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‎IAT_hook_example.sln‎

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Microsoft Visual Studio Solution File, Format Version 12.00
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# Visual Studio Version 17
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VisualStudioVersion = 17.0.32014.148
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MinimumVisualStudioVersion = 10.0.40219.1
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Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "IAT_hook_example", "IAT_hook_example.vcxproj", "{A1E952BD-FE96-4A4C-BB47-4343CBFD56E2}"
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EndProject
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Global
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GlobalSection(SolutionConfigurationPlatforms) = preSolution
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Debug|x64 = Debug|x64
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Debug|x86 = Debug|x86
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Release|x64 = Release|x64
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Release|x86 = Release|x86
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EndGlobalSection
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GlobalSection(ProjectConfigurationPlatforms) = postSolution
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{A1E952BD-FE96-4A4C-BB47-4343CBFD56E2}.Debug|x64.ActiveCfg = Debug|x64
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{A1E952BD-FE96-4A4C-BB47-4343CBFD56E2}.Debug|x64.Build.0 = Debug|x64
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{A1E952BD-FE96-4A4C-BB47-4343CBFD56E2}.Debug|x86.ActiveCfg = Debug|Win32
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{A1E952BD-FE96-4A4C-BB47-4343CBFD56E2}.Debug|x86.Build.0 = Debug|Win32
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{A1E952BD-FE96-4A4C-BB47-4343CBFD56E2}.Release|x64.ActiveCfg = Release|x64
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{A1E952BD-FE96-4A4C-BB47-4343CBFD56E2}.Release|x64.Build.0 = Release|x64
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{A1E952BD-FE96-4A4C-BB47-4343CBFD56E2}.Release|x86.ActiveCfg = Release|Win32
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{A1E952BD-FE96-4A4C-BB47-4343CBFD56E2}.Release|x86.Build.0 = Release|Win32
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EndGlobalSection
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GlobalSection(SolutionProperties) = preSolution
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HideSolutionNode = FALSE
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EndGlobalSection
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GlobalSection(ExtensibilityGlobals) = postSolution
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SolutionGuid = {2A5317A6-D293-411A-8C1C-10D9E5DA29FE}
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EndGlobalSection
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EndGlobal

