Full Code of zer0condition/ZeroThreadKernel for AI

Repository: zer0condition/ZeroThreadKernel
Branch: master
Commit: 5e69418ff30d
Files: 16
Total size: 37.7 KB

Directory structure:
gitextract_1qo32x91/

├── .gitattributes
├── .gitignore
├── LICENSE
├── README.md
├── ZeroThreadCaller/
│   ├── ZeroThreadCaller.cpp
│   ├── ZeroThreadCaller.vcxproj
│   └── ZeroThreadCaller.vcxproj.filters
├── ZeroThreadKernel/
│   ├── Includes.h
│   ├── ZeroHook/
│   │   ├── ZeroHook.cpp
│   │   └── ZeroHook.h
│   ├── ZeroThreadKernel.cpp
│   ├── ZeroThreadKernel.vcxproj
│   ├── ZeroThreadKernel.vcxproj.filters
│   └── ZeroUtils/
│       ├── ZeroUtils.cpp
│       └── ZeroUtils.h
└── ZeroThreadKernel.sln

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================================================
FILE: LICENSE
================================================
MIT License

Copyright (c) 2023 zer0condition

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.


================================================
FILE: README.md
================================================
<h1>ZeroThreadKernel</h1>
<p>ZeroThreadKernel allows you to execute arbitrary code recursively at kernel-level without a system thread creation.</p>
<h2>How It Works</h2>
<p>It works by hooking a non-KPP protected function exported by the DirectX graphics kernel subsystem (dxgkrnl). The function is called in our user-mode program using the export from win32u.dll, which serves as a thread for recursive code execution.</p>
<h2>Detection</h2>
<p>One way to detect is by integrity checking the .text section of the specified module. Writing our shellcode in the function modifies the original hash of the module. <br> 

Possible circumvention: Hide the hooked driver from the LDR/LoadedModuleList?</p>
<h2>Contributing</h2>
<p>Contributions are always welcome!</p>
<h2>Demo</h2>

![Demo](demo.gif)

---

## Disclaimer

For educational and authorized security research only. Don't use on systems you don't own or have explicit permission to test. I'm not responsible for misuse. Use at your own risk.


================================================
FILE: ZeroThreadCaller/ZeroThreadCaller.cpp
================================================
#include <Windows.h>
#include <iostream>

/* Keep this running, it serves as a "system thread" for the loop in the hook */
#define STARTZEROTHREAD 0x1337

typedef __int64(*NtCreateCompositionSurfaceHandle_t)(__int64 a1, unsigned int a2, unsigned __int64 a3);
NtCreateCompositionSurfaceHandle_t oNtCreateCompositionSurfaceHandle;

int main()
{
    HMODULE hModule = LoadLibraryA("win32u.dll");

    if (hModule) {
        oNtCreateCompositionSurfaceHandle = (NtCreateCompositionSurfaceHandle_t)GetProcAddress(hModule, "NtCreateCompositionSurfaceHandle");
        printf("NtCreateCompositionSurfaceHandle: %p\n", oNtCreateCompositionSurfaceHandle);

        oNtCreateCompositionSurfaceHandle((int)STARTZEROTHREAD, NULL, NULL);

        getchar();
    }
    return 0;
}

================================================
FILE: ZeroThreadCaller/ZeroThreadCaller.vcxproj
================================================
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================================================
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================================================
FILE: ZeroThreadKernel/Includes.h
================================================
#pragma once
#include <ntifs.h>
#include <stdarg.h>
#include <windef.h>

extern "C" NTKERNELAPI PVOID NTAPI RtlFindExportedRoutineByName(PVOID ImageBase, PCCH RoutineName);
extern "C" NTKERNELAPI NTSTATUS ZwQuerySystemInformation(ULONG InfoClass, PVOID Buffer, ULONG Length, PULONG ReturnLength);

#include "ZeroUtils/ZeroUtils.h"
#include "ZeroHook/ZeroHook.h"

================================================
FILE: ZeroThreadKernel/ZeroHook/ZeroHook.cpp
================================================
#include "ZeroHook.h"

