EPROCESS进程断链

本身今天说写《Windows驱动开发技术详解》第六章的笔记，但是发现第六章无非是字符串、文件、注册表，其实没有必要抄书，之前写了写笔记，也能够尝试写一点小函数练练手的，就想自己写点小例子记作笔记也是OK的。今天用Windbg的dt命令查看字符串结构的时候，顺带查询了EPROCESS结构，PEB，TEB，_RTL_USER_PROCESS_PARAMETERS这些结构。

kd> dt _EPROCESSntdll!_EPROCESS   +0x000 Pcb              : _KPROCESS   +0x06c ProcessLock      : _EX_PUSH_LOCK   +0x070 CreateTime       : _LARGE_INTEGER   +0x078 ExitTime         : _LARGE_INTEGER   +0x080 RundownProtect   : _EX_RUNDOWN_REF   +0x084 UniqueProcessId  : Ptr32 Void   +0x088 ActiveProcessLinks : _LIST_ENTRY   +0x090 QuotaUsage       : [3] Uint4B   +0x09c QuotaPeak        : [3] Uint4B   +0x0a8 CommitCharge     : Uint4B   +0x0ac PeakVirtualSize  : Uint4B   +0x0b0 VirtualSize      : Uint4B   +0x0b4 SessionProcessLinks : _LIST_ENTRY   +0x0bc DebugPort        : Ptr32 Void   +0x0c0 ExceptionPort    : Ptr32 Void   +0x0c4 ObjectTable      : Ptr32 _HANDLE_TABLE   +0x0c8 Token            : _EX_FAST_REF   +0x0cc WorkingSetLock   : _FAST_MUTEX   +0x0ec WorkingSetPage   : Uint4B   +0x0f0 AddressCreationLock : _FAST_MUTEX   +0x110 HyperSpaceLock   : Uint4B   +0x114 ForkInProgress   : Ptr32 _ETHREAD   +0x118 HardwareTrigger  : Uint4B   +0x11c VadRoot          : Ptr32 Void   +0x120 VadHint          : Ptr32 Void   +0x124 CloneRoot        : Ptr32 Void   +0x128 NumberOfPrivatePages : Uint4B   +0x12c NumberOfLockedPages : Uint4B   +0x130 Win32Process     : Ptr32 Void   +0x134 Job              : Ptr32 _EJOB   +0x138 SectionObject    : Ptr32 Void   +0x13c SectionBaseAddress : Ptr32 Void   +0x140 QuotaBlock       : Ptr32 _EPROCESS_QUOTA_BLOCK   +0x144 WorkingSetWatch  : Ptr32 _PAGEFAULT_HISTORY   +0x148 Win32WindowStation : Ptr32 Void   +0x14c InheritedFromUniqueProcessId : Ptr32 Void   +0x150 LdtInformation   : Ptr32 Void   +0x154 VadFreeHint      : Ptr32 Void   +0x158 VdmObjects       : Ptr32 Void   +0x15c DeviceMap        : Ptr32 Void   +0x160 PhysicalVadList  : _LIST_ENTRY   +0x168 PageDirectoryPte : _HARDWARE_PTE_X86   +0x168 Filler           : Uint8B   +0x170 Session          : Ptr32 Void   +0x174 ImageFileName    : [16] UChar   +0x184 JobLinks         : _LIST_ENTRY   +0x18c LockedPagesList  : Ptr32 Void   +0x190 ThreadListHead   : _LIST_ENTRY   +0x198 SecurityPort     : Ptr32 Void   +0x19c PaeTop           : Ptr32 Void   +0x1a0 ActiveThreads    : Uint4B   +0x1a4 GrantedAccess    : Uint4B   +0x1a8 DefaultHardErrorProcessing : Uint4B   +0x1ac LastThreadExitStatus : Int4B   +0x1b0 Peb              : Ptr32 _PEB   +0x1b4 PrefetchTrace    : _EX_FAST_REF   +0x1b8 ReadOperationCount : _LARGE_INTEGER   +0x1c0 WriteOperationCount : _LARGE_INTEGER   +0x1c8 OtherOperationCount : _LARGE_INTEGER   +0x1d0 ReadTransferCount : _LARGE_INTEGER   +0x1d8 WriteTransferCount : _LARGE_INTEGER   +0x1e0 OtherTransferCount : _LARGE_INTEGER   +0x1e8 CommitChargeLimit : Uint4B   +0x1ec CommitChargePeak : Uint4B   +0x1f0 AweInfo          : Ptr32 Void   +0x1f4 SeAuditProcessCreationInfo : _SE_AUDIT_PROCESS_CREATION_INFO   +0x1f8 Vm               : _MMSUPPORT   +0x238 LastFaultCount   : Uint4B   +0x23c ModifiedPageCount : Uint4B   +0x240 NumberOfVads     : Uint4B   +0x244 JobStatus        : Uint4B   +0x248 Flags            : Uint4B   +0x248 CreateReported   : Pos 0, 1 Bit   +0x248 NoDebugInherit   : Pos 1, 1 Bit   +0x248 ProcessExiting   : Pos 2, 1 Bit   +0x248 ProcessDelete    : Pos 3, 1 Bit   +0x248 Wow64SplitPages  : Pos 4, 1 Bit   +0x248 VmDeleted        : Pos 5, 1 Bit   +0x248 OutswapEnabled   : Pos 6, 1 Bit   +0x248 Outswapped       : Pos 7, 1 Bit   +0x248 ForkFailed       : Pos 8, 1 Bit   +0x248 HasPhysicalVad   : Pos 9, 1 Bit   +0x248 AddressSpaceInitialized : Pos 10, 2 Bits   +0x248 SetTimerResolution : Pos 12, 1 Bit   +0x248 BreakOnTermination : Pos 13, 1 Bit   +0x248 SessionCreationUnderway : Pos 14, 1 Bit   +0x248 WriteWatch       : Pos 15, 1 Bit   +0x248 ProcessInSession : Pos 16, 1 Bit   +0x248 OverrideAddressSpace : Pos 17, 1 Bit   +0x248 HasAddressSpace  : Pos 18, 1 Bit   +0x248 LaunchPrefetched : Pos 19, 1 Bit   +0x248 InjectInpageErrors : Pos 20, 1 Bit   +0x248 VmTopDown        : Pos 21, 1 Bit   +0x248 Unused3          : Pos 22, 1 Bit   +0x248 Unused4          : Pos 23, 1 Bit   +0x248 VdmAllowed       : Pos 24, 1 Bit   +0x248 Unused           : Pos 25, 5 Bits   +0x248 Unused1          : Pos 30, 1 Bit   +0x248 Unused2          : Pos 31, 1 Bit   +0x24c ExitStatus       : Int4B   +0x250 NextPageColor    : Uint2B   +0x252 SubSystemMinorVersion : UChar   +0x253 SubSystemMajorVersion : UChar   +0x252 SubSystemVersion : Uint2B   +0x254 PriorityClass    : UChar   +0x255 WorkingSetAcquiredUnsafe : UChar   +0x258 Cookie           : Uint4B

