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# 前言 每个进程都会有自己独立的4GB的内存空间 # 本质 当进程中的线程执行代码时，能访问的内容，是由进程决定的 任何进程，在0环都会有一个结构体，EPROCESS `OpenProcess()`...
0x00 前言 ======= 每个进程都会有自己独立的4GB的内存空间 0x01 本质 ======= 当进程中的线程执行代码时，能访问的内容，是由进程决定的 任何进程，在0环都会有一个结构体，EPROCESS `OpenProcess()`函数的本质：是拿到0环结构体`EPROCESS`的句柄 0x02 配置符号路径 =========== 使用Windbg，正确配置符号路径 参考：<https://docs.microsoft.com/zh-cn/windows/win32/dxtecharts/debugging-with-symbols?redirectedfrom=MSDN> path变量 ------ Windbg访问符号须要两个文件(SYMSRV.DLL 和 SYMSTORE.EXE) 因此 添加上面这两个文件存在的目录 到path环境变量 我使用的是微软商店安装的Windbg Preview，它的默认路径 ```php C:\Program Files (x86)\Windows Kits\10\Debuggers\x64 ``` `_NT_SYMBOL_PATH`变量 ------------------- 在创建一个变量 ```php 变量名:_NT_SYMBOL_PATH 变量值:SRVc:\localsymbolshttp://msdl.microsoft.com/download/symbols ```  0x03 进程结构体(EPROCESS) ==================== 整体结构 ---- 采用附加进程的方式去Windbg 打开notepad.exe，在Windbg中 ```php File -> Attach to a Process -> notepad.exe ```   查看EPROCESS结构体 ```php dt nt!_eprocess ``` ```php 0:010> dt nt!_eprocess ntdll!_EPROCESS +0x000 Pcb : _KPROCESS +0x438 ProcessLock : _EX_PUSH_LOCK +0x440 UniqueProcessId : Ptr64 Void +0x448 ActiveProcessLinks : _LIST_ENTRY +0x458 RundownProtect : _EX_RUNDOWN_REF +0x460 Flags2 : Uint4B +0x460 JobNotReallyActive : Pos 0, 1 Bit +0x460 AccountingFolded : Pos 1, 1 Bit +0x460 NewProcessReported : Pos 2, 1 Bit +0x460 ExitProcessReported : Pos 3, 1 Bit +0x460 ReportCommitChanges : Pos 4, 1 Bit +0x460 LastReportMemory : Pos 5, 1 Bit +0x460 ForceWakeCharge : Pos 6, 1 Bit +0x460 CrossSessionCreate : Pos 7, 1 Bit +0x460 NeedsHandleRundown : Pos 8, 1 Bit +0x460 RefTraceEnabled : Pos 9, 1 Bit +0x460 PicoCreated : Pos 10, 1 Bit +0x460 EmptyJobEvaluated : Pos 11, 1 Bit +0x460 DefaultPagePriority : Pos 12, 3 Bits +0x460 PrimaryTokenFrozen : Pos 15, 1 Bit +0x460 ProcessVerifierTarget : Pos 16, 1 Bit +0x460 RestrictSetThreadContext : Pos 17, 1 Bit +0x460 AffinityPermanent : Pos 18, 1 Bit +0x460 AffinityUpdateEnable : Pos 19, 1 Bit +0x460 PropagateNode : Pos 20, 1 Bit +0x460 ExplicitAffinity : Pos 21, 1 Bit +0x460 ProcessExecutionState : Pos 22, 2 Bits +0x460 EnableReadVmLogging : Pos 24, 1 Bit +0x460 EnableWriteVmLogging : Pos 25, 1 Bit +0x460 FatalAccessTerminationRequested : Pos 26, 1 Bit +0x460 DisableSystemAllowedCpuSet : Pos 27, 1 Bit +0x460 ProcessStateChangeRequest : Pos 28, 2 Bits +0x460 ProcessStateChangeInProgress : Pos 30, 1 Bit +0x460 InPrivate : Pos 31, 1 Bit +0x464 Flags : Uint4B +0x464 CreateReported : Pos 0, 1 Bit +0x464 NoDebugInherit : Pos 1, 1 Bit +0x464 ProcessExiting : Pos 2, 1 Bit +0x464 ProcessDelete : Pos 3, 1 Bit +0x464 ManageExecutableMemoryWrites : Pos 4, 1 Bit +0x464 VmDeleted : Pos 5, 1 Bit +0x464 OutswapEnabled : Pos 6, 1 Bit +0x464 Outswapped : Pos 7, 1 Bit +0x464 FailFastOnCommitFail : Pos 8, 1 Bit +0x464 Wow64VaSpace4Gb : Pos 9, 1 Bit +0x464 AddressSpaceInitialized : Pos 10, 2 Bits +0x464 SetTimerResolution : Pos 12, 1 Bit +0x464 BreakOnTermination : Pos 13, 1 Bit +0x464 DeprioritizeViews : Pos 14, 1 Bit +0x464 WriteWatch : Pos 15, 1 Bit +0x464 ProcessInSession : Pos 16, 1 Bit +0x464 OverrideAddressSpace : Pos 17, 1 Bit +0x464 HasAddressSpace : Pos 18, 1 Bit +0x464 LaunchPrefetched : Pos 19, 1 Bit +0x464 Background : Pos 20, 1 Bit +0x464 VmTopDown : Pos 21, 1 Bit +0x464 ImageNotifyDone : Pos 22, 1 Bit +0x464 PdeUpdateNeeded : Pos 23, 1 Bit +0x464 VdmAllowed : Pos 24, 1 Bit +0x464 ProcessRundown : Pos 25, 1 Bit +0x464 ProcessInserted : Pos 26, 1 Bit +0x464 DefaultIoPriority : Pos 27, 3 Bits +0x464 ProcessSelfDelete : Pos 30, 1 Bit +0x464 SetTimerResolutionLink : Pos 31, 1 Bit +0x468 CreateTime : _LARGE_INTEGER +0x470 ProcessQuotaUsage : [2] Uint8B +0x480 ProcessQuotaPeak : [2] Uint8B +0x490 PeakVirtualSize : Uint8B +0x498 VirtualSize : Uint8B +0x4a0 SessionProcessLinks : _LIST_ENTRY +0x4b0 ExceptionPortData : Ptr64 Void +0x4b0 ExceptionPortValue : Uint8B +0x4b0 ExceptionPortState : Pos 0, 3 Bits +0x4b8 Token : _EX_FAST_REF +0x4c0 MmReserved : Uint8B +0x4c8 AddressCreationLock : _EX_PUSH_LOCK +0x4d0 PageTableCommitmentLock : _EX_PUSH_LOCK +0x4d8 RotateInProgress : Ptr64 _ETHREAD +0x4e0 ForkInProgress : Ptr64 _ETHREAD +0x4e8 CommitChargeJob : Ptr64 _EJOB +0x4f0 CloneRoot : _RTL_AVL_TREE +0x4f8 NumberOfPrivatePages : Uint8B +0x500 NumberOfLockedPages : Uint8B +0x508 Win32Process : Ptr64 Void +0x510 Job : Ptr64 _EJOB +0x518 SectionObject : Ptr64 Void +0x520 SectionBaseAddress : Ptr64 Void +0x528 Cookie : Uint4B +0x530 WorkingSetWatch : Ptr64 _PAGEFAULT_HISTORY +0x538 Win32WindowStation : Ptr64 Void +0x540 InheritedFromUniqueProcessId : Ptr64 Void +0x548 OwnerProcessId : Uint8B +0x550 Peb : Ptr64 _PEB +0x558 Session : Ptr64 _MM_SESSION_SPACE +0x560 Spare1 : Ptr64 Void +0x568 QuotaBlock : Ptr64 _EPROCESS_QUOTA_BLOCK +0x570 ObjectTable : Ptr64 _HANDLE_TABLE +0x578 DebugPort : Ptr64 Void +0x580 WoW64Process : Ptr64 _EWOW64PROCESS +0x588 DeviceMap : Ptr64 Void +0x590 EtwDataSource : Ptr64 Void +0x598 PageDirectoryPte : Uint8B +0x5a0 ImageFilePointer : Ptr64 _FILE_OBJECT +0x5a8 ImageFileName : [15] UChar +0x5b7 PriorityClass : UChar +0x5b8 SecurityPort : Ptr64 Void +0x5c0 SeAuditProcessCreationInfo : _SE_AUDIT_PROCESS_CREATION_INFO +0x5c8 JobLinks : _LIST_ENTRY +0x5d8 HighestUserAddress : Ptr64 Void +0x5e0 ThreadListHead : _LIST_ENTRY +0x5f0 ActiveThreads : Uint4B +0x5f4 ImagePathHash : Uint4B +0x5f8 DefaultHardErrorProcessing : Uint4B +0x5fc