通过PEB获取模块基址

TEB偏移0x30处，即FS:[0x30]地址处保存着一个指针，指向PEB，PEB结构的偏移0xC处保存着另外一个指针ldr，该指针执行PEB_LDR_DATA

PEB结构

typedef struct _PEB { // Size: 0x1D8
/*000*/ UCHAR InheritedAddressSpace;
/*001*/ UCHAR ReadImageFileExecOptions;
/*002*/ UCHAR BeingDebugged;
/*003*/ UCHAR SpareBool; // Allocation size
/*004*/ HANDLE Mutant;
/*008*/ HINSTANCE ImageBaseAddress; // Instance
/*00C*/ VOID *DllList;  //_PEB_LDR_DATA        ;进程加载的模块链表
/*010*/ PPROCESS_PARAMETERS *ProcessParameters;
/*014*/ ULONG SubSystemData;
/*018*/ HANDLE DefaultHeap;
/*01C*/ KSPIN_LOCK FastPebLock;
/*020*/ ULONG FastPebLockRoutine;
/*024*/ ULONG FastPebUnlockRoutine;
/*028*/ ULONG EnvironmentUpdateCount;
/*02C*/ ULONG KernelCallbackTable;
/*030*/ LARGE_INTEGER SystemReserved;
/*038*/ ULONG FreeList;
/*03C*/ ULONG TlsExpansionCounter;
/*040*/ ULONG TlsBitmap;
/*044*/ LARGE_INTEGER TlsBitmapBits;
/*04C*/ ULONG ReadOnlySharedMemoryBase;
/*050*/ ULONG ReadOnlySharedMemoryHeap;
/*054*/ ULONG ReadOnlyStaticServerData;
/*058*/ ULONG AnsiCodePageData;
/*05C*/ ULONG OemCodePageData;
/*060*/ ULONG UnicodeCaseTableData;
/*064*/ ULONG NumberOfProcessors;
/*068*/ LARGE_INTEGER NtGlobalFlag; // Address of a local copy
/*070*/ LARGE_INTEGER CriticalSectionTimeout;
/*078*/ ULONG HeapSegmentReserve;
/*07C*/ ULONG HeapSegmentCommit;
/*080*/ ULONG HeapDeCommitTotalFreeThreshold;
/*084*/ ULONG HeapDeCommitFreeBlockThreshold;
/*088*/ ULONG NumberOfHeaps;
/*08C*/ ULONG MaximumNumberOfHeaps;
/*090*/ ULONG ProcessHeaps;
/*094*/ ULONG GdiSharedHandleTable;
/*098*/ ULONG ProcessStarterHelper;
/*09C*/ ULONG GdiDCAttributeList;
/*0A0*/ KSPIN_LOCK LoaderLock;
/*0A4*/ ULONG OSMajorVersion;
/*0A8*/ ULONG OSMinorVersion;
/*0AC*/ USHORT OSBuildNumber;
/*0AE*/ USHORT OSCSDVersion;
/*0B0*/ ULONG OSPlatformId;
/*0B4*/ ULONG ImageSubsystem;
/*0B8*/ ULONG ImageSubsystemMajorVersion;
/*0BC*/ ULONG ImageSubsystemMinorVersion;
/*0C0*/ ULONG ImageProcessAffinityMask;
/*0C4*/ ULONG GdiHandleBuffer[0x22];
/*14C*/ ULONG PostProcessInitRoutine;
/*150*/ ULONG TlsExpansionBitmap;
/*154*/ UCHAR TlsExpansionBitmapBits[0x80];
/*1D4*/ ULONG SessionId;
} PEB, *PPEB;

PEB_LDR_DATA结构

typedef struct _PEB_LDR_DATA
{
　ULONG Length; // +0x00
　BOOLEAN Initialized; // +0x04
　PVOID SsHandle; // +0x08
　LIST_ENTRY InLoadOrderModuleList; // +0x0c
　LIST_ENTRY InMemoryOrderModuleList; // +0x14
　LIST_ENTRY InInitializationOrderModuleList;// +0x1c
} PEB_LDR_DATA,*PPEB_LDR_DATA; // +0x24

该结构的后三个成员是指向LDR_MODULE链表结构中相应三条双向链表头的指针，分别是按照加载顺序、在内存中地址顺序和初始化顺序排列的模块信息结构的指针。LDR_MODULE结构，其实就是_LDR_DATA_TABLE_ENTRY结构

LDR_DATA_TABLE_ENTRY 结构

typedef struct _LDR_DATA_TABLE_ENTRY  
{  
    LIST_ENTRY InLoadOrderLinks;  
    LIST_ENTRY InMemoryOrderLinks;  
    LIST_ENTRY InInitializationOrderLinks;  
    PVOID DllBase;  
    PVOID EntryPoint;  
    DWORD SizeOfImage;  
    UNICODE_STRING FullDllName;  
    UNICODE_STRING BaseDllName;  
    DWORD Flags;  
    WORD LoadCount;  
    WORD TlsIndex;  
    LIST_ENTRY HashLinks;  
    PVOID SectionPointer;  
    DWORD CheckSum;  
    DWORD TimeDateStamp;  
    PVOID LoadedImports;  
    PVOID EntryPointActivationContext;  
    PVOID PatchInformation;  
}LDR_DATA_TABLE_ENTRY,*PLDR_DATA_TABLE_ENTRY;  

LIST_ENTRY结构 

typedef struct _LIST_ENTRY 
{
       struct _LIST_ENTRY *Flink; 
       struct _LIST_ENTRY *Blink; 
} LIST_ENTRY, *PLIST_ENTRY;

获取模块的基址代码

void _getModuleBaseAddr()
{
    void *PEB = NULL,
        *Ldr = NULL,
        *Flink = NULL,
        *p = NULL,
        *BaseAddress = NULL,
        *FullDllName = NULL;

    __asm
    {
        mov eax, fs:[0x30]
        mov PEB, eax
    }
    Ldr = (PVOID)*((PDWORD)((DWORD)PEB + 0x0c));
    Flink = (PVOID)*((PDWORD)((DWORD)Ldr + 0x14));
    p = Flink;
    do
    {
        BaseAddress = (PVOID)*((PDWORD)((DWORD)p + 0x10));
        FullDllName = (PVOID)*((PDWORD)((DWORD)p + 0x20));
        wprintf(L"FullDllName is %s\n", FullDllName);
        printf("BaseAddress is %x\n", BaseAddress);
        p = (PVOID)*((PDWORD)p);
    } while (Flink != p);
}