Class: Rex::Proto::SMB::Evasions

Inherits:
Object
  • Object
show all
Defined in:
lib/rex/proto/smb/evasions.rb

Constant Summary collapse

EVASION_NONE = 
0
EVASION_LOW = 
1
EVASION_HIGH = 
2
EVASION_MAX = 
3

Class Method Summary collapse

Class Method Details

.make_named_pipe_path(level, pipe) ⇒ Object

Obscures a named pipe pathname via leading and trailing slashes



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# File 'lib/rex/proto/smb/evasions.rb', line 38

def self.make_named_pipe_path(level, pipe)
  case level.to_i
    when EVASION_LOW
      return ('\\' * (1024 + rand(512))) + pipe
    when EVASION_HIGH, EVASION_MAX
      return ('\\' * (1024 + rand(512))) + pipe + ('\\' * (1024 + rand(512)))
    else
      return '\\' + pipe
  end
end

.make_offset_filler(level, max_size = 60000, min_size = 512) ⇒ Object

Add bogus filler at the end of the SMB packet and before the data



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# File 'lib/rex/proto/smb/evasions.rb', line 15

def self.make_offset_filler(level, max_size = 60000, min_size = 512)

  if (max_size < 0)
    max_size = 4096
  end

  if (min_size < max_size)
    min_size = max_size - 1
  end

  case level.to_i
    when EVASION_LOW
      Rex::Text.rand_text(32)
    when EVASION_HIGH
      Rex::Text.rand_text( rand(max_size - min_size) + min_size )
    when EVASION_MAX
      Rex::Text.rand_text( rand(max_size) )
    else EVASION_NONE
      return ''
  end
end

.make_trans_named_pipe_name(level) ⇒ Object

Obscures the TransactNamedPipe PIPE\ string



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# File 'lib/rex/proto/smb/evasions.rb', line 50

def self.make_trans_named_pipe_name(level)
  case level.to_i
    when EVASION_LOW
      return ('\\' * (256 - rand(64)) + 'PIPE\\')
    when EVASION_HIGH
      return Rex::Text.rand_text(512 - rand(128))
    when EVASION_MAX
      return Rex::Text.rand_text(1024 - rand(256))
    else
      return '\\PIPE\\'
  end
end