LastThreadExitStatus : Int4B +0x600 PrefetchTrace : _EX_FAST_REF +0x608 LockedPagesList : Ptr64 Void +0x610 ReadOperationCount : _LARGE_INTEGER +0x618 WriteOperationCount : _LARGE_INTEGER +0x620 OtherOperationCount : _LARGE_INTEGER +0x628 ReadTransferCount : _LARGE_INTEGER +0x630 WriteTransferCount : _LARGE_INTEGER +0x638 OtherTransferCount : _LARGE_INTEGER +0x640 CommitChargeLimit : Uint8B +0x648 CommitCharge : Uint8B +0x650 CommitChargePeak : Uint8B +0x680 Vm : _MMSUPPORT_FULL +0x7c0 MmProcessLinks : _LIST_ENTRY +0x7d0 ModifiedPageCount : Uint4B +0x7d4 ExitStatus : Int4B +0x7d8 VadRoot : _RTL_AVL_TREE +0x7e0 VadHint : Ptr64 Void +0x7e8 VadCount : Uint8B +0x7f0 VadPhysicalPages : Uint8B +0x7f8 VadPhysicalPagesLimit : Uint8B +0x800 AlpcContext : _ALPC_PROCESS_CONTEXT +0x820 TimerResolutionLink : _LIST_ENTRY +0x830 TimerResolutionStackRecord : Ptr64 _PO_DIAG_STACK_RECORD +0x838 RequestedTimerResolution : Uint4B +0x83c SmallestTimerResolution : Uint4B +0x840 ExitTime : _LARGE_INTEGER +0x848 InvertedFunctionTable : Ptr64 _INVERTED_FUNCTION_TABLE +0x850 InvertedFunctionTableLock : _EX_PUSH_LOCK +0x858 ActiveThreadsHighWatermark : Uint4B +0x85c LargePrivateVadCount : Uint4B +0x860 ThreadListLock : _EX_PUSH_LOCK +0x868 WnfContext : Ptr64 Void +0x870 ServerSilo : Ptr64 _EJOB +0x878 SignatureLevel : UChar +0x879 SectionSignatureLevel : UChar +0x87a Protection : _PS_PROTECTION +0x87b HangCount : Pos 0, 3 Bits +0x87b GhostCount : Pos 3, 3 Bits +0x87b PrefilterException : Pos 6, 1 Bit +0x87c Flags3 : Uint4B +0x87c Minimal : Pos 0, 1 Bit +0x87c ReplacingPageRoot : Pos 1, 1 Bit +0x87c Crashed : Pos 2, 1 Bit +0x87c JobVadsAreTracked : Pos 3, 1 Bit +0x87c VadTrackingDisabled : Pos 4, 1 Bit +0x87c AuxiliaryProcess : Pos 5, 1 Bit +0x87c SubsystemProcess : Pos 6, 1 Bit +0x87c IndirectCpuSets : Pos 7, 1 Bit +0x87c RelinquishedCommit : Pos 8, 1 Bit +0x87c HighGraphicsPriority : Pos 9, 1 Bit +0x87c CommitFailLogged : Pos 10, 1 Bit +0x87c ReserveFailLogged : Pos 11, 1 Bit +0x87c SystemProcess : Pos 12, 1 Bit +0x87c HideImageBaseAddresses : Pos 13, 1 Bit +0x87c AddressPolicyFrozen : Pos 14, 1 Bit +0x87c ProcessFirstResume : Pos 15, 1 Bit +0x87c ForegroundExternal : Pos 16, 1 Bit +0x87c ForegroundSystem : Pos 17, 1 Bit +0x87c HighMemoryPriority : Pos 18, 1 Bit +0x87c EnableProcessSuspendResumeLogging : Pos 19, 1 Bit +0x87c EnableThreadSuspendResumeLogging : Pos 20, 1 Bit +0x87c SecurityDomainChanged : Pos 21, 1 Bit +0x87c SecurityFreezeComplete : Pos 22, 1 Bit +0x87c VmProcessorHost : Pos 23, 1 Bit +0x87c VmProcessorHostTransition : Pos 24, 1 Bit +0x87c AltSyscall : Pos 25, 1 Bit +0x87c TimerResolutionIgnore : Pos 26, 1 Bit +0x87c DisallowUserTerminate : Pos 27, 1 Bit +0x880 DeviceAsid : Int4B +0x888 SvmData : Ptr64 Void +0x890 SvmProcessLock : _EX_PUSH_LOCK +0x898 SvmLock : Uint8B +0x8a0 SvmProcessDeviceListHead : _LIST_ENTRY +0x8b0 LastFreezeInterruptTime : Uint8B +0x8b8 DiskCounters : Ptr64 _PROCESS_DISK_COUNTERS +0x8c0 PicoContext : Ptr64 Void +0x8c8 EnclaveTable : Ptr64 Void +0x8d0 EnclaveNumber : Uint8B +0x8d8 EnclaveLock : _EX_PUSH_LOCK +0x8e0 HighPriorityFaultsAllowed : Uint4B +0x8e8 EnergyContext : Ptr64 _PO_PROCESS_ENERGY_CONTEXT +0x8f0 VmContext : Ptr64 Void +0x8f8 SequenceNumber : Uint8B +0x900 CreateInterruptTime : Uint8B +0x908 CreateUnbiasedInterruptTime : Uint8B +0x910 TotalUnbiasedFrozenTime : Uint8B +0x918 LastAppStateUpdateTime : Uint8B +0x920 LastAppStateUptime : Pos 0, 61 Bits +0x920 LastAppState : Pos 61, 3 Bits +0x928 SharedCommitCharge : Uint8B +0x930 SharedCommitLock : _EX_PUSH_LOCK +0x938 SharedCommitLinks : _LIST_ENTRY +0x948 AllowedCpuSets : Uint8B +0x950 DefaultCpuSets : Uint8B +0x948 AllowedCpuSetsIndirect : Ptr64 Uint8B +0x950 DefaultCpuSetsIndirect : Ptr64 Uint8B +0x958 DiskIoAttribution : Ptr64 Void +0x960 DxgProcess : Ptr64 Void +0x968 Win32KFilterSet : Uint4B +0x970 ProcessTimerDelay : _PS_INTERLOCKED_TIMER_DELAY_VALUES +0x978 KTimerSets : Uint4B +0x97c KTimer2Sets : Uint4B +0x980 ThreadTimerSets : Uint4B +0x988 VirtualTimerListLock : Uint8B +0x990 VirtualTimerListHead : _LIST_ENTRY +0x9a0 WakeChannel : _WNF_STATE_NAME +0x9a0 WakeInfo : _PS_PROCESS_WAKE_INFORMATION +0x9d0 MitigationFlags : Uint4B +0x9d0 MitigationFlagsValues : +0x9d4 MitigationFlags2 : Uint4B +0x9d4 MitigationFlags2Values : +0x9d8 PartitionObject : Ptr64 Void +0x9e0 SecurityDomain : Uint8B +0x9e8 ParentSecurityDomain : Uint8B +0x9f0 CoverageSamplerContext : Ptr64 Void +0x9f8 MmHotPatchContext : Ptr64 Void +0xa00 DynamicEHContinuationTargetsTree : _RTL_AVL_TREE +0xa08 DynamicEHContinuationTargetsLock : _EX_PUSH_LOCK +0xa10 DynamicEnforcedCetCompatibleRanges : _PS_DYNAMIC_ENFORCED_ADDRESS_RANGES +0xa20 DisabledComponentFlags : Uint4B +0xa28 PathRedirectionHashes : Ptr64 Uint4B ```  KPROCESS(主要成员) -------------- 它是进程结构体EPROCESS的主要成员，它是一个结构体，进一步查看 ```php 0:010> dt nt!_KPROCESS ntdll!