ru/index.php
Download link: http://files.programki.net/aimp/aimp_3.55.1350.exe
2014-06-22 17:59:53 D:\Program Files\AIMP3\bass.dll Heur.Packed.Unknown[at]4294967295
Sample link: https://app.ccloud.com/#share/117676&3285a03cf1880317f36c2e2a942ea08c08cc34de