其中在EPROCESS结构的0x88偏移位置，有一个_LIST_ENTRY，ActiveProcessLinks，根据前人的文章，这个链表，将各个进程的EPROCESS连接起来。

之前也学习过链表的结构，这次索性自己尝试，将其中某个进程的EPROCESS取出，达到进程隐藏的目的。

#include <ntddk.h>NTKERNELAPI NTSTATUS PsLookupProcessByProcessId(HANDLE ProcessId, PEPROCESS *Process);NTKERNELAPI VOID KeAttachProcess(PEPROCESS Process);NTKERNELAPI VOID KeDetachProcess(VOID);NTSTATUS HideProcess(){NTSTATUS ns;PEPROCESS Process;ULONG PEB = 0;PLIST_ENTRY ProcessLink = NULL;ns = PsLookupProcessByProcessId((HANDLE)1504, &Process);if (!NT_SUCCESS(ns)) {return ns;}ObDereferenceObject(Process);KeAttachProcess(Process);PEB = *(ULONG*)((ULONG)Process+0x1B0);KdPrint(("PEB BaseAddress:%08lX\n", PEB));ProcessLink= (PLIST_ENTRY)((ULONG)Process+0x88);__try{ProcessLink->Flink->Blink = ProcessLink->Blink;ProcessLink->Blink->Flink = ProcessLink->Flink;}__except(EXCEPTION_EXECUTE_HANDLER){KdPrint(("GetExceptionCode:0x8lX%\n", GetExceptionCode()));}KeDetachProcess();return ns;}VOID DriverUnload(PDRIVER_OBJECT pDriverObject){KdPrint(("DriverUnload"));}NTSTATUS DriverEntry(PDRIVER_OBJECT pDriverObject, PUNICODE_STRING pRegPath){KdPrint(("DriverEntey\n"));pDriverObject->DriverUnload = DriverUnload;HideProcess();return STATUS_SUCCESS;}

驱动加载和卸载时没有出现蓝屏，这点令人欣慰，这些天想自己尝试写点小东西玩玩，结果发现，各种蓝屏，真是各种无奈啊。加载后成功找到相关进程的地址。

由于explorer.exe的进程已经被断链，所以通过任务管理器无法查看到具体的进程信息。

但是使用ARK工具都是可以看到的，并且被工具用红色标注。嗯，这个小驱动算是完成了，但是相关结构有N多可以挖掘的东西，这个后面慢慢研究了。