_KPROCESS +0x000 Header : _DISPATCHER_HEADER +0x018 ProfileListHead : _LIST_ENTRY +0x028 DirectoryTableBase : Uint8B +0x030 ThreadListHead : _LIST_ENTRY +0x040 ProcessLock : Uint4B +0x044 ProcessTimerDelay : Uint4B +0x048 DeepFreezeStartTime : Uint8B +0x050 Affinity : _KAFFINITY_EX +0x0f8 AffinityPadding : [12] Uint8B +0x158 ReadyListHead : _LIST_ENTRY +0x168 SwapListEntry : _SINGLE_LIST_ENTRY +0x170 ActiveProcessors : _KAFFINITY_EX +0x218 ActiveProcessorsPadding : [12] Uint8B +0x278 AutoAlignment : Pos 0, 1 Bit +0x278 DisableBoost : Pos 1, 1 Bit +0x278 DisableQuantum : Pos 2, 1 Bit +0x278 DeepFreeze : Pos 3, 1 Bit +0x278 TimerVirtualization : Pos 4, 1 Bit +0x278 CheckStackExtents : Pos 5, 1 Bit +0x278 CacheIsolationEnabled : Pos 6, 1 Bit +0x278 PpmPolicy : Pos 7, 3 Bits +0x278 VaSpaceDeleted : Pos 10, 1 Bit +0x278 ReservedFlags : Pos 11, 21 Bits +0x278 ProcessFlags : Int4B +0x27c ActiveGroupsMask : Uint4B +0x280 BasePriority : Char +0x281 QuantumReset : Char +0x282 Visited : Char +0x283 Flags : _KEXECUTE_OPTIONS +0x284 ThreadSeed : [20] Uint2B +0x2ac ThreadSeedPadding : [12] Uint2B +0x2c4 IdealProcessor : [20] Uint2B +0x2ec IdealProcessorPadding : [12] Uint2B +0x304 IdealNode : [20] Uint2B +0x32c IdealNodePadding : [12] Uint2B +0x344 IdealGlobalNode : Uint2B +0x346 Spare1 : Uint2B +0x348 StackCount : _KSTACK_COUNT +0x350 ProcessListEntry : _LIST_ENTRY +0x360 CycleTime : Uint8B +0x368 ContextSwitches : Uint8B +0x370 SchedulingGroup : Ptr64 _KSCHEDULING_GROUP +0x378 FreezeCount : Uint4B +0x37c KernelTime : Uint4B +0x380 UserTime : Uint4B +0x384 ReadyTime : Uint4B +0x388 UserDirectoryTableBase : Uint8B +0x390 AddressPolicy : UChar +0x391 Spare2 : [71] UChar +0x3d8 InstrumentationCallback : Ptr64 Void +0x3e0 SecureState : +0x3e8 KernelWaitTime : Uint8B +0x3f0 UserWaitTime : Uint8B +0x3f8 EndPadding : [8] Uint8B ```  继续看参数 继续看参数 1、 ```php +0x000 Header : _DISPATCHER_HEADER ``` 只要我们的结构体中包含`_DISPATCHER_HEADER`，就可以成为被等待对象 2、 ```php +0x028 DirectoryTableBase : Uint8B ``` 它是页目录表的基址，也就是cr3 1个内核，只有一个cr3，但是可以跑10个进程： 10个进程，每个进程保存自己的进程结构体`EPROCESS` 每个进程都保存着自己的cr3：`+0x018 DirectoryTableBase : [2] Uint4B` A进程执行的时候，就把它A进程的cr3放到内核中的cr3寄存器中 B进程执行的时候，就把它B进程的cr3放到内核中的cr3寄存器中 A进程：x、y、z三个线程，三个线程使用同一个cr3，就是进程A的cr3 B进程：m、n两个线程，两个线程使用同一个cr3，就是进程B的cr3 线程切换，cr3可能并不会切换，比如x切换到y，因为他们都使用进程A的cr3 进程切换，比如x切换到m，x使用进程A的cr3，m使用进程B的cr3，所以需要切换cr3 两个进程之间的线程切换，cr3才会切换 3、 ```php +0x37c KernelTime : Uint4B +0x380 UserTime : Uint4B ``` 统计信息 记录了一个进程在内核模式/用户模式下所花的时间 4、 ```php +0x050 Affinity : _KAFFINITY_EX ``` 规定进程里面的所有线程能在哪个CPU上跑 看哪一位为1，倒着走，分别是0号CPU、1号CPU、2号CPU、3号CPU... 如果值为1，转换成二进制`00000001`，那这个进程的所以线程只能在0号CPU上跑(00000001)--->看哪一位为1 如果值为3，转换成二进制`000000011`，那这个进程的所以线程能在0、1号CPU上跑(000000011) 如果值为4，转换成二进制`000000100`，那这个进程的所以线程能在2号CPU上跑(000000100) 如果值为5，转换成二进制`000000101`，那这个进程的所以线程能在0，2号CPU上跑(000000101) 4个字节共32位 所以最多32核 Windows64位 就64核 如果只有一个CPU 把这个设置为4 那么这个进程就死了 5、 ```php +0x280 BasePriority : Char ``` 基础优先级或最低优先级 该进程中的所有线程最起码的优先级. 其他成员 ---- 1、 ```php +0x440 UniqueProcessId : Ptr64 Void ``` 进程的编号 任务管理器中的PID 当我们把它改成0使用时，程序依然可以跑，但是某些API可能不能用了 2、 ```php +0x448 ActiveProcessLinks : _LIST_ENTRY ``` 双向链表 所有的活动进程都连接在一起，构成了一个链表`PsActiveProcessHead`指向全局链表头 它可以看到当前操作系统中，所有正在运行的进程 3、 ```php +0x468 CreateTime : _LARGE_INTEGER ``` 进程的创建时间 4、 ```php +0x840 ExitTime : _LARGE_INTEGER ``` 进程的退出时间 5、 ```php +0x470 ProcessQuotaUsage : [2] Uint8B +0x480 ProcessQuotaPeak : [2] Uint8B ``` 物理页相关的统计信息 6、 ```php +0x4b0 ExceptionPortData : Ptr64 Void +0x4b0 ExceptionPortValue : Uint8B +0x4b0 ExceptionPortState : Pos 0, 3 Bits +0x578 DebugPort : Ptr64 Void ``` 调试相关 7、 ```php +0x490 PeakVirtualSize : Uint8B +0x498 VirtualSize : Uint8B +0x648 CommitCharge : Uint8B ``` 虚拟内存相关的统计信息 8、 ```php +0x570 ObjectTable : Ptr64 _HANDLE_TABLE ``` 句柄表 9、 ```php +0x5a8 ImageFileName : [15] UChar ``` 进程镜像文件名 最多16个字节 10、 ```php +0x5f0 ActiveThreads : Uint4B ``` 活动线程的数量 11、 ```php +0x7d8 VadRoot : _RTL_AVL_TREE ``` 标识0-2G哪些地址没占用了 PEB --- ```php +0x550 Peb : Ptr64 _PEB ``` ### 前言 PEB，它是进程环境块是一个从内核分配给每个进程的用户模式结构，存放进程信息，每个进程都有自己的PEB信息。位于用户地址空间 PEB的位置取决于进程是在32位还是64位地址空间中运行 在32位进程中，可以在FS寄存器上找到具有48字节偏移量的PEB 在64位进程中，可以将其PEB定位在偏移的GS寄存器上 从Windows 2000以来，它就一直存在于 Windows 中，并且从那以后通过更新版本的 Windows 对其进行了改进 ### 实操 #### 伪装CommandLine ##### 手工实现 通常的恶意进程往往特征会比较明显，我们可以伪造PEB进程环境块来伪装自己，让自己的特征不那么明显，从而增加一点存活率 查看进程的PEB内容 ```php 0:010> r $PEB $peb=000000792ea25000 ``` ```php 0:010> dt _PEB @$PEB ntdll!_PEB +0x000 InheritedAddressSpace : 0 '' +0x001 ReadImageFileExecOptions : 0 '' +0x002 BeingDebugged : 0x1 '' +0x003 BitField : 0x84 '' +0x003 ImageUsesLargePages : 0y0 +0x003 IsProtectedProcess : 0y0 +0x003 IsImageDynamicallyRelocated : 0y1 +0x003 SkipPatchingUser32Forwarders : 0y0 +0x003 IsPackagedProcess : 0y0 +0x003 IsAppContainer : 0y0 +0x003 IsProtectedProcessLight : 0y0 +0x003 IsLongPathAwareProcess : 0y1 +0x004 Padding0 : [4] "" +0x008 Mutant : 0xffffffff`ffffffff Void +0x010 ImageBaseAddress : 0x00007ff6`a4710000 Void +0x018 Ldr : 0x00007ffd`2b0ba4c0 _PEB_LDR_DATA +0x020 ProcessParameters : 0x000001ce`40ff3390 _RTL_USER_PROCESS_PARAMETERS +0x028 SubSystemData : 0x00007ffd`1f3391d0 Void +0x030 ProcessHeap : 0x000001ce`40ff0000 Void +0x038 FastPebLock : 0x00007ffd`2b0ba0e0 _RTL_CRITICAL_SECTION +0x040 AtlThunkSListPtr : (null) +0x048 IFEOKey : (null) +0x050 CrossProcessFlags : 1 +0x050 ProcessInJob : 0y1 +0x050 ProcessInitializing : 0y0 +0x050 ProcessUsingVEH : 0y0 +0x050 ProcessUsingVCH : 0y0 +0x050 ProcessUsingFTH : 0y0 +0x050 ProcessPreviouslyThrottled : 0y0 +0x050 ProcessCurrentlyThrottled : 0y0 +0x050 ProcessImagesHotPatched : 0y0 +0x050 ReservedBits0 : 0y000000000000000000000000 (0) +0x054 Padding1 : [4] "" +0x058 KernelCallbackTable : 0x00007ffd`2a911070 Void +0x058 UserSharedInfoPtr : 0x00007ffd`2a911070 Void +0x060 SystemReserved : 0 +0x064 AtlThunkSListPtr32 : 0 +0x068 ApiSetMap : 0x000001ce`40f80000 Void +0x070 TlsExpansionCounter : 0 +0x074 Padding2 : [4] "" +0x078 TlsBitmap : 0x00007ffd`2b0ba440 