2022-11-7 16:42:0 Author: bbs.pediy.com(查看原文) 阅读量:19 收藏
1.在R0层申请一块内存，用来放置shellcode
2.R3修改shellcode的页属性+us、+rw，写入shellcode，shellcode末尾的代码需要还原MessageBoxA的指令
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__shellcode:
//int 3
mov eax, __end
mov[esp + 0xc], eax
pop eax
/*
.text:77D507EA 8B FF mov edi, edi
.text:77D507EC 55 push ebp
.text:77D507ED 8B EC mov ebp, esp
.text:77D507EF 83 3D BC 14 D7 77 00 cmp _gfEMIEnable, 0
*/
_emit 0x8B
_emit 0xFF
_emit 0x55
_emit 0x8B
_emit 0xEC
_emit 0x83
_emit 0x3D
_emit 0xBC
_emit 0x14
_emit 0xD7
_emit 0x77
_emit 0x00
jmp eax
__end :
3.创建中断门，负责在调用shellcode之前提权修改shellcode页属性+us，-NX
4.R3修改MessageBoxA的页属性+us、+rw
5.R3对MessageBoxA进行inlineHook
替换4条指令（12个字节）：
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//main.cpp
int main(int argc, char* argv[])
{
Driver d;
if (!d.loadDriver())
{
system("pause");
return 0;
}
printf("loadDriver suc\n");
int a = *(int*)MessageBoxA;
printf("MessageBoxA: %08x\n", a);
auto pShellCode = d.AllocMemory();
if (NULL == pShellCode)
{
printf("AllocMemory error\n");
system("pause");
return 0;
}
printf("pMem:0x%08x\n", pShellCode);
d.ChangeMemoryAttr(pShellCode);
printf("pMem: %s\n", pShellCode);
char* pShellCodeBegin = NULL;
char* pShellCodeEnd = NULL;
_asm
{
mov eax, __shellcode
mov pShellCodeBegin, eax
mov eax, __end
mov pShellCodeEnd, eax
jmp __end
__shellcode:
//int 3
mov eax, __end
mov[esp + 0xc], eax
pop eax
/*
.text:77D507EA 8B FF mov edi, edi
.text:77D507EC 55 push ebp
.text:77D507ED 8B EC mov ebp, esp
.text:77D507EF 83 3D BC 14 D7 77 00 cmp _gfEMIEnable, 0
*/
_emit 0x8B
_emit 0xFF
_emit 0x55
_emit 0x8B
_emit 0xEC
_emit 0x83
_emit 0x3D
_emit 0xBC
_emit 0x14
_emit 0xD7
_emit 0x77
_emit 0x00
jmp eax
__end :
}
memcpy(pShellCode, pShellCodeBegin, pShellCodeEnd - pShellCodeBegin);
memcpy(pShellCode, pShellCodeBegin, pShellCodeEnd - pShellCodeBegin);
char* str_pos = pShellCode + (pShellCodeEnd - pShellCodeBegin);
memcpy(str_pos, "hack", 5);
memcpy(pShellCode + 1, &str_pos, 4);
char intGate = d.CreateIntGate();
printf("intGate:%d\n", intGate);
d.ChangeMemoryAttr(MessageBoxA);
char hook[] = { "\xCD\x00\x90\xB8\xEF\xBE\xAD\xDE\xFF\xD0\x90\x90" };
hook[1] = intGate;
memcpy(MessageBoxA, hook, 12);
memcpy((char*)MessageBoxA + 4, &pShellCode, 4);
//__debugbreak();
system("pause");
char MsgBox_old[] = {"\x8B\xFF\x55\x8B\xEC\x83\x3D\xBC\x14\xD7\x77\x00"};
memcpy(MessageBoxA, MsgBox_old, 12);
printf("已还原\n");