BYTE JMPShell[] = {
    /*
    * jmp RIP        ; JMP to RIP
    * dq 0           ; ABS Address
    * dq 0           ; ABS Address
    */

    0xFF, 0x25, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
};

SIZE_T ZeroHook::GetHookSize(PVOID Function)
{
    SIZE_T Length = sizeof(JMPShell);
    while (true) {
        if (*(BYTE*)((PBYTE)Function + Length) == 0x45) break; // 0x45 (MOV)
        if (*(BYTE*)((PBYTE)Function + Length) == 0x48) break; // 0x48 (MOV)
        if (*(BYTE*)((PBYTE)Function + Length) == 0xC3) break; // 0xC3 (RET)
        Length++;
    };
    return Length;
}

PVOID ZeroHook::HookFunction(PVOID OriginalFunction, PVOID HookFunction, SIZE_T* HookLength)
{
    if (!OriginalFunction) {
        Print("[HookFunction] Failed to get function");
        return NULL;
    }

    *HookLength = GetHookSize(OriginalFunction);

    PVOID Trampoline = ExAllocatePool(NonPagedPoolExecute, *HookLength + sizeof(JMPShell));
    if (!Trampoline) {
        Print("[HookFunction] Failed to allocate trampoline");
        return NULL;
    }

    if (!NT_SUCCESS(ZeroUtils::MdlRtlCopyMemory(Trampoline, OriginalFunction, *HookLength))) {
        Print("[HookFunction] Failed to copy function to trampoline");
        ExFreePoolWithTag(Trampoline, 0);
        return NULL;
    }

    *(PBYTE*)&JMPShell[6] = (PBYTE)OriginalFunction + *HookLength;
    if (!NT_SUCCESS(ZeroUtils::MdlRtlCopyMemory((PBYTE)Trampoline + *HookLength, &JMPShell[0], sizeof(JMPShell)))) {
        Print("[HookFunction] Failed to write JMPShell on trampoline");
        ExFreePoolWithTag(Trampoline, 0);
        return NULL;
    }

    *(PBYTE*)&JMPShell[6] = (PBYTE)HookFunction;
    if (!NT_SUCCESS(ZeroUtils::MdlRtlCopyMemory(OriginalFunction, &JMPShell[0], sizeof(JMPShell)))) {
        Print("[HookFunction] Failed to write JMPShell");
        ExFreePoolWithTag(Trampoline, 0);
        return NULL;
    }

    if (sizeof(JMPShell) > *HookLength) { /* NOP the remaining bytes */
        if (!NT_SUCCESS(ZeroUtils::MdlRtlFillMemory((PBYTE)OriginalFunction + sizeof(JMPShell), 0x90 /* (NOP) */, *HookLength - sizeof(JMPShell)))) {
            Print("[HookFunction] Failed to NOP the remaining bytes");
        }
    }

    Print("[HookFunction] Function Hooked");

    return Trampoline;
}

NTSTATUS ZeroHook::UnhookFunction(PVOID Trampoline, PVOID OriginalFunction, SIZE_T HookLength)
{
    if (!NT_SUCCESS(ZeroUtils::MdlRtlCopyMemory(OriginalFunction, Trampoline, HookLength))) {
        Print("[UnhookFunction] Failed to restore original bytes");
        return STATUS_UNSUCCESSFUL;
    }

    ExFreePoolWithTag(Trampoline, 0);

    Print("[UnhookFunction] Function Unhooked");
}

================================================
FILE: ZeroThreadKernel/ZeroHook/ZeroHook.h
================================================
#include "../ZeroUtils/ZeroUtils.h"

namespace ZeroHook
{
    SIZE_T GetHookSize(PVOID Function);
    PVOID HookFunction(PVOID OriginalFunction, PVOID HookFunction, SIZE_T* HookLength);
    NTSTATUS UnhookFunction(PVOID Trampoline, PVOID OriginalFunction, SIZE_T HookLength);
}

================================================
FILE: ZeroThreadKernel/ZeroThreadKernel.cpp
================================================
#include "Includes.h"