Void +0x080 TlsBitmapBits : [2] 0xffffffff +0x088 ReadOnlySharedMemoryBase : 0x00007df4`81fe0000 Void +0x090 SharedData : (null) +0x098 ReadOnlyStaticServerData : 0x00007df4`81fe0750 -> (null) +0x0a0 AnsiCodePageData : 0x00007df5`84120000 Void +0x0a8 OemCodePageData : 0x00007df5`84120000 Void +0x0b0 UnicodeCaseTableData : 0x00007df5`84150028 Void +0x0b8 NumberOfProcessors : 0xc +0x0bc NtGlobalFlag : 0 +0x0c0 CriticalSectionTimeout : _LARGE_INTEGER 0xffffe86d`079b8000 +0x0c8 HeapSegmentReserve : 0x100000 +0x0d0 HeapSegmentCommit : 0x2000 +0x0d8 HeapDeCommitTotalFreeThreshold : 0x10000 +0x0e0 HeapDeCommitFreeBlockThreshold : 0x1000 +0x0e8 NumberOfHeaps : 4 +0x0ec MaximumNumberOfHeaps : 0x10 +0x0f0 ProcessHeaps : 0x00007ffd`2b0b8d40 -> 0x000001ce`40ff0000 Void +0x0f8 GdiSharedHandleTable : 0x000001ce`41430000 Void +0x100 ProcessStarterHelper : (null) +0x108 GdiDCAttributeList : 0x14 +0x10c Padding3 : [4] "" +0x110 LoaderLock : 0x00007ffd`2b0b44f8 _RTL_CRITICAL_SECTION +0x118 OSMajorVersion : 0xa +0x11c OSMinorVersion : 0 +0x120 OSBuildNumber : 0x4a64 +0x122 OSCSDVersion : 0 +0x124 OSPlatformId : 2 +0x128 ImageSubsystem : 2 +0x12c ImageSubsystemMajorVersion : 0xa +0x130 ImageSubsystemMinorVersion : 0 +0x134 Padding4 : [4] "" +0x138 ActiveProcessAffinityMask : 0xfff +0x140 GdiHandleBuffer : [60] 0 +0x230 PostProcessInitRoutine : (null) +0x238 TlsExpansionBitmap : 0x00007ffd`2b0ba420 Void +0x240 TlsExpansionBitmapBits : [32] 1 +0x2c0 SessionId : 2 +0x2c4 Padding5 : [4] "" +0x2c8 AppCompatFlags : _ULARGE_INTEGER 0x0 +0x2d0 AppCompatFlagsUser : _ULARGE_INTEGER 0x0 +0x2d8 pShimData : 0x000001ce`40fc0000 Void +0x2e0 AppCompatInfo : (null) +0x2e8 CSDVersion : _UNICODE_STRING "" +0x2f8 ActivationContextData : 0x000001ce`40fb0000 _ACTIVATION_CONTEXT_DATA +0x300 ProcessAssemblyStorageMap : 0x000001ce`40ffc1c0 _ASSEMBLY_STORAGE_MAP +0x308 SystemDefaultActivationContextData : 0x000001ce`40fa0000 _ACTIVATION_CONTEXT_DATA +0x310 SystemAssemblyStorageMap : (null) +0x318 MinimumStackCommit : 0 +0x320 SparePointers : [4] (null) +0x340 SpareUlongs : [5] 0 +0x358 WerRegistrationData : 0x000001ce`42e80000 Void +0x360 WerShipAssertPtr : (null) +0x368 pUnused : (null) +0x370 pImageHeaderHash : (null) +0x378 TracingFlags : 0 +0x378 HeapTracingEnabled : 0y0 +0x378 CritSecTracingEnabled : 0y0 +0x378 LibLoaderTracingEnabled : 0y0 +0x378 SpareTracingBits : 0y00000000000000000000000000000 (0) +0x37c Padding6 : [4] "" +0x380 CsrServerReadOnlySharedMemoryBase : 0x00007df4`89e00000 +0x388 TppWorkerpListLock : 0 +0x390 TppWorkerpList : _LIST_ENTRY [ 0x00000079`2e94f7b0 - 0x00000079`2edff7b0 ] +0x3a0 WaitOnAddressHashTable : [128] (null) +0x7a0 TelemetryCoverageHeader : (null) +0x7a8 CloudFileFlags : 0xe0 +0x7ac CloudFileDiagFlags : 0 +0x7b0 PlaceholderCompatibilityMode : 2 '' +0x7b1 PlaceholderCompatibilityModeReserved : [7] "" +0x7b8 LeapSecondData : 0x00007df5`84110000 _LEAP_SECOND_DATA +0x7c0 LeapSecondFlags : 0 +0x7c0 SixtySecondEnabled : 0y0 +0x7c0 Reserved : 0y0000000000000000000000000000000 (0) +0x7c4 NtGlobalFlag2 : 0 ```  在`0x00007ff7`b98c0000`处为：ImageBaseAddress ```php +0x010 ImageBaseAddress : 0x00007ff6`a4710000 Void ``` 查看其内容 ```php db 0x00007ff6`a4710000 L300 ``` ```php 0:010> db 0x00007ff6`a4710000 L300 00007ff6`a4710000 4d 5a 90 00 03 00 00 00-04 00 00 00 ff ff 00 00 MZ.............. 00007ff6`a4710010 b8 00 00 00 00 00 00 00-40 00 00 00 00 00 00 00 ........@....... 00007ff6`a4710020 00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00 ................ 00007ff6`a4710030 00 00 00 00 00 00 00 00-00 00 00 00 f8 00 00 00 ................ 00007ff6`a4710040 0e 1f ba 0e 00 b4 09 cd-21 b8 01 4c cd 21 54 68 ........!..L.!Th 00007ff6`a4710050 69 73 20 70 72 6f 67 72-61 6d 20 63 61 6e 6e 6f is program canno 00007ff6`a4710060 74 20 62 65 20 72 75 6e-20 69 6e 20 44 4f 53 20 t be run in DOS 00007ff6`a4710070 6d 6f 64 65 2e 0d 0d 0a-24 00 00 00 00 00 00 00 mode....$....... 00007ff6`a4710080 65 39 d7 77 21 58 b9 24-21 58 b9 24 21 58 b9 24 e9.w!X.$!X.$!X.$ 00007ff6`a4710090 28 20 2a 24 11 58 b9 24-35 33 bd 25 2b 58 b9 24 ( *$.X.$53.%+X.$ 00007ff6`a47100a0 35 33 ba 25 22 58 b9 24-35 33 b8 25 28 58 b9 24 53.%"X.$53.%(X.$ 00007ff6`a47100b0 21 58 b8 24 09 5d b9 24-35 33 b1 25 3f 58 b9 24 !X.$.].$53.%?X.$ 00007ff6`a47100c0 35 33 bc 25 3e 58 b9 24-35 33 44 24 20 58 b9 24 53.%>X.$53D$ X.$ 00007ff6`a47100d0 35 33 46 24 20 58 b9 24-35 33 bb 25 20 58 b9 24 53F$ X.$53.% X.$ 00007ff6`a47100e0 52 69 63 68 21 58 b9 24-00 00 00 00 00 00 00 00 Rich!X.$........ 00007ff6`a47100f0 00 00 00 00 00 00 00 00-50 45 00 00 64 86 07 00 ........PE..d... 00007ff6`a4710100 d3 ae 78 41 00 00 00 00-00 00 00 00 f0 00 22 00 ..xA..........". 00007ff6`a4710110 0b 02 0e 14 00 4a 02 00-00 e0 00 00 00 00 00 00 .....J.......... 00007ff6`a4710120 50 40 02 00 00 10 00 00-00 00 71 a4 f6 7f 00 00 P@........q..... 00007ff6`a4710130 00 10 00 00 00 02 00 00-0a 00 00 00 0a 00 00 00 ................ 00007ff6`a4710140 0a 00 00 00 00 00 00 00-00 80 03 00 00 04 00 00 ................ 00007ff6`a4710150 81 7b 03 00 02 00 60 c1-00 00 08 00 00 00 00 00 .{....`......... 00007ff6`a4710160 00 10 01 00 00 00 00 00-00 00 10 00 00 00 00 00 ................ 00007ff6`a4710170 00 10 00 00 00 00 00 00-00 00 00 00 10 00 00 00 ................ 00007ff6`a4710180 00 00 00 00 00 00 00 00-a8 d0 02 00 44 02 00 00 ............D... 00007ff6`a4710190 00 60 03 00 d8 0b 00 00-00 30 03 00 ec 10 00 00 .