Class: Rex::PeScan::Scanner::PopPopRetScanner

Inherits:
JmpRegScanner show all
Defined in:
lib/rex/pescan/scanner.rb

Instance Attribute Summary

Attributes inherited from Generic

#pe, #regex

Instance Method Summary collapse

Methods inherited from JmpRegScanner

#_build_byte_list, #_parse_ret, #_ret_size

Methods inherited from Generic

#initialize, #scan

Constructor Details

This class inherits a constructor from Rex::PeScan::Scanner::Generic

Instance Method Details

#config(param) ⇒ Object


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# File 'lib/rex/pescan/scanner.rb', line 162

def config(param)
  pops = _build_byte_list(0x58, (0 .. 7).to_a - [4]) # we don't want pop esp's...
  self.regex = Regexp.new("[#{pops}][#{pops}](\xc3|\xc2..)", nil, 'n')
end

#scan_section(section, param = {}) ⇒ Object


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# File 'lib/rex/pescan/scanner.rb', line 167

def scan_section(section, param={})

  index = 0

  hits  = [ ]

  while index < section.size && (index = section.index(regex, index)) != nil
    rva     = section.offset_to_rva(index)
    message = ''

    pops = section.read(index, 2)
    reg1 = Rex::Arch::X86.reg_name32(pops[0,1].unpack("C*")[0] & 0x7)
    reg2 = Rex::Arch::X86.reg_name32(pops[1,1].unpack("C*")[0] & 0x7)

    message = "pop #{reg1}; pop #{reg2}; "

    retsize = _ret_size(section, index+2)
    message += _parse_ret(section.read(index+2, retsize))

    index += 2 + retsize

    hits << [ rva, message ]
  end

  return hits
end