system("pause");
return 0;
}
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//Driver.cpp
bool Driver::loadDriver()
{
auto h = OpenSCManagerA(NULL, NULL, SC_MANAGER_ALL_ACCESS);
if (NULL == h)
{
printf("OpenSCManagerA error:%d\n", GetLastError());
return false;
}
char path[260] = { 0 };
GetFullPathNameA("main.sys", 260, path, NULL);
printf("sys path:%s\n", path);
auto service = CreateServiceA(
h, "12345", "678910", SERVICE_ALL_ACCESS, SERVICE_KERNEL_DRIVER, SERVICE_DEMAND_START,
SERVICE_ERROR_IGNORE, path, NULL, NULL, NULL, NULL, NULL);
if (NULL == service)
{
CloseServiceHandle(h);
DeleteService(service);
printf("CreateServiceA error:%d\n", GetLastError());
return false;
}
if (!StartService(service, NULL, NULL))
{
DWORD dwErr = GetLastError();
if (dwErr != ERROR_SERVICE_ALREADY_RUNNING)
{
printf("运行驱动服务失败, %d\n", dwErr);
return false;
}
}
CloseServiceHandle(service);
CloseServiceHandle(h);
return true;
}
Driver::~Driver()
{
SC_HANDLE hServiceMgr = OpenSCManagerA(NULL, NULL, SC_MANAGER_ALL_ACCESS);
SC_HANDLE hServiceDDK = OpenServiceA(hServiceMgr, "12345", SERVICE_ALL_ACCESS);
SERVICE_STATUS SvrStatus;
ControlService(hServiceDDK, SERVICE_CONTROL_STOP, &SvrStatus);
DeleteService(hServiceDDK);
if (hServiceDDK)
{
CloseServiceHandle(hServiceDDK);
}
if (hServiceMgr)
{
CloseServiceHandle(hServiceMgr);
}
}
short Driver::CreateCallGate(CREATE_CALL_GATE* data)
{
HANDLE hDevice = CreateFileW(
DRIVER_LINK,
GENERIC_READ | GENERIC_WRITE,
0,
0,
OPEN_EXISTING,
FILE_ATTRIBUTE_NORMAL,
0);
if (hDevice == INVALID_HANDLE_VALUE)
{
printf("CreateFileW error %d\n", GetLastError());
return 0;
}
USHORT CallGateDescriptor = 0; // 调用门选择子
DWORD dwRetBytes; // 返回的字节数
if (!DeviceIoControl(
hDevice,
IOCTL_CREATE_CALL_GATE,
data,
sizeof(CREATE_CALL_GATE),
&CallGateDescriptor,
sizeof(USHORT),
&dwRetBytes,
NULL))
{
printf("DeviceIoControl error %d\n", GetLastError());
}
CloseHandle(hDevice);
if (dwRetBytes != 2 || CallGateDescriptor == 0)
{
printf("构造调用门失败.\n");
return 0;
}
return CallGateDescriptor;
}
char Driver::CreateIntGate()
{
HANDLE hDevice = CreateFileW(
DRIVER_LINK,
GENERIC_READ | GENERIC_WRITE,
0,
0,
OPEN_EXISTING,
FILE_ATTRIBUTE_NORMAL,
0);
if (hDevice == INVALID_HANDLE_VALUE)
{
printf("CreateFileW error %d\n", GetLastError());
return NULL;
}
char Ret = 0;
DWORD dwRetBytes; // 返回的字节数
if (!DeviceIoControl(
hDevice,
IOCTL_CREATE_INT_GATE,
NULL,
0,
&Ret,
sizeof(Ret),
&dwRetBytes,
NULL))
