Attempts to list shares using the
srvsvc.NetShareEnumAll MSRPC function and
retrieve more information about them using
srvsvc.NetShareGetInfo. If access
to those functions is denied, a list of common share names are checked.
Finding open shares is useful to a penetration tester because there may be private files shared, or, if it's writable, it could be a good place to drop a Trojan or to infect a file that's already there. Knowing where the share is could make those kinds of tests more useful, except that determiing where the share is requires administrative privileges already.
NetShareEnumAll will work anonymously against Windows 2000, and
requires a user-level account on any other Windows version. Calling
requires an administrator account on all versions of Windows up to 2003, as well as Windows Vista
and Windows 7, if UAC is turned down.
NetShareEnumAll is restricted, attempting to connect to a share will always
reveal its existence. So, if
NetShareEnumAll fails, a pre-generated list of shares,
based on a large test network, are used. If any of those succeed, they are recorded.
After a list of shares is found, the script attempts to connect to each of them anonymously, which divides them into "anonymous", for shares that the NULL user can connect to, or "restricted", for shares that require a user account.
randomseed, smbbasic, smbport, smbsignSee the documentation for the smb library.
smbdomain, smbhash, smbnoguest, smbpassword, smbtype, smbusernameSee the documentation for the smbauth library.
nmap --script smb-enum-shares.nse -p445 <host> sudo nmap -sU -sS --script smb-enum-shares.nse -p U:137,T:139 <host>
Host script results: | smb-enum-shares: | | ADMIN$ | | | Type: STYPE_DISKTREE_HIDDEN | | | Comment: Remote Admin | | | Users: 0, Max: <unlimited> | | | Path: C:\WINNT | | | Anonymous access: <none> | | |_ Current user ('administrator') access: READ/WRITE | | C$ | | | Type: STYPE_DISKTREE_HIDDEN | | | Comment: Default share | | | Users: 0, Max: <unlimited> | | | Path: C:\ | | | Anonymous access: <none> | | |_ Current user ('administrator') access: READ | | IPC$ | | | Type: STYPE_IPC_HIDDEN | | | Comment: Remote IPC | | | Users: 1, Max: <unlimited> | | | Path: | | | Anonymous access: READ <not a file share> |_ |_ |_ Current user ('administrator') access: READ <not a file share>
Author: Ron Bowes
License: Same as Nmap--See http://nmap.org/book/man-legal.html