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surajpkhetani avatar surajpkhetani commented on July 24, 2024

I added the below structs from Pinvoke and then utilized them in Locate_Image_Export_Directory function.

[StructLayout(LayoutKind.Explicit)]
        public struct IMAGE_NT_HEADERS32
        {
            [FieldOffset(0)]
            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 2)]
            public char[] Signature;

            [FieldOffset(24)]
            public IMAGE_OPTIONAL_HEADER32 OptionalHeader;
        }

        [StructLayout(LayoutKind.Explicit)]
        public struct IMAGE_OPTIONAL_HEADER32
        {
            [FieldOffset(96)]
            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 16)]
            public IMAGE_DATA_DIRECTORY[] DataDirectory; //public IMAGE_DATA_DIRECTORY ExportTable; in pinvoke.net
        }

Further, while defining NtAllocateVirtualMemory in DelegateFunctions changed data type ulong to int for Allocationtype and Protect as long represent 64 bit unsigned integers. I believe it will also work with uint

        [UnmanagedFunctionPointer(CallingConvention.StdCall)]
        public delegate uint DFNtAllocateVirtualMemory(
            IntPtr ProcessHandle,
            ref IntPtr BaseAddress,
            IntPtr ZeroBits,
            ref IntPtr RegionSize,
            int AllocationType,
            int Protect);

from newntdllbypassinlinehook_csharp.

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