{
printf("DeviceIoControl error %d\n", GetLastError());
CloseHandle(hDevice);
return NULL;
}
CloseHandle(hDevice);
return Ret;
}
char* Driver::AllocMemory()
{
HANDLE hDevice = CreateFileW(
DRIVER_LINK,
GENERIC_READ | GENERIC_WRITE,
0,
0,
OPEN_EXISTING,
FILE_ATTRIBUTE_NORMAL,
0);
if (hDevice == INVALID_HANDLE_VALUE)
{
printf("CreateFileW error %d\n", GetLastError());
return NULL;
}
char* pRet = NULL;
DWORD dwRetBytes; // 返回的字节数
if (!DeviceIoControl(
hDevice,
IOCTL_AllOC_SHELLCODE_MEMORY,
NULL,
0,
&pRet,
sizeof(pRet),
&dwRetBytes,
NULL))
{
printf("DeviceIoControl error %d\n", GetLastError());
CloseHandle(hDevice);
return NULL;
}
CloseHandle(hDevice);
return pRet;
}
bool Driver::ChangeMemoryAttr(const void* data)
{
HANDLE hDevice = CreateFileW(
DRIVER_LINK,
GENERIC_READ | GENERIC_WRITE,
0,
0,
OPEN_EXISTING,
FILE_ATTRIBUTE_NORMAL,
0);
if (hDevice == INVALID_HANDLE_VALUE)
{
printf("CreateFileW error %d\n", GetLastError());
return false;
}
DWORD dwRetBytes; // 返回的字节数
if(!DeviceIoControl(
hDevice,
IOCTL_CHANGE_MEMORY_ATTR,
&data,
sizeof(data),
NULL,
0,
&dwRetBytes,
NULL))
{
printf("DeviceIoControl error %d\n", GetLastError());
CloseHandle(hDevice);
return false;
}
CloseHandle(hDevice);
return true;
}
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//driverMain.cpp
PDEVICE_OBJECT pDeviceObj = NULL; // 设备对象指针
PVOID pShellCodeBuffer = NULL;
SHORT idt_index = 0;
VOID DriverUnload(PDRIVER_OBJECT pDriver)
{
UNREFERENCED_PARAMETER(pDriver);
DIRVER_PRINT_DEBUG_STRING("DriverUnload\n");
ExFreePool(pShellCodeBuffer);
UNICODE_STRING SymbolicLinkName; // 符号链接名，3环用
RtlInitUnicodeString(&SymbolicLinkName, DRIVER_LINKD);
IoDeleteSymbolicLink(&SymbolicLinkName);
IoDeleteDevice(pDeviceObj);
}
typedef struct _LDR_DATA_TABLE_ENTRY
{
LIST_ENTRY InLoadOrderLinks;
LIST_ENTRY InMemoryOrderLinks;
LIST_ENTRY InInitializationOrderLinks;
PVOID DllBase;
PVOID EntryPoint;
LONG SizeOfImage;
UNICODE_STRING FullDllName;
UNICODE_STRING BaseDllName;
}LDR_DATA_TABLE_ENTRY, * PLDR_DATA_TABLE_ENTRY;
NTSTATUS OnCreateCallGate(char* data, ULONG inSize, ULONG_PTR* outSize)
{
CREATE_CALL_GATE arg;
RtlCopyMemory(&arg, data, inSize);
DIRVER_PRINT_DEBUG_STRING("OnCreateCallGate pFunc[0x%x], argc[%d]\n", arg.pFunc, arg.argc);
*outSize = 0;
char gdt[6];
_asm
{
sgdt gdt
}
PLONG lpgdt = *(PLONG*)(gdt + 2);
SHORT len = *(PSHORT)gdt;
DIRVER_PRINT_DEBUG_STRING("gdt addr[0x%x] limit[0x%x]\n", lpgdt, len);
