dynPatchSelf.cc

dynPatchSelf.cc

// dynamic patch self function by [email protected]
#include <windows.h>
#include <algorithm>
#include <iterator>
using namespace std;
void hello()
{
    puts("Are You Helloing?");
}
int main(void)
{
    BYTE pattern[] = "\xCD\x03\xCD\x03\xCD\x03\xCD\x03";
    PBYTE pFound = search((PBYTE)main, &((PBYTE)main)[0x200], pattern, &pattern[sizeof(pattern) - 1]);
    VirtualProtect(pFound, 5, PAGE_EXECUTE_READWRITE, (PDWORD)&pattern);
    pFound[0] = '\xE8';
    *(PDWORD)&pFound[1] = (DWORD)hello - (DWORD)pFound - 5;
    asm __volatile__(".byte 0xCD;.byte 0x03;.byte 0xCD;.byte 0x03;.byte 0xCD;.byte 0x03;.byte 0xCD;.byte 0x03;");
    return 0;
}