#define STARTZEROTHREAD 0x1337

typedef __int64(*NtCreateCompositionSurfaceHandle_t)(__int64 a1, unsigned int a2, unsigned __int64 a3);
NtCreateCompositionSurfaceHandle_t oNtCreateCompositionSurfaceHandle;
NtCreateCompositionSurfaceHandle_t TrampolineNtCreateCompositionSurfaceHandle;
SIZE_T oNtCreateCompositionSurfaceHandleBytes;

int Times = 0;

__int64 __fastcall hkNtCreateCompositionSurfaceHandle(__int64 a1, unsigned int a2, unsigned __int64 a3)
{
	Print("[ZeroThreadKernel] hkNtCreateCompositionSurfaceHandle!");

	if ((int)a1 == (int)STARTZEROTHREAD) /* Sanity check. */
	{
		while (true) {
			Print("[ZeroThreadKernel] %i", Times);
			Times++;

		}
	}

	return TrampolineNtCreateCompositionSurfaceHandle(a1, a2, a3);
}

VOID DriverUnload(PDRIVER_OBJECT DriverObject)
{
	ZeroHook::UnhookFunction((PVOID)TrampolineNtCreateCompositionSurfaceHandle, (PVOID)oNtCreateCompositionSurfaceHandle, oNtCreateCompositionSurfaceHandleBytes);
}

NTSTATUS DriverEntry(PDRIVER_OBJECT DriverObject, PUNICODE_STRING DriverName) 
{
	DriverObject->DriverUnload = DriverUnload;

	/* Store the original  */
	oNtCreateCompositionSurfaceHandle = (NtCreateCompositionSurfaceHandle_t)ZeroUtils::GetKernelModuleExport("dxgkrnl.sys", "NtCreateCompositionSurfaceHandle");
	Print("NtCreateCompositionSurfaceHandle: %p", oNtCreateCompositionSurfaceHandle);

	TrampolineNtCreateCompositionSurfaceHandle = (NtCreateCompositionSurfaceHandle_t)ZeroHook::HookFunction((PVOID)oNtCreateCompositionSurfaceHandle, (PVOID)hkNtCreateCompositionSurfaceHandle, &oNtCreateCompositionSurfaceHandleBytes);

	return STATUS_SUCCESS;
}

================================================
FILE: ZeroThreadKernel/ZeroThreadKernel.vcxproj
================================================
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================================================
FILE: ZeroThreadKernel/ZeroThreadKernel.vcxproj.filters
================================================
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================================================
FILE: ZeroThreadKernel/ZeroUtils/ZeroUtils.cpp
================================================
#include "ZeroUtils.h"

NTSTATUS ZeroUtils::MdlRtlCopyMemory(PVOID Destination, const VOID * Source, SIZE_T Length) {
    PMDL Mdl = IoAllocateMdl(Destination, (ULONG)Length, 0, 0, 0);
    if (!Mdl) return STATUS_UNSUCCESSFUL;

    MmBuildMdlForNonPagedPool(Mdl);
    PVOID Mapped = MmMapLockedPages(Mdl, KernelMode);
    if (!Mapped) {
        IoFreeMdl(Mdl);
        return STATUS_UNSUCCESSFUL;
    }

    KIRQL OldIrql = KeRaiseIrqlToDpcLevel();
    RtlCopyMemory(Mapped, Source, Length);
    KeLowerIrql(OldIrql);

    MmUnmapLockedPages(Mapped, Mdl);
    IoFreeMdl(Mdl);

    return STATUS_SUCCESS;
}

NTSTATUS ZeroUtils::MdlRtlFillMemory(PVOID Destination, BYTE Value, SIZE_T Length) {
    PMDL Mdl = IoAllocateMdl(Destination, Length, 0, 0, 0);
    if (!Mdl) return STATUS_UNSUCCESSFUL;

    MmBuildMdlForNonPagedPool(Mdl);
    PVOID Mapped = (PVOID)MmMapLockedPages(Mdl, KernelMode);
    if (!Mapped) {
        IoFreeMdl(Mdl);
        return STATUS_UNSUCCESSFUL;
    }