if (NULL == lpgdt)
{
return -1;
}
for (SHORT i = 2; i < len; i += 2)
{
if (0 == (lpgdt[i + 1] & 0x8000))
{
LONG hData = (LONG)arg.pFunc & 0xffff0000;
hData |= 0xec00 | arg.argc;
LONG lData = 0x80000 | ((LONG)arg.pFunc & 0x0000ffff);
lpgdt[i] = lData;
lpgdt[i + 1] = hData;
SHORT selector = (i / 2) << 3;
DIRVER_PRINT_DEBUG_STRING("创建门 gdt[%d] selector[%d] %08x`%08x\n", i / 2, selector, hData, lData);
RtlCopyMemory(data, &selector, inSize);
*outSize = 2;
return STATUS_SUCCESS;
}
}
return -2;
}
void OnAddShellCodePage2()
{
ULONG p = (ULONG)pShellCodeBuffer & 0xfffff000;
ULONG PDPTI = p >> 30;
ULONG PDI = (p >> 21) & 0x1ff;
ULONG PTI = (p >> 12) & 0x1ff;
ULONG offset = p & 0xfff;
DIRVER_PRINT_DEBUG_STRING(
"p = 0x%08x\n"
"PDPTI = 0x%x\n"
"PDI = 0x%x\n"
"PTI = 0x%x\n"
"offset = 0x%x\n",
p, PDPTI, PDI, PTI, offset
);
//公式：
//pPDE = 0xc0600000 + (PDPTI * 4KB) + (PDI * 8)
//pPTE = 0xc0000000 + (PDPTI * 2MB) + (PDI * 4KB) + (PTI * 8)
//更高效的公式（MmIsAddressValid是这么干的）
//pPDE = 0xc0600000 + ((addr >> 18) & 0x3ff8)
//pPTE = 0xc0000000 + ((addr >> 9) & 0x7ffff8)
PULONG pPDE = (PULONG)(0xC0600000 + PDPTI * 0x1000 + PDI * 8);
DIRVER_PRINT_DEBUG_STRING("PDE: %08x`%08x\n", pPDE[1], pPDE[0]);
pPDE[1] = pPDE[1] & 0x7fffffff;//NX置0
pPDE[0] = pPDE[0] & 0xfffffffb;
pPDE[0] = pPDE[0] | 0x4;//us位置1
DIRVER_PRINT_DEBUG_STRING("PDE: %08x`%08x\n", pPDE[1], pPDE[0]);
if (0x80 == (pPDE[0] & 0x80))
{
DIRVER_PRINT_DEBUG_STRING("Large page\n");
}
else
{
PULONG pPTE = (PULONG)(0xc0000000 + PDPTI * 0x200000 + PDI * 0x1000 + PTI * 8);
DIRVER_PRINT_DEBUG_STRING("pPTE: %08x`%08x\n", pPTE[1], pPTE[0]);
pPTE[1] = pPTE[1] & 0x7fffffff;//NX置0
pPTE[0] = pPTE[0] & 0xfffffffb;
pPTE[0] = pPTE[0] | 0x4;//us位置1
DIRVER_PRINT_DEBUG_STRING("pPTE: %08x`%08x\n", pPTE[1], pPTE[0]);
}
}
void __declspec(naked)OnAddShellCodePage()
{
__asm
{
pushad;
pushfd;
push fs;
}
OnAddShellCodePage2();
__asm
{
pop fs;
popfd;
popad;
iretd;
}
}
NTSTATUS OnCreateIntGate(char* data, ULONG inSize, ULONG_PTR* outSize)
{
*outSize = 0;
if (0 != idt_index)
{
*outSize = 1;
RtlCopyMemory(data, &idt_index, *outSize);
return STATUS_SUCCESS;
}
char idt[6];
_asm
{
sidt idt
}
PLONG lpidt = *(PLONG*)(idt + 2);
SHORT len = *(PSHORT)idt;
DIRVER_PRINT_DEBUG_STRING("gdt addr[0x%x] limit[0x%x]\n", lpidt, len);
if (NULL == lpidt)
{
return -1;
}
LONG hData = (LONG)OnAddShellCodePage & 0xffff0000;
hData |= 0xee00;
LONG lData = 0x80000 | ((LONG)OnAddShellCodePage & 0x0000ffff);
