mirror of
https://github.com/rapid7/metasploit-framework
synced 2024-11-12 11:52:01 +01:00
274 lines
6.4 KiB
Ruby
Executable File
274 lines
6.4 KiB
Ruby
Executable File
#!/usr/bin/env ruby
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msfbase = __FILE__
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while File.symlink?(msfbase)
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msfbase = File.expand_path(File.readlink(msfbase), File.dirname(msfbase))
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end
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$:.unshift(File.join(File.dirname(msfbase), 'lib'))
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$:.unshift(ENV['MSF_LOCAL_LIB']) if ENV['MSF_LOCAL_LIB']
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require 'rex'
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require 'msf/ui'
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require 'msf/base'
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OutStatus = "[*] "
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OutError = "[-] "
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$args = Rex::Parser::Arguments.new(
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"-i" => [ true, "Encode the contents of the supplied file path" ],
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"-m" => [ true, "Specifies an additional module search path" ],
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"-a" => [ true, "The architecture to encode as" ],
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"-t" => [ true, "The format to display the encoded buffer with (c, elf, exe, java, perl, raw, ruby, vba, vbs, loop-vbs)" ],
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"-b" => [ true, "The list of characters to avoid: '\\x00\\xff'" ],
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"-s" => [ true, "The maximum size of the encoded data" ],
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"-e" => [ true, "The encoder to use" ],
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"-o" => [ true, "The output file" ],
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"-c" => [ true, "The number of times to encode the data" ],
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"-n" => [ false, "Dump encoder information" ],
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"-h" => [ false, "Help banner" ],
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"-l" => [ false, "List available encoders" ])
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#
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# Dump the list of encoders
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#
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def dump_encoders(arch = nil)
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tbl = Rex::Ui::Text::Table.new(
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'Indent' => 4,
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'Header' => "Framework Encoders" + ((arch) ? " (architectures: #{arch})" : ""),
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'Columns' =>
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[
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"Name",
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"Rank",
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"Description"
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])
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cnt = 0
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$framework.encoders.each_module(
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'Arch' => arch ? arch.split(',') : nil) { |name, mod|
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tbl << [ name, mod.rank_to_s, mod.new.name ]
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cnt += 1
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}
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(cnt > 0) ? "\n" + tbl.to_s + "\n" : "\nNo compatible encoders found.\n\n"
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end
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#
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# Returns the list of encoders to try
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#
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def get_encoders(arch, encoder)
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encoders = []
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if (encoder)
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encoders << $framework.encoders.create(encoder)
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else
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$framework.encoders.each_module_ranked(
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'Arch' => arch ? arch.split(',') : nil) { |name, mod|
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encoders << mod.new
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}
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end
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encoders
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end
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#
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# Nuff said.
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#
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def usage
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$stderr.puts("\n" + " Usage: #{$0} <options>\n" + $args.usage)
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exit
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end
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# Defaults
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cmd = "encode"
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arch = nil
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badchars = ''
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space = nil
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encoder = nil
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fmt = nil
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input = $stdin
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options = ''
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delim = '_|_'
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output = nil
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ecount = 1
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# Parse the argument and rock that shit.
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$args.parse(ARGV) { |opt, idx, val|
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case opt
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when "-i"
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begin
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input = File.new(val)
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rescue
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$stderr.puts(OutError + "Failed to open file #{val}: #{$!}")
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exit
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end
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when "-m"
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$framework.modules.add_module_path(val)
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when "-l"
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cmd = "list"
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when "-n"
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cmd = "dump"
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when "-a"
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arch = val
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when "-c"
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ecount = val.to_i
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when "-b"
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badchars = Rex::Text.hex_to_raw(val)
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when "-s"
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space = val.to_i
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when "-t"
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if (val =~ /^(perl|ruby|rb|raw|c|js_le|js_be|java|exe|elf|vba|vbs|loop-vbs)$/)
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fmt = val
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else
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$stderr.puts(OutError + "Invalid format: #{val}")
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exit
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end
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when "-o"
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output = val
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when "-e"
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encoder = val
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when "-h"
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usage
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else
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if (val =~ /=/)
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options += ((options.length > 0) ? delim : "") + "#{val}"
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end
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end
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}
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if(not fmt and output)
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pre,ext = output.split('.')
