Hi,
1st you don't explain what exploit you try to run(more then few in metasploit), 2nd you didn't share any error from metasploit run command etc..
Do you get something like:
msf auxiliary(oracle_login) > run
[-] Failed to load the OCI library: cannot load such file -- oci8
[-] See
http://www.metasploit.com/redmine/projects/framework/wiki/OracleUsage for installation instructions
- Auxiliary module execution completed
?
And this is not for new Linux users, because you will need to make some system changes and install some packages mess from oracle to make this working. Your BackBox installation is x86 or X64?
If i get some real information maybe i can test on my side and try to write some paper/dock how this can be accomplished in BackBox.