lpidt[32 * 2] = lData;
lpidt[32 * 2 + 1] = hData;
idt_index = 32;
DIRVER_PRINT_DEBUG_STRING("创建中断门 index[%d] %08x`%08x\n", idt_index, hData, lData);
*outSize = 1;
RtlCopyMemory(data, &idt_index, *outSize);
return STATUS_SUCCESS;
}
NTSTATUS OnAllocShellCodeMemory(char* data, ULONG inSize, ULONG_PTR* outSize)
{
DIRVER_PRINT_DEBUG_STRING("OnAllocMemory\n");
*outSize = 0;
if (NULL == pShellCodeBuffer)
{
pShellCodeBuffer = ExAllocatePoolWithTag(NonPagedPool, 0x1000, 'ABCD');
if (NULL == pShellCodeBuffer)
{
DIRVER_PRINT_DEBUG_STRING("ExAllocatePoolWithTag error\n");
return -1;
}
RtlCopyMemory(pShellCodeBuffer, "1234deadbeef", 13);
}
*outSize = sizeof(pShellCodeBuffer);
RtlCopyMemory(data, &pShellCodeBuffer, *outSize);
DIRVER_PRINT_DEBUG_STRING("pbuffer：0x%08x data:%08x\n", pShellCodeBuffer, data);
return STATUS_SUCCESS;
}
NTSTATUS OnChangeMemoryAttr(char* data, ULONG inSize, ULONG_PTR* outSize)
{
*outSize = 0;
ULONG p = NULL;
RtlCopyMemory(&p, data, sizeof(p));
if (NULL == p)
{
DIRVER_PRINT_DEBUG_STRING("NULL == p\n");
return -1;
}
p &= 0xfffff000;
ULONG PDPTI = p >> 30;
ULONG PDI = (p >> 21) & 0x1ff;
ULONG PTI = (p >> 12) & 0x1ff;
ULONG offset = p & 0xfff;
DIRVER_PRINT_DEBUG_STRING(
"p = 0x%08x\n"
"PDPTI = 0x%x\n"
"PDI = 0x%x\n"
"PTI = 0x%x\n"
"offset = 0x%x\n",
p, PDPTI, PDI, PTI, offset
);
//公式：
//pPDE = 0xc0600000 + (PDPTI * 4KB) + (PDI * 8)
//pPTE = 0xc0000000 + (PDPTI * 2MB) + (PDI * 4KB) + (PTI * 8)
//更高效的公式（MmIsAddressValid是这么干的）
//pPDE = 0xc0600000 + ((addr >> 18) & 0x3ff8)
//pPTE = 0xc0000000 + ((addr >> 9) & 0x7ffff8)
PULONG pPDE = (PULONG)(0xC0600000 + PDPTI * 0x1000 + PDI * 8);
DIRVER_PRINT_DEBUG_STRING("PDE: %08x`%08x\n", pPDE[1], pPDE[0]);
pPDE[1] = pPDE[1] & 0x7fffffff;//NX置0
pPDE[0] = pPDE[0] & 0xfffffffb;
pPDE[0] = pPDE[0] | 0x6;//us,rw位置1
DIRVER_PRINT_DEBUG_STRING("PDE: %08x`%08x\n", pPDE[1], pPDE[0]);
if (0x80 == (pPDE[0] & 0x80))
{
DIRVER_PRINT_DEBUG_STRING("Large page\n");
}
else
{
PULONG pPTE = (PULONG)(0xc0000000 + PDPTI * 0x200000 + PDI * 0x1000 + PTI * 8);
DIRVER_PRINT_DEBUG_STRING("pPTE: %08x`%08x\n", pPTE[1], pPTE[0]);
pPTE[1] = pPTE[1] & 0x7fffffff;
pPTE[0] = pPTE[0] & 0xfffffffb;
pPTE[0] = pPTE[0] | 0x6;//us,rw位置1
DIRVER_PRINT_DEBUG_STRING("pPTE: %08x`%08x\n", pPTE[1], pPTE[0]);
}
return STATUS_SUCCESS;
}
NTSTATUS OnMessage(IN PDEVICE_OBJECT DeviceObject, IN PIRP Irp)
{
UNREFERENCED_PARAMETER(DeviceObject);
STATUS_SUCCESS;
