windows驱动保活的思路/apc demo_windows应用保活方法-优快云博客

本文链接：https://blog.youkuaiyun.com/pureman_mega/article/details/125716165

本文介绍了如何通过注册关机回调函数，使驱动在系统关机时检查自身服务和文件状态。同时展示了在用户模式和内核模式下使用Apc（异步过程调用）的示例代码，确保驱动在下次启动时能够正常运行。尽管这种方法可以在某些情况下确保驱动的启动，但在安全模式下仍可能被检测到。

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参考：某驱动云下发器

通过注册关机回调，使得驱动能够接收系统的关机时间，在这个时候检测自己的服务及文件是否正常。如下图：

*注册关机回调

*系统关机消息处理函数

注意：

当然还可以寻找更晚的时机来确保驱动能在下次开机能够启动。不过，这种还是会在比如，安全模式下被发现的。

*kernel shellcode

//apc demo

//user-mode

//
//ethread is the target execution environment,
//addr is the user-mode shellcode address
//
VOID UsermodeApc(PETHREAD ethread, PVOID address)
{
	PRKAPC apc = NULL;

	//check the apcs condition
	if (KeAreAllApcsDisabled() == FALSE&&
		address)
	{
		//we can use apcs
		apc = (PRKAPC)ExAllocatePool(NonPagedPool, sizeof(KAPC));
		if (apc)
		{
			//initialize apc structure
			//
			// for user mode apc
			// set RundownRoutine to NULL
			// ProcessorMode to UserMode
			// NormalRoutine to user-mdoe routine address
			//
			KeInitializeApc(
				apc,   //apc
				ethread,               //thread set the target thread obejct ,PsLookupThreadByThradId
				OriginalApcEnvironment,               //Enviroment
				KernelRoutine,               //KernelRoutine
				NULL,//RundownRoutine,               //RundownRoutine
				(PKNORMAL_ROUTINE)address,               //NormalRoutine
				UserMode,         //ProcessMode,specify under which mode the NormalRoutine will run
				NULL);              //NormalContext

			//insert apc into apc list
			DbgPrint("[%s]inserting user-mode apc!\n", __FUNCTION__);
			KeInsertQueueApc(
				apc,               //apc
			    NULL,                        //SystemArguemnt1,which can be used in KernelRoutine and NormalRoutine
				NULL,                           //SystemArgument2,which can be used in KernelRoutine and NormalRoutine
				IO_NO_INCREMENT                 //Increment
			);
		}
	}
}

//kernel mode

//using KernelMode apc

void NTAPI KernelRoutine(PKAPC apc,
	PKNORMAL_ROUTINE* NormalRoutine,
	PVOID* NormalContext,
	PVOID* SystemArgument1, 
	PVOID* SystemArgument2)
{
	UNREFERENCED_PARAMETER(NormalRoutine);
	UNREFERENCED_PARAMETER(NormalContext);
	UNREFERENCED_PARAMETER(SystemArgument1);
	UNREFERENCED_PARAMETER(SystemArgument2);

	ExFreePool(apc);
}

void NTAPI RundownRoutine(PRKAPC apc)
{
	ExFreePool(apc);
}

void NTAPI NormalRoutine(PVOID NormalContext,
	PVOID SystemArgument1,
	PVOID SystemArgument2)
{
	UNREFERENCED_PARAMETER(NormalContext);
	UNREFERENCED_PARAMETER(SystemArgument1);
	UNREFERENCED_PARAMETER(SystemArgument2);

	//to do something
	DbgPrint("%s", (char*)SystemArgument1);
}

VOID TestKernelApc()
{
	PRKAPC apc =NULL;
	CHAR RawData[0x100] = "in apc NormalRoutine";

	//check the apcs condition
	if (KeAreAllApcsDisabled()==FALSE)
	{
		//we can use apcs
		apc = (PRKAPC)ExAllocatePool(NonPagedPool, sizeof(KAPC));
		if (apc)
		{
			//initialize apc structure
			//
			// for user mode apc
			// set RundownRoutine to NULL
			// ProcessorMode to UserMode
			// NormalRoutine to user-mdoe routine address
			//
			KeInitializeApc(apc,   //apc
				PsGetCurrentThread(),               //thread set the target thread obejct ,PsLookupThreadByThradId
				OriginalApcEnvironment,               //Enviroment
				KernelRoutine,               //KernelRoutine
				RundownRoutine,               //RundownRoutine
				NormalRoutine,               //NormalRoutine
				KernelMode,         //ProcessMode,specify under which mode the NormalRoutine will run
				NULL);              //NormalContext

			//insert apc into apc list
			DbgPrint("[%s]inserting apc!\n",__FUNCTION__);
			KeInsertQueueApc(apc,               //apc
				RawData,                        //SystemArguemnt1,which can be used in KernelRoutine and NormalRoutine
				NULL,                           //SystemArgument2,which can be used in KernelRoutine and NormalRoutine
				IO_NO_INCREMENT                 //Increment
			);
		}
	}
	
}