    KIRQL OldIrql = KeRaiseIrqlToDpcLevel();
    RtlFillMemory(Mapped, Length, Value);
    KeLowerIrql(OldIrql);

    MmUnmapLockedPages(Mapped, Mdl);
    IoFreeMdl(Mdl);

    return STATUS_SUCCESS;
}

PVOID ZeroUtils::GetKernelModuleExport(const char* ModuleName, const char* FunctionName)
{
    PVOID ModuleBase = 0;

    ULONG Bytes = 0;
    NTSTATUS Status = ZwQuerySystemInformation(SystemModuleInformation, NULL, Bytes, &Bytes);

    if (Bytes == 0) {
        Print("[GetKernelModuleExport] ZwQuerySystemInformation[1] failed");
        return NULL;
    }

    PRTL_PROCESS_MODULES Modules = (PRTL_PROCESS_MODULES)ExAllocatePoolWithTag(NonPagedPool, Bytes, 'NeiH');

    Status = ZwQuerySystemInformation(SystemModuleInformation, Modules, Bytes, &Bytes);

    if (!NT_SUCCESS(Status)) {
        Print("[GetKernelModuleExport] ZwQuerySystemInformation[2] failed");
        return NULL;
    }

    PRTL_PROCESS_MODULE_INFORMATION Module = Modules->Modules;

    for (ULONG i = 0; i < Modules->NumberOfModules; i++)
    {
        if (strcmp((char*)(Module[i].OffsetToFileName + Module[i].FullPathName), ModuleName) == 0)
        {
            ModuleBase = Module[i].ImageBase;
            break;
        }
    }

    if (Modules) {
        ExFreePoolWithTag(Modules, 'NeiH');
    }

    if (ModuleBase == 0) {
        Print("[GetKernelModuleExport] Failed to get module base");
        return NULL;
    }

    return RtlFindExportedRoutineByName(ModuleBase, FunctionName);
}

================================================
FILE: ZeroThreadKernel/ZeroUtils/ZeroUtils.h
================================================
#pragma once
#include "../Includes.h"

#define Print( content, ... ) DbgPrintEx( 0, 0, "[>] " content, __VA_ARGS__ )

namespace ZeroUtils 
{
    NTSTATUS MdlRtlCopyMemory(PVOID Destination, const VOID* Source, SIZE_T Length);
    NTSTATUS MdlRtlFillMemory(PVOID Destination, BYTE Value, SIZE_T Length);
    PVOID GetKernelModuleExport(const char* ModuleName, const char* FunctionName);
}

typedef enum _SYSTEM_INFORMATION_CLASS
{
    SystemBasicInformation,
    SystemProcessorInformation,
    SystemPerformanceInformation,
    SystemTimeOfDayInformation,
    SystemPathInformation,
    SystemProcessInformation,
    SystemCallCountInformation,
    SystemDeviceInformation,
    SystemProcessorPerformanceInformation,
    SystemFlagsInformation,
    SystemCallTimeInformation,
    SystemModuleInformation,
} SYSTEM_INFORMATION_CLASS, * PSYSTEM_INFORMATION_CLASS;

typedef struct _RTL_PROCESS_MODULE_INFORMATION
{
    HANDLE Section;
    PVOID MappedBase;
    PVOID ImageBase;
    ULONG ImageSize;
    ULONG Flags;
    USHORT LoadOrderIndex;
    USHORT InitOrderIndex;
    USHORT LoadCount;
    USHORT OffsetToFileName;
    UCHAR FullPathName[256];
} RTL_PROCESS_MODULE_INFORMATION, * PRTL_PROCESS_MODULE_INFORMATION;

typedef struct _RTL_PROCESS_MODULES
{
    ULONG NumberOfModules;
    RTL_PROCESS_MODULE_INFORMATION Modules[1];
} RTL_PROCESS_MODULES, * PRTL_PROCESS_MODULES;


================================================
FILE: ZeroThreadKernel.sln
================================================

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