PIO_STACK_LOCATION irpStack = IoGetCurrentIrpStackLocation(Irp);
if (IRP_MJ_DEVICE_CONTROL == irpStack->MajorFunction)
{
static struct
{
ULONG id;
NTSTATUS(*callback)(char* pData, ULONG lenth, ULONG_PTR*);
}CallBackMap[] =
{
{IOCTL_CREATE_CALL_GATE, OnCreateCallGate},
{IOCTL_AllOC_SHELLCODE_MEMORY, OnAllocShellCodeMemory},
{IOCTL_CHANGE_MEMORY_ATTR, OnChangeMemoryAttr},
{IOCTL_CREATE_INT_GATE, OnCreateIntGate},
};
for (int i = 0; i < sizeof(CallBackMap) / sizeof(CallBackMap[0]); ++i)
{
if (CallBackMap[i].id == irpStack->Parameters.DeviceIoControl.IoControlCode)
{
Irp->IoStatus.Status = CallBackMap[i].callback(
(char*)Irp->AssociatedIrp.SystemBuffer,
irpStack->Parameters.DeviceIoControl.InputBufferLength,
&Irp->IoStatus.Information);
break;
}
}
}
IoCompleteRequest(Irp, IO_NO_INCREMENT);
return STATUS_SUCCESS;
}
// IRP_MJ_CREATE 处理函数
NTSTATUS IrpCreateProc(PDEVICE_OBJECT pDevObj, PIRP pIrp)
{
//DbgPrint("应用层连接设备.\n");
// 返回状态如果不设置，Ring3返回值是失败
pIrp->IoStatus.Status = STATUS_SUCCESS;
pIrp->IoStatus.Information = 0;
IoCompleteRequest(pIrp, IO_NO_INCREMENT);
return STATUS_SUCCESS;
}
// IRP_MJ_CLOSE 处理函数
NTSTATUS IrpCloseProc(PDEVICE_OBJECT pDevObj, PIRP pIrp)
{
//DbgPrint("应用层断开连接设备.\n");
// 返回状态如果不设置，Ring3返回值是失败
pIrp->IoStatus.Status = STATUS_SUCCESS;
pIrp->IoStatus.Information = 0;
IoCompleteRequest(pIrp, IO_NO_INCREMENT);
return STATUS_SUCCESS;
}
extern"C"
NTSTATUS DriverEntry(PDRIVER_OBJECT pDriver, PUNICODE_STRING pRegPath)
{
UNREFERENCED_PARAMETER(pRegPath);
pDriver->DriverUnload = DriverUnload;
pDriver->MajorFunction[IRP_MJ_DEVICE_CONTROL] = OnMessage;
pDriver->MajorFunction[IRP_MJ_CREATE] = IrpCreateProc;
pDriver->MajorFunction[IRP_MJ_CLOSE] = IrpCloseProc;
DIRVER_PRINT_DEBUG_STRING("pDriver: 0x%08x\n", pDriver);
UNICODE_STRING DeviceName; // 设备名，0环用
RtlInitUnicodeString(&DeviceName, DEVICE_NAME);
auto status = IoCreateDevice(pDriver, 0, &DeviceName, FILE_DEVICE_UNKNOWN, FILE_DEVICE_SECURE_OPEN, FALSE, &pDeviceObj);
if (status != STATUS_SUCCESS)
{
IoDeleteDevice(pDeviceObj);
DIRVER_PRINT_DEBUG_STRING("创建设备失败 0x%08x.\n", status);
return status;
}
UNICODE_STRING SymbolicLinkName; // 符号链接名，3环用
RtlInitUnicodeString(&SymbolicLinkName, DRIVER_LINKD);
status = IoCreateSymbolicLink(&SymbolicLinkName, &DeviceName);
if (!NT_SUCCESS(status))
{
DIRVER_PRINT_DEBUG_STRING("创建符号失败 0x%08x.\n", status);
}
return STATUS_SUCCESS;
}
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