local smb = require "smb" local stdnse = require "stdnse" local string = require "string" local table = require "table" description = [[ 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. Running NetShareEnumAll will work anonymously against Windows 2000, and requires a user-level account on any other Windows version. Calling NetShareGetInfo 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. Even if 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. ]] --- --@usage -- nmap --script smb-enum-shares.nse -p445 -- sudo nmap -sU -sS --script smb-enum-shares.nse -p U:137,T:139 -- --@output -- Host script results: -- | smb-enum-shares: -- | | ADMIN$ -- | | | Type: STYPE_DISKTREE_HIDDEN -- | | | Comment: Remote Admin -- | | | Users: 0, Max: -- | | | Path: C:\WINNT -- | | | Anonymous access: -- | | |_ Current user ('administrator') access: READ/WRITE -- | | C$ -- | | | Type: STYPE_DISKTREE_HIDDEN -- | | | Comment: Default share -- | | | Users: 0, Max: -- | | | Path: C:\ -- | | | Anonymous access: -- | | |_ Current user ('administrator') access: READ -- | | IPC$ -- | | | Type: STYPE_IPC_HIDDEN -- | | | Comment: Remote IPC -- | | | Users: 1, Max: -- | | | Path: -- | | | Anonymous access: READ -- |_ |_ |_ Current user ('administrator') access: READ ----------------------------------------------------------------------- author = "Ron Bowes" copyright = "Ron Bowes" license = "Same as Nmap--See http://nmap.org/book/man-legal.html" categories = {"discovery","intrusive"} dependencies = {"smb-brute"} hostrule = function(host) return smb.get_port(host) ~= nil end action = function(host) local status, shares, extra local response = {} -- Get the list of shares status, shares, extra = smb.share_get_list(host) if(status == false) then return stdnse.format_output(false, string.format("Couldn't enumerate shares: %s", shares)) end -- Find out who the current user is local result, username, domain = smb.get_account(host) if(result == false) then username = "" domain = "" end if(extra ~= nil and extra ~= '') then table.insert(response, extra) end for i = 1, #shares, 1 do local share = shares[i] local share_output = {} share_output['name'] = share['name'] if(type(share['details']) ~= 'table') then share_output['warning'] = string.format("Couldn't get details for share: %s", share['details']) else local details = share['details'] table.insert(share_output, string.format("Type: %s", details['sharetype'])) table.insert(share_output, string.format("Comment: %s", details['comment'])) table.insert(share_output, string.format("Users: %s, Max: %s", details['current_users'], details['max_users'])) table.insert(share_output, string.format("Path: %s", details['path'])) end -- A share of 'NT_STATUS_OBJECT_NAME_NOT_FOUND' indicates this isn't a fileshare if(share['user_can_write'] == "NT_STATUS_OBJECT_NAME_NOT_FOUND") then -- Print details for a non-file share if(share['anonymous_can_read']) then table.insert(share_output, "Anonymous access: READ ") else table.insert(share_output, "Anonymous access: ") end -- Don't bother printing this if we're already anonymous if(username ~= '') then if(share['user_can_read']) then table.insert(share_output, "Current user ('" .. username .. "') access: READ ") else table.insert(share_output, "Current user ('" .. username .. "') access: ") end end else -- Print details for a file share if(share['anonymous_can_read'] and share['anonymous_can_write']) then table.insert(share_output, "Anonymous access: READ/WRITE") elseif(share['anonymous_can_read'] and not(share['anonymous_can_write'])) then table.insert(share_output, "Anonymous access: READ") elseif(not(share['anonymous_can_read']) and share['anonymous_can_write']) then table.insert(share_output, "Anonymous access: WRITE") else table.insert(share_output, "Anonymous access: ") end if(username ~= '') then if(share['user_can_read'] and share['user_can_write']) then table.insert(share_output, "Current user ('" .. username .. "') access: READ/WRITE") elseif(share['user_can_read'] and not(share['user_can_write'])) then table.insert(share_output, "Current user ('" .. username .. "') access: READ") elseif(not(share['user_can_read']) and share['user_can_write']) then table.insert(share_output, "Current user ('" .. username .. "') access: WRITE") else table.insert(share_output, "Current user ('" .. username .. "') access: ") end end end table.insert(response, share_output) end return stdnse.format_output(true, response) end