‎IAT_hook_example.vcxproj‎

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<?xml version="1.0" encoding="utf-8"?>
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<Project DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
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<ItemGroup Label="ProjectConfigurations">
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<ProjectConfiguration Include="Debug|Win32">
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<Configuration>Debug</Configuration>
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<Platform>Win32</Platform>
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</ProjectConfiguration>
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<ProjectConfiguration Include="Release|Win32">
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<Configuration>Release</Configuration>
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<Platform>Win32</Platform>
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</ProjectConfiguration>
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<ProjectConfiguration Include="Debug|x64">
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<Configuration>Debug</Configuration>
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<Platform>x64</Platform>
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</ProjectConfiguration>
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<ProjectConfiguration Include="Release|x64">
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<Configuration>Release</Configuration>
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<Platform>x64</Platform>
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</ProjectConfiguration>
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</ItemGroup>
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<PropertyGroup Label="Globals">
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<VCProjectVersion>16.0</VCProjectVersion>
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<Keyword>Win32Proj</Keyword>
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<ProjectGuid>{a1e952bd-fe96-4a4c-bb47-4343cbfd56e2}</ProjectGuid>
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<RootNamespace>IAThookexample</RootNamespace>
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<WindowsTargetPlatformVersion>10.0</WindowsTargetPlatformVersion>
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</PropertyGroup>
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<Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
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<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
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<ConfigurationType>Application</ConfigurationType>
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<UseDebugLibraries>true</UseDebugLibraries>
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<PlatformToolset>v143</PlatformToolset>
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<CharacterSet>Unicode</CharacterSet>
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</PropertyGroup>
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<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
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<ConfigurationType>Application</ConfigurationType>
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<UseDebugLibraries>false</UseDebugLibraries>
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<PlatformToolset>v143</PlatformToolset>
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<WholeProgramOptimization>true</WholeProgramOptimization>
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<CharacterSet>Unicode</CharacterSet>
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</PropertyGroup>
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<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
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<ConfigurationType>Application</ConfigurationType>
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<UseDebugLibraries>true</UseDebugLibraries>
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<PlatformToolset>v143</PlatformToolset>
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<CharacterSet>Unicode</CharacterSet>
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</PropertyGroup>
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<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
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<ConfigurationType>Application</ConfigurationType>
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<UseDebugLibraries>false</UseDebugLibraries>
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<PlatformToolset>v143</PlatformToolset>
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<WholeProgramOptimization>true</WholeProgramOptimization>
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<CharacterSet>Unicode</CharacterSet>
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</PropertyGroup>
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<Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
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<ImportGroup Label="ExtensionSettings">
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</ImportGroup>
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<ImportGroup Label="Shared">
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</ImportGroup>
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<ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
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<Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
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</ImportGroup>
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<ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
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<Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
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</ImportGroup>
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<ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
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<Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
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</ImportGroup>
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<ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
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<Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
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</ImportGroup>
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<PropertyGroup Label="UserMacros" />
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<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
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<LinkIncremental>true</LinkIncremental>
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</PropertyGroup>
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<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
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<LinkIncremental>false</LinkIncremental>
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</PropertyGroup>
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<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
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<LinkIncremental>true</LinkIncremental>
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</PropertyGroup>
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<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
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<LinkIncremental>false</LinkIncremental>
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</PropertyGroup>
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<ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
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<ClCompile>
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<WarningLevel>Level3</WarningLevel>
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<SDLCheck>true</SDLCheck>
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<PreprocessorDefinitions>WIN32;_DEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
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<ConformanceMode>true</ConformanceMode>
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</ClCompile>
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<Link>
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<SubSystem>Console</SubSystem>
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<GenerateDebugInformation>true</GenerateDebugInformation>
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</Link>
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</ItemDefinitionGroup>
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<ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
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<ClCompile>
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<WarningLevel>Level3</WarningLevel>
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<FunctionLevelLinking>true</FunctionLevelLinking>
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<IntrinsicFunctions>true</IntrinsicFunctions>
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<SDLCheck>true</SDLCheck>
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<PreprocessorDefinitions>WIN32;NDEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
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<ConformanceMode>true</ConformanceMode>
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</ClCompile>
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<Link>
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<SubSystem>Console</SubSystem>
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<EnableCOMDATFolding>true</EnableCOMDATFolding>
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<OptimizeReferences>true</OptimizeReferences>
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<GenerateDebugInformation>true</GenerateDebugInformation>
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</Link>
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</ItemDefinitionGroup>
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<ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
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<ClCompile>
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<WarningLevel>Level3</WarningLevel>
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<SDLCheck>true</SDLCheck>
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<PreprocessorDefinitions>_DEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
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<ConformanceMode>true</ConformanceMode>
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</ClCompile>
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<Link>
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<SubSystem>Console</SubSystem>
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<GenerateDebugInformation>true</GenerateDebugInformation>
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</Link>
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</ItemDefinitionGroup>
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<ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
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<ClCompile>
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<WarningLevel>Level3</WarningLevel>
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<FunctionLevelLinking>true</FunctionLevelLinking>
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<IntrinsicFunctions>true</IntrinsicFunctions>
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<SDLCheck>true</SDLCheck>
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<PreprocessorDefinitions>NDEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
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<ConformanceMode>true</ConformanceMode>
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</ClCompile>
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<Link>
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<SubSystem>Console</SubSystem>
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<EnableCOMDATFolding>true</EnableCOMDATFolding>
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<OptimizeReferences>true</OptimizeReferences>
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<GenerateDebugInformation>true</GenerateDebugInformation>
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</Link>
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</ItemDefinitionGroup>
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<ItemGroup>
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<ClCompile Include="main.cpp" />
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</ItemGroup>
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<Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
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<ImportGroup Label="ExtensionTargets">
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</ImportGroup>
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</Project>

