the C$ and ipc$ shares

[wymerzp () sbu edu]

Hi pen-testers et al,
I am new to the whole 'pen-testing' science and am trying to work through the book Hacking Exposed 5th ed (alas, the 
going is slow because Computer Org and Database class takes up my time). I have been testing the "null session" 
vulnerability on Windows machines. I am able to connect to the IPC$ share of a computer and enumerate users (using 
enum.exe), I can use Sid2User and User2Sid to do the same, I have also had success using the command: net use * 
\\xxx.xxx.xxx.xxx\SharedDocs to connect to the Shared Folders of a machine. The question that I pose is two-fold: 1) as 
a pseudo/learning pen-tester, when you are connected to the SharedDocs folder is there anyway to delve further into a 
system? 2) If I can connect to the ShareDocs and IPC$ shares of a computer using the user name of "x" and a password of 
"" (null), why can't I do the same with the C$ share? Is this because the SharedDocs share is in the group 'everyone'? 
Thanks alot guys and happy coding! 

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