`.......0...... 00007ff6`a47101a0 00 00 00 00 00 00 00 00-00 70 03 00 d4 02 00 00 .........p...... 00007ff6`a47101b0 20 ac 02 00 54 00 00 00-00 00 00 00 00 00 00 00 ...T........... 00007ff6`a47101c0 00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00 ................ 00007ff6`a47101d0 d0 66 02 00 18 01 00 00-00 00 00 00 00 00 00 00 .f.............. 00007ff6`a47101e0 e8 67 02 00 00 09 00 00-c0 c9 02 00 e0 00 00 00 .g.............. 00007ff6`a47101f0 00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00 ................ 00007ff6`a4710200 2e 74 65 78 74 00 00 00-0f 49 02 00 00 10 00 00 .text....I...... 00007ff6`a4710210 00 4a 02 00 00 04 00 00-00 00 00 00 00 00 00 00 .J.............. 00007ff6`a4710220 00 00 00 00 20 00 00 60-2e 72 64 61 74 61 00 00 .... ..`.rdata.. 00007ff6`a4710230 68 92 00 00 00 60 02 00-00 94 00 00 00 4e 02 00 h....`.......N.. 00007ff6`a4710240 00 00 00 00 00 00 00 00-00 00 00 00 40 00 00 40 ............@..@ 00007ff6`a4710250 2e 64 61 74 61 00 00 00-38 27 00 00 00 00 03 00 .data...8'...... 00007ff6`a4710260 00 0e 00 00 00 e2 02 00-00 00 00 00 00 00 00 00 ................ 00007ff6`a4710270 00 00 00 00 40 00 00 c0-2e 70 64 61 74 61 00 00 ....@....pdata.. 00007ff6`a4710280 ec 10 00 00 00 30 03 00-00 12 00 00 00 f0 02 00 .....0.......... 00007ff6`a4710290 00 00 00 00 00 00 00 00-00 00 00 00 40 00 00 40 ............@..@ 00007ff6`a47102a0 2e 64 69 64 61 74 00 00-78 01 00 00 00 50 03 00 .didat..x....P.. 00007ff6`a47102b0 00 02 00 00 00 02 03 00-00 00 00 00 00 00 00 00 ................ 00007ff6`a47102c0 00 00 00 00 40 00 00 c0-2e 72 73 72 63 00 00 00 ....@....rsrc... 00007ff6`a47102d0 d8 0b 00 00 00 60 03 00-00 0c 00 00 00 04 03 00 .....`.......... 00007ff6`a47102e0 00 00 00 00 00 00 00 00-00 00 00 00 40 00 00 40 ............@..@ 00007ff6`a47102f0 2e 72 65 6c 6f 63 00 00-d4 02 00 00 00 70 03 00 .reloc.......p.. ```  更改这个进程的命令行参数，用到的是ProcessParameters 我们可以看到它的结构体为：`_RTL_USER_PROCESS_PARAMETERS` ```php +0x020 ProcessParameters : 0x000001ce`40ff3390 _RTL_USER_PROCESS_PARAMETERS ``` ```php 0:011> dt _PEB @$PEB ProcessP* ntdll!_PEB +0x020 ProcessParameters : 0x000001ce`40ff3390 _RTL_USER_PROCESS_PARAMETERS +0x050 ProcessPreviouslyThrottled : 0y0 ``` 查看其内容 ```php 0:010> dt _RTL_USER_PROCESS_PARAMETERS 0x000001ce`40ff3390 ntdll!_RTL_USER_PROCESS_PARAMETERS +0x000 MaximumLength : 0x78a +0x004 Length : 0x78a +0x008 Flags : 0x6001 +0x00c DebugFlags : 0 +0x010 ConsoleHandle : (null) +0x018 ConsoleFlags : 0 +0x020 StandardInput : (null) +0x028 StandardOutput : 0x00000000`00010001 Void +0x030 StandardError : (null) +0x038 CurrentDirectory : _CURDIR +0x050 DllPath : _UNICODE_STRING "" +0x060 ImagePathName : _UNICODE_STRING "C:\WINDOWS\system32\notepad.exe" +0x070 CommandLine : _UNICODE_STRING ""C:\WINDOWS\system32\notepad.exe" " +0x080 Environment : 0x000001ce`40ff0fe0 Void +0x088 StartingX : 0 +0x08c StartingY : 0 +0x090 CountX : 0 +0x094 CountY : 0 +0x098 CountCharsX : 0 +0x09c CountCharsY : 0 +0x0a0 FillAttribute : 0 +0x0a4 WindowFlags : 0xc01 +0x0a8 ShowWindowFlags : 1 +0x0b0 WindowTitle : _UNICODE_STRING "C:\ProgramData\Microsoft\Windows\Start Menu\Programs\Accessories\Notepad.lnk" +0x0c0 DesktopInfo : _UNICODE_STRING "Winsta0\Default" +0x0d0 ShellInfo : _UNICODE_STRING "" +0x0e0 RuntimeData : _UNICODE_STRING "" +0x0f0 CurrentDirectores : [32] _RTL_DRIVE_LETTER_CURDIR +0x3f0 EnvironmentSize : 0x23a4 +0x3f8 EnvironmentVersion : 3 +0x400 PackageDependencyData : (null) +0x408 ProcessGroupId : 0x6dc8 +0x40c LoaderThreads : 0 +0x410 RedirectionDllName : _UNICODE_STRING "" +0x420 HeapPartitionName : _UNICODE_STRING "" +0x430 DefaultThreadpoolCpuSetMasks : (null) +0x438 DefaultThreadpoolCpuSetMaskCount : 0 +0x43c DefaultThreadpoolThreadMaximum : 0 ```  其中的Commandline就是我们需要更改的项，其为一个`_UNICODE_STRING`结构 ```php +0x070 CommandLine : _UNICODE_STRING ""C:\WINDOWS\system32\notepad.exe" " ``` 进一步查看它的结构，地址+偏移即可 可以看到在 0x00000204`dfc73958 处就是我们需要更改的内容 ```php 0:010> dt _UNICODE_STRING 0x000001ce`40ff3390+0x070 ntdll!_UNICODE_STRING ""C:\WINDOWS\system32\notepad.exe" " +0x000 Length : 0x44 +0x002 MaximumLength : 0x46 +0x008 Buffer : 0x000001ce`40ff3a18 ""C:\WINDOWS\system32\notepad.exe" " ```  使用db也可以看到 ```php 0:010> db 0x000001ce`40ff3a18 000001ce`40ff3a18 22 00 43 00 3a 00 5c 00-57 00 49 00 4e 00 44 00 ".C.:.\.W.I.N.D. 000001ce`40ff3a28 4f 00 57 00 53 00 5c 00-73 00 79 00 73 00 74 00 O.W.S.\.s.y.s.t. 000001ce`40ff3a38 65 00 6d 00 33 00 32 00-5c 00 6e 00 6f 00 74 00 e.m.3.2.\.n.o.t. 000001ce`40ff3a48 65 00 70 00 61 00 64 00-2e 00 65 00 78 00 65 00 e.p.a.d...e.x.e. 000001ce`40ff3a58 22 00 20 00 00 00 43 00-3a 00 5c 00 50 00 72 00 ". ...C.:.\.P.r. 000001ce`40ff3a68 6f 00 67 00 72 00 61 00-6d 00 44 00 61 00 74 00 o.g.r.a.m.D.a.t. 000001ce`40ff3a78 61 00 5c 00 4d 00 69 00-63 00 72 00 6f 00 73 00 a.\.M.i.c.r.o.s. 000001ce`40ff3a88 6f 00 66 00 74 00 5c 00-57 00 69 00 6e 00 64 00 o.f.t.\.W.i.n.d. ```  使用ProcessHacker，查看notepad.exe进程 下载地址：<https://processhacker.sourceforge.io/downloads.php>  将其指向的字符串进行修改 ```php eu 0x000001ce`40ff3a18 "C:\\Windows\\System32\\matrix.exe" ``` 进行查看 ```php 0:010> dt _UNICODE_STRING 0x000001ce`40ff3390+0x070 ntdll!