65 lines
1.4 KiB
Ruby
65 lines
1.4 KiB
Ruby
module Rex
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module Proto
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module SMB
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class Evasions
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require 'rex/text'
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EVASION_NONE = 0
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EVASION_LOW = 1
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EVASION_HIGH = 2
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EVASION_MAX = 3
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# Add bogus filler at the end of the SMB packet and before the data
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def self.make_offset_filler(level, max_size = 60000, min_size = 512)
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if (max_size < 0)
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max_size = 4096
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end
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if (min_size < max_size)
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min_size = max_size - 1
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end
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case level
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when nil, EVASION_NONE
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return ''
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when EVASION_LOW
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Rex::Text.rand_text(32)
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when EVASION_HIGH
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Rex::Text.rand_text( rand(max_size - min_size) + min_size )
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when EVASION_MAX
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Rex::Text.rand_text( rand(max_size) )
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end
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end
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# Obscures a named pipe pathname via leading and trailing slashes
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def self.make_named_pipe_path(level, pipe)
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case level
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when nil, EVASION_NONE
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return '\\' + pipe
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when EVASION_LOW
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return ('\\' * (1024 + rand(512))) + pipe
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when EVASION_HIGH, EVASION_MAX
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return ('\\' * (1024 + rand(512))) + pipe + ('\\' * (1024 + rand(512)))
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end
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end
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# Obscures the TransactNamedPipe \PIPE\ string
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def self.make_trans_named_pipe_name(level)
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case level
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when nil, EVASION_NONE
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return '\\PIPE\\'
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when EVASION_LOW
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return ('\\' * (256 - rand(64)) + 'PIPE\\')
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when EVASION_HIGH
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return Rex::Text.rand_text(512 - rand(128))
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when EVASION_MAX
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return Rex::Text.rand_text(1024 - rand(256))
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end
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end
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end
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end
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end
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end |