‎IAT_hook_example.vcxproj.filters‎

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<?xml version="1.0" encoding="utf-8"?>
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<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
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<ItemGroup>
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<Filter Include="Source Files">
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<UniqueIdentifier>{4FC737F1-C7A5-4376-A066-2A32D752A2FF}</UniqueIdentifier>
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<Extensions>cpp;c;cc;cxx;c++;cppm;ixx;def;odl;idl;hpj;bat;asm;asmx</Extensions>
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</Filter>
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<Filter Include="Header Files">
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<UniqueIdentifier>{93995380-89BD-4b04-88EB-625FBE52EBFB}</UniqueIdentifier>
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<Extensions>h;hh;hpp;hxx;h++;hm;inl;inc;ipp;xsd</Extensions>
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</Filter>
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<Filter Include="Resource Files">
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<UniqueIdentifier>{67DA6AB6-F800-4c08-8B7A-83BB121AAD01}</UniqueIdentifier>
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<Extensions>rc;ico;cur;bmp;dlg;rc2;rct;bin;rgs;gif;jpg;jpeg;jpe;resx;tiff;tif;png;wav;mfcribbon-ms</Extensions>
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</Filter>
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</ItemGroup>
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<ItemGroup>
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<ClCompile Include="main.cpp">
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<Filter>Source Files</Filter>
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</ClCompile>
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</ItemGroup>
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</Project>

‎main.cpp‎

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#include <Windows.h>
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#include <iostream>
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typedef void(__stdcall* TrueSleep)(DWORD);
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TrueSleep oSleep;
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void __stdcall MySleep(DWORD dwMilliseconds)
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{
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printf("HOOKED SLEEP!!!\n");
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printf("Sleep for: %d milliseconds\n", dwMilliseconds);
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oSleep(dwMilliseconds);
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}
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bool HookIAT(const char* module_name, const char* func_name, void* new_func, void** old_func)
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{
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DWORD module_base = (DWORD)GetModuleHandleA(NULL);
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IMAGE_DOS_HEADER* dos_header = (IMAGE_DOS_HEADER*)module_base;
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IMAGE_NT_HEADERS32* pe_header = (IMAGE_NT_HEADERS32*)(module_base + dos_header->e_lfanew);
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if (pe_header->Signature != IMAGE_NT_SIGNATURE)
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return false;
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// grab the pointer to the import data directory
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IMAGE_IMPORT_DESCRIPTOR* import_descriptor = (IMAGE_IMPORT_DESCRIPTOR*)(module_base + pe_header->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_IMPORT].VirtualAddress);
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for (DWORD i = 0; import_descriptor[i].Characteristics != 0; ++i)
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{
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char* dll_name = (char*)(module_base + import_descriptor[i].Name);
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if (_strcmpi(dll_name, module_name) != 0)
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continue;
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if (!import_descriptor[i].FirstThunk || !import_descriptor[i].OriginalFirstThunk)
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return false;
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IMAGE_THUNK_DATA32* thunk = (IMAGE_THUNK_DATA32*)(module_base + import_descriptor[i].FirstThunk);
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IMAGE_THUNK_DATA32* orig_thunk = (IMAGE_THUNK_DATA32*)(module_base + import_descriptor[i].OriginalFirstThunk);
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for (; orig_thunk->u1.Function != 0; ++thunk, ++orig_thunk)
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{
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if (orig_thunk->u1.Ordinal & IMAGE_ORDINAL_FLAG32)
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continue;
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IMAGE_IMPORT_BY_NAME* _import = (IMAGE_IMPORT_BY_NAME*)(module_base + orig_thunk->u1.AddressOfData);
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if (_strcmpi(func_name, (char*)_import->Name) != 0)
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continue;
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DWORD junk;
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MEMORY_BASIC_INFORMATION mbi;
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VirtualQuery(thunk, &mbi, sizeof(MEMORY_BASIC_INFORMATION));
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if (!VirtualProtect(mbi.BaseAddress, mbi.RegionSize, PAGE_EXECUTE_READWRITE, &mbi.Protect))
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return false;
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*old_func = (void*)thunk->u1.Function;
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thunk->u1.Function = (DWORD)new_func;
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if (VirtualProtect(mbi.BaseAddress, mbi.RegionSize, mbi.Protect, &junk))
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return true;
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}
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}
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return false;
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}
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int main()
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{
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if (!HookIAT("kernel32.dll", "Sleep", &MySleep, (void**)&oSleep))
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printf("[-] hooking failed, error = %d\n", GetLastError());
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else
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{
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printf("[+] old_addr = 0x%p, new_addr = 0x%p\n", oSleep, &MySleep);
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Sleep(1000);
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}
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}

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