_UNICODE_STRING "C:\Windows\System32\matrix.exexe" " +0x000 Length : 0x44 +0x002 MaximumLength : 0x46 +0x008 Buffer : 0x000001ce`40ff3a18 "C:\Windows\System32\matrix.exexe" " ```  重启使用ProcessHacker，查看notepad.exe进程 成功修改  ##### 代码实现 使用`NtQueryInformationProcess` API函数 参考：<https://docs.microsoft.com/en-us/windows/win32/api/winternl/nf-winternl-ntqueryinformationprocess> (我这里在啰嗦一下) 作用：查看进程的信息 结构定义： ```php __kernel_entry NTSTATUS NtQueryInformationProcess( [in] HANDLE ProcessHandle, [in] PROCESSINFOCLASS ProcessInformationClass, [out] PVOID ProcessInformation, [in] ULONG ProcessInformationLength, [out, optional] PULONG ReturnLength ); ``` 注：该函数并没有被微软公开，它在Ntdll.dll 里导出的，所以要想调用此函数，得用LoadLibrary和GetProcAddress来加载 用的时候要`#include`头文件 参数介绍： ```php [in] ProcessHandle:要检索其信息的进程的句柄 [in] ProcessInformationClass:要检索的进程信息的类型，它是一个 PROCESSINFOCLASS 的枚举类型，可以取值: ProcessBasicInformation 0 ProcessDebugPort 7 ProcessWow64Information 26 ProcessImageFileName 27 ProcessBreakOnTermination 29 [out] ProcessInformation:要存放查询结果的缓冲区，这个结构要根据第二个参数取值来决定 ProcessInformationLength:缓冲区大小 ReturnLength:实际返回的写入缓冲区的字节数 ``` 继续看一下`ProcessBasicInformation`这个结构，**该结构体的第二个参数是指向PEB的指针** 官方定义如下： ```php typedef struct _PROCESS_BASIC_INFORMATION { PVOID Reserved1; PPEB PebBaseAddress; PVOID Reserved2[2]; ULONG_PTR UniqueProcessId; PVOID Reserved3; } PROCESS_BASIC_INFORMATION; ``` 注：修改字符串的同时最好也要修改该结构体的Lenght的成员，使用修改指针的方式实现 代码示例 ```php #include #include #include #include // 定义函数指针 typedef DWORD(*pNtQueryInformationProcess)( _In_ HANDLE ProcessHandle, _In_ PROCESSINFOCLASS ProcessInformationClass, _Out_ PVOID ProcessInformation, _In_ ULONG ProcessInformationLength, _Out_opt_ PULONG ReturnLength ); int main() { HANDLE hProcess = 0; ULONG length = 0; HMODULE hModule; PROCESS_BASIC_INFORMATION ProcessInformation; pNtQueryInformationProcess NtQueryInformationProcess; wchar_t CommandLine[] = L"C:\\Windows\\system32\\notepad.exe"; hModule = LoadLibraryA("Ntdll.dll"); // 返回值是当前进程的伪句柄 // 此句柄具有对进程对象的 PROCESS_ALL_ACCESS 访问权限 // 当不再需要伪句柄时，不需要关闭它 hProcess = GetCurrentProcess(); // 获取ntdll.dll中 NtQueryInformationProcess 函数的地址 NtQueryInformationProcess = (pNtQueryInformationProcess)GetProcAddress(hModule, "NtQueryInformationProcess"); // 获取PEB NtQueryInformationProcess(hProcess, ProcessBasicInformation, &ProcessInformation, sizeof(ProcessInformation), &length); ProcessInformation.PebBaseAddress->ProcessParameters->CommandLine.Length = sizeof(CommandLine); ProcessInformation.PebBaseAddress->ProcessParameters->CommandLine.Buffer = (PWSTR)&CommandLine; getchar(); return 0; } ```  #### 查看调用的dll 操作系统会在ring3维护一个结构体PEB(进程环境块) x86环境下，段寄存器`FS:[00]`在三环时始终指向TEB(线程环境块)，TEB偏移0x30则指向该进程的PEB x64环境下，段寄存器`GS:[00]`在三环时始终指向TEB(线程环境块)，TEB偏移0x60则指向该进程的PEB 通常我们可以使用内联汇编的方式获取PEB位于内存的虚拟地址 ```php mov eax, fs: [0x30] ;x86 mov eax, gs: [0x60] ;x64 ``` 通过Windbg定位TEB->PEB ```php 0:010> r $TEB $teb=000000792ea3c000 ``` ```php 0:010> dt _TEB @$TEB ntdll!_TEB +0x000 NtTib : _NT_TIB +0x038 EnvironmentPointer : (null) +0x040 ClientId : _CLIENT_ID +0x050 ActiveRpcHandle : (null) +0x058 ThreadLocalStoragePointer : (null) +0x060 ProcessEnvironmentBlock : 0x00000079`2ea25000 _PEB +0x068 LastErrorValue : 0 +0x06c CountOfOwnedCriticalSections : 0 +0x070 CsrClientThread : (null) +0x078 Win32ThreadInfo : (null) +0x080 User32Reserved : [26] 0 +0x0e8 UserReserved : [5] 0 +0x100 WOW32Reserved : (null) +0x108 CurrentLocale : 0x804 +0x10c FpSoftwareStatusRegister : 0 +0x110 ReservedForDebuggerInstrumentation : [16] (null) +0x190 SystemReserved1 : [30] (null) +0x280 PlaceholderCompatibilityMode : 0 '' +0x281 PlaceholderHydrationAlwaysExplicit : 0 '' +0x282 PlaceholderReserved : [10] "" +0x28c ProxiedProcessId : 0 +0x290 _ActivationStack : _ACTIVATION_CONTEXT_STACK +0x2b8 WorkingOnBehalfTicket : [8] "" +0x2c0 ExceptionCode : 0n0 +0x2c4 Padding0 : [4] "" +0x2c8 ActivationContextStackPointer : 0x00000079`2ea3c290 _ACTIVATION_CONTEXT_STACK +0x2d0 InstrumentationCallbackSp : 0 +0x2d8 InstrumentationCallbackPreviousPc : 0 +0x2e0 InstrumentationCallbackPreviousSp : 0 +0x2e8 TxFsContext : 0xfffe +0x2ec InstrumentationCallbackDisabled : 0 '' +0x2ed UnalignedLoadStoreExceptions : 0 '' +0x2ee Padding1 : [2] "" +0x2f0 GdiTebBatch : _GDI_TEB_BATCH +0x7d8 RealClientId : _CLIENT_ID +0x7e8 GdiCachedProcessHandle : (null) +0x7f0 GdiClientPID : 0 +0x7f4 GdiClientTID : 0 +0x7f8 GdiThreadLocalInfo : (null) +0x800 Win32ClientInfo : [62] 0 +0x9f0 glDispatchTable : [233] (null) +0x1138 glReserved1 : [29] 0 +0x1220 glReserved2 : (null) +0x1228 glSectionInfo : (null) +0x1230 glSection : (null) +0x1238 glTable : (null) +0x1240 glCurrentRC : (null) +0x1248 glContext : (null) +0x1250 LastStatusValue : 0 +0x1254 Padding2 : [4] "" +0x1258 StaticUnicodeString : _UNICODE_STRING "" +0x1268 StaticUnicodeBuffer : [261] "" +0x1472 Padding3 : [6] "" +0x1478 DeallocationStack : 0x00000079`2ef80000 Void +0x1480 TlsSlots : [64] (null) +0x1680 TlsLinks : _LIST_ENTRY [ 0x00000000`00000000 - 0x00000000`00000000 ] +0x1690 Vdm : (null) +0x1698 ReservedForNtRpc : (null) +0x16a0 DbgSsReserved : [2] (null) +0x16b0 HardErrorMode : 0 +0x16b4 Padding4 : [4] "" +0x16b8 Instrumentation : [11] (null) +0x1710 ActivityId : _GUID {00000000-0000-0000-0000-000000000000} +0x1720 SubProcessTag : (null) +0x1728 PerflibData : (null) +0x1730 EtwTraceData : (null) +0x1738 WinSockData : (null) +0x1740 GdiBatchCount : 0 +0x1744 CurrentIdealProcessor : _PROCESSOR_NUMBER +0x1744 IdealProcessorValue : 0 +0x1744 ReservedPad0 : 0 '' +0x1745 ReservedPad1 : 0 '' +0x1746 ReservedPad2 : 0 '' +0x1747 IdealProcessor : 0 '' +0x1748 GuaranteedStackBytes : 0 +0x174c