256 lines
8.2 KiB
Ruby
256 lines
8.2 KiB
Ruby
##
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# This module requires Metasploit: http://metasploit.com/download
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# Current source: https://github.com/rapid7/metasploit-framework
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##
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class MetasploitModule < Msf::Post
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include Msf::Post::Windows::Priv
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include Msf::Auxiliary::Report
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include Msf::Auxiliary::Scanner
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def initialize(info={})
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super(update_info(info,
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'Name' => 'Windows Gather Local Admin Search',
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'Description' => %q{
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This module will identify systems in a given range that the
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supplied domain user (should migrate into a user pid) has administrative
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access to by using the Windows API OpenSCManagerA to establishing a handle
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to the remote host. Additionally it can enumerate logged in users and group
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membership via Windows API NetWkstaUserEnum and NetUserGetGroups.
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},
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'License' => MSF_LICENSE,
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'Author' =>
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[
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'Brandon McCann "zeknox" <bmccann[at]accuvant.com>',
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'Thomas McCarthy "smilingraccoon" <smilingraccoon[at]gmail.com>',
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'Royce Davis "r3dy" <rdavis[at]accuvant.com>'
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],
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'Platform' => 'win',
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'SessionTypes' => [ 'meterpreter' ]
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))
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register_options(
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[
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OptBool.new('ENUM_USERS', [ true, 'Enumerates logged on users.', true]),
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OptBool.new('ENUM_GROUPS', [ false, 'Enumerates groups for identified users.', true]),
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OptString.new('DOMAIN', [false, 'Domain to enumerate user\'s groups for']),
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OptString.new('DOMAIN_CONTROLLER', [false, 'Domain Controller to query groups'])
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])
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end
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def setup
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super
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# This datastore option can be modified during runtime.
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# Saving it here so the modified value remains with this module.
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@domain_controller = datastore['DOMAIN_CONTROLLER']
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if is_system?
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# running as SYSTEM and will not pass any network credentials
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print_error "Running as SYSTEM, module should be run with USER level rights"
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return
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else
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@adv = client.railgun.advapi32
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# Get domain and domain controller if options left blank
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if datastore['DOMAIN'].nil? or datastore['DOMAIN'].empty?
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user = client.sys.config.getuid
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datastore['DOMAIN'] = user.split('\\')[0]
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end
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if @domain_controll.nil? and datastore['ENUM_GROUPS']
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@dc_error = false
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# Uses DC which applied policy since it would be a DC this device normally talks to
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cmd = "gpresult /SCOPE COMPUTER"
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# If Vista/2008 or later add /R
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if (sysinfo['OS'] =~ /Build [6-9]\d\d\d/)
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cmd << " /R"
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end
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res = cmd_exec("cmd.exe","/c #{cmd}")
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# Check if RSOP data exists, if not disable group check
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unless res =~ /does not have RSOP data./
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dc_applied = /Group Policy was applied from:\s*(.*)\s*/.match(res)
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if dc_applied
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@domain_controller = dc_applied[1].strip
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else
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@dc_error = true
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print_error("Could not read RSOP data, will not enumerate users and groups. Manually specify DC.")
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end
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else
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@dc_error = true
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print_error("User never logged into device, will not enumerate users and groups. Manually specify DC.")
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end
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end
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end
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end
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# main control method
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def run_host(ip)
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connect(ip)
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end
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# http://msdn.microsoft.com/en-us/library/windows/desktop/aa370669(v=vs.85).aspx
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# enumerate logged in users
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def enum_users(host)
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userlist = Array.new
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begin
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# Connect to host and enumerate logged in users
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winsessions = client.railgun.netapi32.NetWkstaUserEnum("\\\\#{host}", 1, 4, -1, 4, 4, nil)
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rescue ::Exception => e
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print_error("Issue enumerating users on #{host}")
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return userlist
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end
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return userlist if winsessions.nil?
