AntiDebuggerDemo/DebugFlags.cpp at master · helloobaby/AntiDebuggerDemo · GitHub

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#include "DebugFlags.h"
extern bool isDebugged;
typedef enum _PROCESSINFOCLASS {
    ProcessBasicInformation = 0,
    ProcessQuotaLimits = 1,
    ProcessIoCounters = 2,
    ProcessVmCounters = 3,
    ProcessTimes = 4,
    ProcessBasePriority = 5,
    ProcessRaisePriority = 6,
    ProcessDebugPort = 7,
    ProcessExceptionPort = 8,
    ProcessAccessToken = 9,
    ProcessLdtInformation = 10,
    ProcessLdtSize = 11,
    ProcessDefaultHardErrorMode = 12,
    ProcessIoPortHandlers = 13,   // Note: this is kernel mode only
    ProcessPooledUsageAndLimits = 14,
    ProcessWorkingSetWatch = 15,
    ProcessUserModeIOPL = 16,
    ProcessEnableAlignmentFaultFixup = 17,
    ProcessPriorityClass = 18,
    ProcessWx86Information = 19,
    ProcessHandleCount = 20,
    ProcessAffinityMask = 21,
    ProcessPriorityBoost = 22,
    ProcessDeviceMap = 23,
    ProcessSessionInformation = 24,
    ProcessForegroundInformation = 25,
    ProcessWow64Information = 26,
    ProcessImageFileName = 27,
    ProcessLUIDDeviceMapsEnabled = 28,
    ProcessBreakOnTermination = 29,
    ProcessDebugObjectHandle = 30,
    ProcessDebugFlags = 31,
    ProcessHandleTracing = 32,
    ProcessIoPriority = 33,
    ProcessExecuteFlags = 34,
    ProcessTlsInformation = 35,
    ProcessCookie = 36,
    ProcessImageInformation = 37,
    ProcessCycleTime = 38,
    ProcessPagePriority = 39,
    ProcessInstrumentationCallback = 40,
    ProcessThreadStackAllocation = 41,
    ProcessWorkingSetWatchEx = 42,
    ProcessImageFileNameWin32 = 43,
    ProcessImageFileMapping = 44,
    ProcessAffinityUpdateMode = 45,
    ProcessMemoryAllocationMode = 46,
    ProcessGroupInformation = 47,
    ProcessTokenVirtualizationEnabled = 48,
    ProcessOwnerInformation = 49,
    ProcessWindowInformation = 50,
    ProcessHandleInformation = 51,
    ProcessMitigationPolicy = 52,
    ProcessDynamicFunctionTableInformation = 53,
    ProcessHandleCheckingMode = 54,
    ProcessKeepAliveCount = 55,
    ProcessRevokeFileHandles = 56,
    ProcessWorkingSetControl = 57,
    ProcessHandleTable = 58,
    ProcessCheckStackExtentsMode = 59,
    ProcessCommandLineInformation = 60,
    ProcessProtectionInformation = 61,
    ProcessMemoryExhaustion = 62,
    ProcessFaultInformation = 63,
    ProcessTelemetryIdInformation = 64,
    ProcessCommitReleaseInformation = 65,
    ProcessReserved1Information = 66,
    ProcessReserved2Information = 67,
    ProcessSubsystemProcess = 68,
    ProcessInPrivate = 70,
    ProcessRaiseUMExceptionOnInvalidHandleClose = 71,
    ProcessSubsystemInformation = 75,
    ProcessWin32kSyscallFilterInformation = 79,
    ProcessEnergyTrackingState = 82,
    MaxProcessInfoClass                             // MaxProcessInfoClass should always be the last enum
} PROCESSINFOCLASS;
typedef struct _PROCESS_BASIC_INFORMATION
{
    NTSTATUS ExitStatus;
    PVOID     PebBaseAddress;
    ULONG    AffinityMask;
    LONG     BasePriority;
    ULONG    UniqueProcessId;
    ULONG    InheritedFromUniqueProcessId;
} PROCESS_BASIC_INFORMATION;
typedef PROCESS_BASIC_INFORMATION* PPROCESS_BASIC_INFORMATION;
typedef NTSTATUS(NTAPI* TNtQueryInformationProcess)(
    IN HANDLE           ProcessHandle,
    IN PROCESSINFOCLASS ProcessInformationClass,
    OUT PVOID           ProcessInformation,
    IN ULONG            ProcessInformationLength,
    OUT PULONG          ReturnLength
    );

void DebugFlag::start()
{
    HMODULE hNtdll = LoadLibraryA("ntdll.dll");
    if (hNtdll)
    {
        auto pfnNtQueryInformationProcess = (TNtQueryInformationProcess)GetProcAddress(
            hNtdll, "NtQueryInformationProcess");

        if (pfnNtQueryInformationProcess)
        {
            DWORD dwProcessDebugPort = 0, dwReturned;
            NTSTATUS status = pfnNtQueryInformationProcess(
                GetCurrentProcess(),
                ProcessDebugPort,
                &dwProcessDebugPort,
                sizeof(DWORD),
                &dwReturned);
            if (dwProcessDebugPort != 0)
                isDebugged = true;

            HANDLE hProcessDebugObject = 0;
            status = pfnNtQueryInformationProcess(
                GetCurrentProcess(),
                ProcessDebugObjectHandle,
                &hProcessDebugObject,
                sizeof(HANDLE),
                &dwReturned);

            if (0 != hProcessDebugObject)
                isDebugged = true;

            HWND hExplorerWnd = GetShellWindow();
            if (!hExplorerWnd)
                return;

            DWORD dwExplorerProcessId;
            GetWindowThreadProcessId(hExplorerWnd, &dwExplorerProcessId);

            PROCESS_BASIC_INFORMATION ProcessInfo;
            status = pfnNtQueryInformationProcess(
                GetCurrentProcess(),
                ProcessBasicInformation,
                &ProcessInfo,
                sizeof(ProcessInfo),
                NULL);
            if ((DWORD)ProcessInfo.InheritedFromUniqueProcessId != dwExplorerProcessId)
                isDebugged = true;
            return;
        }
    }
}