Padding5 : [4] "" +0x1750 ReservedForPerf : (null) +0x1758 ReservedForOle : (null) +0x1760 WaitingOnLoaderLock : 0 +0x1764 Padding6 : [4] "" +0x1768 SavedPriorityState : (null) +0x1770 ReservedForCodeCoverage : 0 +0x1778 ThreadPoolData : (null) +0x1780 TlsExpansionSlots : (null) +0x1788 DeallocationBStore : (null) +0x1790 BStoreLimit : (null) +0x1798 MuiGeneration : 0 +0x179c IsImpersonating : 0 +0x17a0 NlsCache : (null) +0x17a8 pShimData : (null) +0x17b0 HeapData : 0 +0x17b4 Padding7 : [4] "" +0x17b8 CurrentTransactionHandle : (null) +0x17c0 ActiveFrame : (null) +0x17c8 FlsData : (null) +0x17d0 PreferredLanguages : (null) +0x17d8 UserPrefLanguages : (null) +0x17e0 MergedPrefLanguages : (null) +0x17e8 MuiImpersonation : 0 +0x17ec CrossTebFlags : 0 +0x17ec SpareCrossTebBits : 0y0000000000000000 (0) +0x17ee SameTebFlags : 8 +0x17ee SafeThunkCall : 0y0 +0x17ee InDebugPrint : 0y0 +0x17ee HasFiberData : 0y0 +0x17ee SkipThreadAttach : 0y1 +0x17ee WerInShipAssertCode : 0y0 +0x17ee RanProcessInit : 0y0 +0x17ee ClonedThread : 0y0 +0x17ee SuppressDebugMsg : 0y0 +0x17ee DisableUserStackWalk : 0y0 +0x17ee RtlExceptionAttached : 0y0 +0x17ee InitialThread : 0y0 +0x17ee SessionAware : 0y0 +0x17ee LoadOwner : 0y0 +0x17ee LoaderWorker : 0y0 +0x17ee SkipLoaderInit : 0y0 +0x17ee SpareSameTebBits : 0y0 +0x17f0 TxnScopeEnterCallback : (null) +0x17f8 TxnScopeExitCallback : (null) +0x1800 TxnScopeContext : (null) +0x1808 LockCount : 0 +0x180c WowTebOffset : 0n0 +0x1810 ResourceRetValue : (null) +0x1818 ReservedForWdf : (null) +0x1820 ReservedForCrt : 0 +0x1828 EffectiveContainerId : _GUID {00000000-0000-0000-0000-000000000000} ``` PEB在 ```php +0x060 ProcessEnvironmentBlock : 0x00000079`2ea25000 _PEB ``` 在PEB偏移`0x018`位置存在着三条模块链表 ```php +0x018 Ldr : 0x00007ffd`2b0ba4c0 _PEB_LDR_DATA ``` 使用汇编获取 ```php mov eax, [eax + 0x018]; x64 mov eax, [eax + 0x0c] ;x86 ``` 根据链表含义分别是 模块加载顺序、模块初始化顺序、模块内存顺序 ```php 0:010> dt _PEB_LDR_DATA 0x00007ffd`2b0ba4c0 ntdll!_PEB_LDR_DATA +0x000 Length : 0x58 +0x004 Initialized : 0x1 '' +0x008 SsHandle : (null) +0x010 InLoadOrderModuleList : _LIST_ENTRY [ 0x000001ce`40ff3dc0 - 0x000001ce`410232d0 ] +0x020 InMemoryOrderModuleList : _LIST_ENTRY [ 0x000001ce`40ff3dd0 - 0x000001ce`410232e0 ] +0x030 InInitializationOrderModuleList : _LIST_ENTRY [ 0x000001ce`40ff3c50 - 0x000001ce`410232f0 ] +0x040 EntryInProgress : (null) +0x048 ShutdownInProgress : 0 '' +0x050 ShutdownThreadId : (null) ``` 这三个双向链表`LIST_ENTRY`，链表的每一个都是指向`_LDR_DATA_TABLE_ENTRY`结构的指针 它们分别代表**模块加载顺序，模块在内存中的加载顺序、模块初始化装载的顺序** `_PEB_LDR_DATA`的定义如下 ```php typedef struct _PEB_LDR_DATA { ULONG Length; ULONG Initialized; PVOID SsHandle; LIST_ENTRY InLoadOrderModuleList; LIST_ENTRY InMemoryOrderModuleList; LIST_ENTRY InInitializationOrderModuleList; } PEB_LDR_DATA, * PPEB_LDR_DATA; ``` `_LDR_DATA_TABLE_ENTRY`的定义如下 ```php typedef struct _LDR_DATA_TABLE_ENTRY { PVOID Reserved1[2]; LIST_ENTRY InMemoryOrderLinks; PVOID Reserved2[2]; PVOID DllBase; // 模块基地址 PVOID EntryPoint; PVOID Reserved3; UNICODE_STRING FullDllName;// 模块名称 BYTE Reserved4[8]; PVOID Reserved5[3]; union { ULONG CheckSum; PVOID Reserved6; }; ULONG TimeDateStamp; } LDR_DATA_TABLE_ENTRY, *PLDR_DATA_TABLE_ENTRY; ``` 我们用到的是其中的`InMemoryOrderModuleList` ，它在`_LIST_ENTRY`与`_LDR_DATA_TABLE_ENTRY`之中 ```php 0:010> dt _LIST_ENTRY 0x000001ce`40ff3dd0 ntdll!_LIST_ENTRY [ 0x000001ce`40ff3c40 - 0x00007ffd`2b0ba4e0 ] +0x000 Flink : 0x000001ce`40ff3c40 _LIST_ENTRY [ 0x000001ce`40ff4290 - 0x000001ce`40ff3dd0 ] +0x008 Blink : 0x00007ffd`2b0ba4e0 _LIST_ENTRY [ 0x000001ce`40ff3dd0 - 0x000001ce`410232e0 ] ``` ```php 0:010> dt _LDR_DATA_TABLE_ENTRY 0x000001ce`40ff3dd0 ntdll!_LDR_DATA_TABLE_ENTRY +0x000 InLoadOrderLinks : _LIST_ENTRY [ 0x000001ce`40ff3c40 - 0x00007ffd`2b0ba4e0 ] +0x010 InMemoryOrderLinks : _LIST_ENTRY [ 0x00000000`00000000 - 0x00000000`00000000 ] +0x020 InInitializationOrderLinks : _LIST_ENTRY [ 0x00007ff6`a4710000 - 0x00007ff6`a4734050 ] +0x030 DllBase : 0x00000000`00038000 Void +0x038 EntryPoint : 0x00000000`0040003e Void +0x040 SizeOfImage : 0x40ff39d8 +0x048 FullDllName : _UNICODE_STRING "notepad.exe" +0x058 BaseDllName : _UNICODE_STRING "雰䄀ǎ" +0x068 FlagGroup : [4] "???" +0x068 Flags : 0x2b0ba190 +0x068 PackagedBinary : 0y0 +0x068 MarkedForRemoval : 0y0 +0x068 ImageDll : 0y0 +0x068 LoadNotificationsSent : 0y0 +0x068 TelemetryEntryProcessed : 0y1 +0x068 ProcessStaticImport : 0y0 +0x068 InLegacyLists : 0y0 +0x068 InIndexes : 0y1 +0x068 ShimDll : 0y1 +0x068 InExceptionTable : 0y0 +0x068 ReservedFlags1 : 0y00 +0x068 LoadInProgress : 0y0 +0x068 LoadConfigProcessed : 0y1 +0x068 EntryProcessed : 0y0 +0x068 ProtectDelayLoad : 0y1 +0x068 ReservedFlags3 : 0y11 +0x068 DontCallForThreads : 0y0 +0x068 ProcessAttachCalled : 0y1 +0x068 ProcessAttachFailed : 0y0 +0x068 CorDeferredValidate : 0y0 +0x068 CorImage : 0y0 +0x068 DontRelocate : 0y0 +0x068 CorILOnly : 0y1 +0x068 ChpeImage : 0y1 +0x068 ReservedFlags5 : 0y10 +0x068 Redirected : 0y0 +0x068 ReservedFlags6 : 0y01 +0x068 CompatDatabaseProcessed : 0y0 +0x06c ObsoleteLoadCount : 0x7ffd +0x06e TlsIndex : 0 +0x070 HashLinks : _LIST_ENTRY [ 0x00000000`4178aed3 - 0x00000000`00000000 ] +0x080 TimeDateStamp : 0 +0x088 EntryPointActivationContext : 0x000001ce`40ff3ef0 _ACTIVATION_CONTEXT +0x090 Lock : 0x000001ce`40ff3ef0 Void +0x098 DdagNode : 0x000001ce`40ff3ef0 _LDR_DDAG_NODE +0x0a0 NodeModuleLink : _LIST_ENTRY [ 0x00000000`00000000 - 