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if(ext and not ext.empty?)
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fmt = ext
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end
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end
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# Initialize the simplified framework instance.
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$framework = Msf::Simple::Framework.create(
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:module_types => [ Msf::MODULE_ENCODER, Msf::MODULE_NOP ]
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)
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# Get the list of encoders to try
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encoders = get_encoders(arch, encoder)
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# Process the actual command
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case cmd
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when "list"
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$stderr.puts(dump_encoders(arch))
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when "dump"
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enc = encoder ? $framework.encoders.create(encoder) : nil
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if (enc)
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$stderr.puts(Msf::Serializer::ReadableText.dump_module(enc))
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else
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$stderr.puts(OutError + "Invalid encoder specified.")
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end
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when "encode"
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buf = input.read
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encoders.each { |enc|
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next if not enc
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begin
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# Imports options
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enc.datastore.import_options_from_s(options, delim)
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skip = false
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eout = buf.dup
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raw = nil
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1.upto(ecount) do |iteration|
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# Encode it up
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raw = enc.encode(eout, badchars)
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# Is it too big?
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if (space and space > 0 and raw.length > space)
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$stderr.puts(OutError + "#{enc.refname} created buffer that is too big (#{raw.length})")
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skip = true
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break
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end
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# Print it out
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$stderr.puts(OutStatus + "#{enc.refname} succeeded with size #{raw.length} (iteration=#{iteration})\n\n")
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eout = raw
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end
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next if skip
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case fmt
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when 'exe'
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exe = nil
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if(not arch or (arch.index(ARCH_X86)))
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exe = Msf::Util::EXE.to_win32pe($framework, raw)
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end
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if(arch and (arch.index( ARCH_X86_64 ) or arch.index( ARCH_X64 )))
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exe = Msf::Util::EXE.to_win64pe($framework, raw)
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end
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if(not output)
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$stdout.write(exe)
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else
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File.open(output, "wb") do |fd|
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fd.write(exe)
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end
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end
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when 'elf'
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elf = Msf::Util::EXE.to_linux_x86_elf($framework, raw)
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if(not output)
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$stdout.write(elf)
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else
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File.open(output, "wb") do |fd|
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fd.write(elf)
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end
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end
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when 'vba'
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exe = Msf::Util::EXE.to_win32pe($framework, raw)
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vba = Msf::Util::EXE.to_exe_vba(exe)
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if(not output)
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$stdout.write(vba)
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else
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File.open(output, "wb") do |fd|
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fd.write(vba)
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end
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end
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when 'vbs'
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vbs = Msf::Util::EXE.to_win32pe_vbs($framework, raw)
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if(not output)
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$stdout.write(vbs)
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else
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File.open(output, "wb") do |fd|
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fd.write(vbs)
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end
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end
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when 'loop-vbs'
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vbs = Msf::Util::EXE.to_win32pe_vbs($framework, raw, true)
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if(not output)
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$stdout.write(vbs)
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else
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File.open(output, "wb") do |fd|
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fd.write(vbs)
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end
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end
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else
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if(not output)
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$stdout.print(Msf::Simple::Buffer.transform(raw, fmt))
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else
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File.open(output, "wb") do |fd|
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fd.write(Msf::Simple::Buffer.transform(raw, fmt))
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end
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end
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end
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exit
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rescue => e
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$stderr.puts(OutError + "#{enc.refname} failed: #{e} #{e.backtrace}")
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end
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}
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$stderr.puts(OutError + "No encoders succeeded.")
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end
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