Class: Rex::PeScan::Analyze::Fingerprint

Inherits:
Object
  • Object
show all
Defined in:
lib/rex/pescan/analyze.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(pe) ⇒ Fingerprint

Returns a new instance of Fingerprint.



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# File 'lib/rex/pescan/analyze.rb', line 10

def initialize(pe)
	self.pe = pe
end

Instance Attribute Details

#pe ⇒ Object

Returns the value of attribute pe.



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# File 'lib/rex/pescan/analyze.rb', line 8

def pe
  @pe
end

Instance Method Details

#config(param) ⇒ Object 



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# File 'lib/rex/pescan/analyze.rb', line 14

def config(param)
	@sigs = {}

	name = nil
	regx = ''
	epon = 0
	sidx = 0

	fd = File.open(param['database'], 'rb')
	fd.each_line do |line|
		case line
		when /^\s*#/
			next
		when /\[\s*(.*)\s*\]/
			if (name)
				@sigs[ name ] = [regx, epon]
			end
			name = $1 + " [#{ sidx+=1 }]"
			epon = 0
			next
		when /signature\s*=\s*(.*)/
			pat = $1.strip
			regx = ''
			pat.split(/\s+/).each do |c|
				next if c.length != 2
				regx << (c.index('?') ? '.' : "\\x#{c}")
			end
		when /ep_only\s*=\s*(.*)/
			epon = ($1 =~ /^T/i) ? 1 : 0
		end
	end

	if (name and ! @sigs[name])
		@sigs[ name ] = [regx, epon]
	end

	fd.close
end

#scan(param) ⇒ Object 



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# File 'lib/rex/pescan/analyze.rb', line 53

def scan(param)
	config(param)

	epa = pe.hdr.opt.AddressOfEntryPoint
	buf = pe.read_rva(epa, 256)

	@sigs.each_pair do |name, data|
		begin
		if (buf.match(Regexp.new('^' + data[0], nil, 'n')))
			$stdout.puts param['file'] + ": " + name
		end
		rescue RegexpError
			$stderr.puts "Invalid signature: #{name} #{data[0]}"
		end
	end
end