0x00000000`00000000 ] +0x0b0 LoadContext : 0x00007ffd`2b06c3a4 _LDRP_LOAD_CONTEXT +0x0b8 ParentDllBase : (null) +0x0c0 SwitchBackContext : (null) +0x0c8 BaseAddressIndexNode : _RTL_BALANCED_NODE +0x0e0 MappingInfoIndexNode : _RTL_BALANCED_NODE +0x0f8 OriginalBase : 0x00000004`4c900b25 +0x100 LoadTime : _LARGE_INTEGER 0x00000002`00000000 +0x108 BaseNameHashValue : 0 +0x10c LoadReason : 0 ( LoadReasonStaticDependency ) +0x110 ImplicitPathOptions : 0 +0x114 ReferenceCount : 0 +0x118 DependentLoadFlags : 0xe93fdc0b +0x11c SigningLevel : 0xf '' ```  因为它是一个内存区域我们可以用循环的方式来遍历它 ```php !list -x "dt _LDR_DATA_TABLE_ENTRY" 0x000001ce`40ff3dd0 ``` 注：这里我就不贴输出了  跟进其结构，实现模块断链隐藏dll也是没问题的 使用`!dlls`也可以达到同样的效果 注：这里我就不贴输出了  ### 获取PEB PEB结构非常复杂 贴一下大佬们整理好的头文件，方便相关结构体调用 <http://bytepointer.com/resources/tebpeb32.htm> <http://bytepointer.com/resources/tebpeb64.htm> #### NtQueryInformationProcess NtQueryInformationProcess 的第二个参数可以是一个PROCESS\_BASIC\_INFORMATION的结构体 该结构体的第二个参数是指向PEB的指针，所以我们可以使用该方法来获取PEB的内容 #### 汇编调用 对于获取PEB来说32位与64位并不相同，分别存放在fs与gs寄存器中 x64汇编： ```php GetPEBAsm64 proc push rbx xor rbx,rbx xor rax,rax mov rbx, qword ptr gs:[00000060h] mov rax, rbx pop rbx ret GetPEBAsm64 endp ``` x86汇编(采用内联汇编)： ```php __asm { mov eax, dword ptr fs : [00000030h] mov peb, eax } ``` 因为VStudio默认支持x86汇编，这里来演示x64如何内联汇编查找PEB，这里的代码直接选择获取其参数： ```php .code ProcParam PROC mov rax, gs:[30h] ; TEB from gs in 64 bit only mov rax, [rax+60h] ; PEB mov rax, [rax+20h] ; RTL_USER_PROCESS_PARAMETERS ret ProcParam ENDP end ``` 原结构 ```php typedef struct _RTL_USER_PROCESS_PARAMETERS { DWORD MaximumLength; //0x00 DWORD Length; //0x04 DWORD Flags; //0x08 DWORD DebugFlags; //0x0C void* ConsoleHandle; //0x10 DWORD ConsoleFlags; //0x14 HANDLE StdInputHandle; //0x18 HANDLE StdOutputHandle; //0x1C HANDLE StdErrorHandle; //0x20 UNICODE_STRING CurrentDirectoryPath; //0x24 HANDLE CurrentDirectoryHandle; //0x2C UNICODE_STRING DllPath; //0x30 UNICODE_STRING ImagePathName; //0x38 UNICODE_STRING CommandLine; //0x40 void* Environment; //0x48 DWORD StartingPositionLeft; //0x4C DWORD StartingPositionTop; //0x50 DWORD Width; //0x54 DWORD Height; //0x58 DWORD CharWidth; //0x5C DWORD CharHeight; //0x60 DWORD ConsoleTextAttributes; //0x64 DWORD WindowFlags; //0x68 DWORD ShowWindowFlags; //0x6C UNICODE_STRING WindowTitle; //0x70UNICODE_STRING DesktopName; //0x78 UNICODE_STRING ShellInfo; //0x80 UNICODE_STRING RuntimeData; //0x88 RTL_DRIVE_LETTER_CURDIR DLCurrentDirectory[0x20]; //0x90 } RTL_USER_PROCESS_PARAMETERS; ``` 定义主程序，根据原结构可以做自己需要的修改 ```php #include #include typedef struct _UNICODE_STRING { unsigned short Length; unsigned short MaximumLength; wchar_t* Buffer; } UNICODE_STRING, * PUNICODE_STRING; typedef struct _CURDIR { UNICODE_STRING DosPath; void* Handle; } CURDIR, * PCURDIR; typedef struct _RTL_USER_PROCESS_PARAMETERS { unsigned int MaximumLength; unsigned int Length; unsigned int Flags; unsigned int DebugFlags; void* ConsoleHandle; unsigned int ConsoleFlags; void* StandardInput; void* StandardOutput; void* StandardError; CURDIR CurrentDirectory; } RTL_USER_PROCESS_PARAMETERS, * PRTL_USER_PROCESS_PARAMETERS; PRTL_USER_PROCESS_PARAMETERS ProcParam(void); int main(void) { wprintf(L"%s\n", ProcParam()->CurrentDirectory.DosPath.Buffer); } ``` 添加汇编文件  配置汇编文件  生成依赖项中勾选asm   #### 内部函数 像 `__readfsbyte` 、 `__readfsdword` 这类双下划线开头的都是内部函数，与正常函数的区别在于，这些函数直接存在于编译器中，在编译器编译的时候，会将它们直接替换成对应的指令集 32位：`__readfsbyte、__readfsdword、__readfsqword、__readfsword` 从相对于 FS 段开头的偏移量指定的位置读取内存 ```C unsigned char __readfsbyte( unsigned long Offset ); unsigned short __readfsword( unsigned long Offset ); unsigned long __readfsdword( unsigned long Offset ); unsigned __int64 __readfsqword( unsigned long Offset ); ``` 64位：`__readgsbyte、__readgsdword、__readgsqword、__readgsword` 从相对于 GS 段开头的偏移量指定的位置读取内存。 ```C unsigned char __readgsbyte( unsigned long Offset ); unsigned short __readgsword( unsigned long Offset ); unsigned long __readgsdword( unsigned long Offset ); unsigned __int64 __readgsqword( unsigned long Offset ); ``` 代码示例 ```php int main(VOID) { PPEB Peb = (PPEB)__readfsdword(0x30); //32bit process PPEB Peb = (PPEB)__readgsqword(0x60); //64bit process return ERROR_SUCCESS; } ``` 整体代码 ```php #include #include #include typedef struct _UNICODE_STRING { USHORT Length; USHORT MaximumLength; PWSTR Buffer; } UNICODE_STRING, * PUNICODE_STRING; typedef struct _PEB_LDR_DATA { BYTE Reserved1[8]; PVOID Reserved2[3]; LIST_ENTRY InMemoryOrderModuleList; } PEB_LDR_DATA, * PPEB_LDR_DATA; typedef struct _RTL_USER_PROCESS_PARAMETERS { BYTE Reserved1[16]; PVOID Reserved2[10]; UNICODE_STRING ImagePathName; UNICODE_STRING CommandLine; } RTL_USER_PROCESS_PARAMETERS, * PRTL_USER_PROCESS_PARAMETERS; typedef struct _PEB { BYTE Reserved1[2]; BYTE BeingDebugged; BYTE Reserved2[1]; PVOID Reserved3[2]; PPEB_LDR_DATA Ldr; PRTL_USER_PROCESS_PARAMETERS ProcessParameters; PVOID Reserved4[3]; PVOID AtlThunkSListPtr; PVOID Reserved5; ULONG Reserved6; PVOID Reserved7; ULONG Reserved8; ULONG AtlThunkSListPtr32; PVOID Reserved9[45]; BYTE Reserved10[96]; BYTE Reserved11[128]; PVOID Reserved12[1]; ULONG SessionId; } PEB, * PPEB; #ifndef _WIN64 PPEB pPeb = (PPEB)__readfsdword(0x30); #else PPEB pPeb = (PPEB)__readgsqword(0x60); #endif // _WIN64 int main(void) { wprintf(L"%s\n", pPeb->ProcessParameters->ImagePathName.Buffer); } ``` 
发表于 2022-05-06 09:49:29
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