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count = winsessions['totalentries'] * 2
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startmem = winsessions['bufptr']
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base = 0
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userlist = Array.new
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begin
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mem = client.railgun.memread(startmem, 8*count)
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rescue ::Exception => e
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print_error("Issue reading memory for #{host}")
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vprint_error(e.to_s)
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return userlist
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end
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# For each entry returned, get domain and name of logged in user
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begin
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count.times{|i|
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temp = {}
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userptr = mem[(base + 0),4].unpack("V*")[0]
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temp[:user] = client.railgun.memread(userptr,255).split("\0\0")[0].split("\0").join
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nameptr = mem[(base + 4),4].unpack("V*")[0]
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temp[:domain] = client.railgun.memread(nameptr,255).split("\0\0")[0].split("\0").join
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# Ignore if empty or machine account
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unless temp[:user].empty? or temp[:user][-1, 1] == "$"
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# Check if enumerated user's domain matches supplied domain, if there was
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# an error, or if option disabled
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data = ""
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if datastore['DOMAIN'].upcase == temp[:domain].upcase and not @dc_error and datastore['ENUM_GROUPS']
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data << " - Groups: #{enum_groups(temp[:user]).chomp(", ")}"
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end
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line = "\tLogged in user:\t#{temp[:domain]}\\#{temp[:user]}#{data}\n"
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# Write user and groups to notes database
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db_note(host, "#{temp[:domain]}\\#{temp[:user]}#{data}", "localadmin.user.loggedin")
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userlist << line unless userlist.include? line
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end
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base = base + 8
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}
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rescue ::Exception => e
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print_error("Issue enumerating users on #{host}")
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vprint_error(e.backtrace)
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end
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return userlist
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end
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# http://msdn.microsoft.com/en-us/library/windows/desktop/aa370653(v=vs.85).aspx
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# Enumerate groups for identified users
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def enum_groups(user)
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grouplist = ""
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dc = "\\\\#{@domain_controller}"
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begin
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# Connect to DC and enumerate groups of user
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usergroups = client.railgun.netapi32.NetUserGetGroups(dc, user, 0, 4, -1, 4, 4)
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rescue ::Exception => e
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print_error("Issue connecting to DC, try manually setting domain and DC")
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vprint_error(e.to_s)
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return grouplist
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end
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count = usergroups['totalentries']
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startmem = usergroups['bufptr']
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base = 0
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begin
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mem = client.railgun.memread(startmem, 8*count)
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rescue ::Exception => e
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print_error("Issue reading memory for groups for user #{user}")
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vprint_error(e.to_s)
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return grouplist
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end
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begin
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# For each entry returned, get group
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count.to_i.times{|i|
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temp = {}
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groupptr = mem[(base + 0),4].unpack("V*")[0]
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temp[:group] = client.railgun.memread(groupptr,255).split("\0\0")[0].split("\0").join
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# Add group to string to be returned
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grouplist << "#{temp[:group]}, "
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if (i % 5) == 2
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grouplist <<"\n\t- "
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end
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base = base + 4
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}
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rescue ::Exception => e
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print_error("Issue enumerating groups for user #{user}, check domain")
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vprint_error(e.backtrace)
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return grouplist
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end
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return grouplist.chomp("\n\t- ")
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end
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# http://msdn.microsoft.com/en-us/library/windows/desktop/ms684323(v=vs.85).aspx
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# method to connect to remote host using windows api
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def connect(host)
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if @adv.nil?
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return
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end
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user = client.sys.config.getuid
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# use railgun and OpenSCManagerA api to connect to remote host
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manag = @adv.OpenSCManagerA("\\\\#{host}", nil, 0xF003F) # SC_MANAGER_ALL_ACCESS
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if(manag["return"] != 0) # we have admin rights
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result = "#{host.ljust(16)} #{user} - Local admin found\n"
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# Run enumerate users on all hosts if option was set
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if datastore['ENUM_USERS']
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enum_users(host).each {|i|
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result << i
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}
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end
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# close the handle if connection was made
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@adv.CloseServiceHandle(manag["return"])
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# Append data to loot table within database
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print_good(result.chomp("\n")) unless result.nil?
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db_loot(host, user, "localadmin.user")
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else
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# we dont have admin rights
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print_error("#{host.ljust(16)} #{user} - No Local Admin rights")
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end
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end
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# Write to notes database
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def db_note(host, data, type)
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report_note(
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:type => type,
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:data => data,
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:host => host,
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:update => :unique_data
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)
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end
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# Write to loot database
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def db_loot(host, user, type)
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p = store_loot(type, 'text/plain', host, "#{host}:#{user}", 'hosts_localadmin.txt', user)
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vprint_status("User data stored in: #{p}")
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end
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end
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