49 lines
1.1 KiB
Ruby
49 lines
1.1 KiB
Ruby
##
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# This module requires Metasploit: http://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'
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class MetasploitModule < Msf::Encoder
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# Below normal ranking because this will produce incorrect code a lot of
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# the time.
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Rank = LowRanking
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def initialize
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super(
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'Name' => 'Generic ${IFS} Substitution Command Encoder',
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'Description' => %q{
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This encoder uses standard Bourne shell variable substitution
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to avoid spaces without being overly fancy.
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},
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'Author' => 'egypt',
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'Arch' => ARCH_CMD,
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'Platform' => 'unix',
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'EncoderType' => Msf::Encoder::Type::CmdUnixIfs)
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end
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#
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# Encodes the payload
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#
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def encode_block(state, buf)
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# Skip encoding for empty badchars
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if state.badchars.length == 0
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return buf
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end
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# Skip encoding unless space is a badchar
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unless state.badchars.include?(" ")
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return buf
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end
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buf.gsub!(/\s/, '${IFS}')
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return buf
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end
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end
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