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‎BasicChromeDriverDetectionPatch.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 = 17.0.32112.339
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MinimumVisualStudioVersion = 10.0.40219.1
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Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "BasicChromeDriverDetectionPatch", "BasicChromeDriverDetectionPatch\BasicChromeDriverDetectionPatch.csproj", "{F248F80C-4F89-4BFF-AD5B-5094E712C1BA}"
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EndProject
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Global
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GlobalSection(SolutionConfigurationPlatforms) = preSolution
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Debug|Any CPU = Debug|Any CPU
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Release|Any CPU = Release|Any CPU
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EndGlobalSection
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GlobalSection(ProjectConfigurationPlatforms) = postSolution
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{F248F80C-4F89-4BFF-AD5B-5094E712C1BA}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
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{F248F80C-4F89-4BFF-AD5B-5094E712C1BA}.Debug|Any CPU.Build.0 = Debug|Any CPU
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{F248F80C-4F89-4BFF-AD5B-5094E712C1BA}.Release|Any CPU.ActiveCfg = Release|Any CPU
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{F248F80C-4F89-4BFF-AD5B-5094E712C1BA}.Release|Any CPU.Build.0 = Release|Any CPU
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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 = {2DAE7423-1720-4CA5-8221-DE10E977E833}
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EndGlobalSection
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EndGlobal

‎BasicChromeDriverDetectionPatch/BasicChromeDriverDetectionPatch.csproj‎

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<Project Sdk="Microsoft.NET.Sdk">
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<PropertyGroup>
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<OutputType>Exe</OutputType>
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<TargetFramework>net6.0-windows</TargetFramework>
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<ImplicitUsings>enable</ImplicitUsings>
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<Nullable>enable</Nullable>
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<DebugType>none</DebugType>
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<BaseOutputPath>..\.build\bin\</BaseOutputPath>
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<BaseIntermediateOutputPath>..\.build\obj\</BaseIntermediateOutputPath>
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<ErrorReport>none</ErrorReport>
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<NeutralLanguage>en-US</NeutralLanguage>
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<StartupObject>BasicChromeDriverDetectionPatch.Program</StartupObject>
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<ProduceReferenceAssembly>False</ProduceReferenceAssembly>
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<Authors>Plot</Authors>
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<RepositoryType>git</RepositoryType>
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<Description>A tool that patches the ChromeDriver binary to avert a "basic" bot detection method used by most anti-automation services.</Description>
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<PackageProjectUrl>https://github.com/Plot1337/BasicChromeDriverDetectionPatch</PackageProjectUrl>
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<RepositoryUrl>https://github.com/Plot1337/BasicChromeDriverDetectionPatch</RepositoryUrl>
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<PackageLicenseFile>..\LICENSE</PackageLicenseFile>
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<PackageTags>bot; chrome; automation; csharp; dotnet; selenium; chromedriver; patch; selenium-webdriver; undetected; undetectable</PackageTags>
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</PropertyGroup>
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<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|AnyCPU'">
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<CheckForOverflowUnderflow>True</CheckForOverflowUnderflow>
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</PropertyGroup>
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<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|AnyCPU'">
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<CheckForOverflowUnderflow>True</CheckForOverflowUnderflow>
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</PropertyGroup>
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</Project>

‎BasicChromeDriverDetectionPatch/BinHelper.cs‎

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namespace BasicChromeDriverDetectionPatch
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{
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internal class BinHelper
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{
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public static List<int> FindOffsets(byte[]? source, byte[] find)
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{
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if (source == null)
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throw new ArgumentNullException(nameof(source));
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var result = new List<int>();
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int matchIndex = 0;
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for (int i = 0; i < source.Length; i++)
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{
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if (source[i] == find[matchIndex])
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{
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if (matchIndex == (find.Length - 1))
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{
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result.Add(i - matchIndex);
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continue;
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}
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matchIndex++;
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}
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else if (source[i] == find[0]) matchIndex = 1;
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else matchIndex = 0;
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}
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return result;
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}
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public static byte[] Replace(byte[] source, byte[] search, byte[] replace)
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{
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byte[]? dst = null;
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byte[]? temp = null;
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var offsets = FindOffsets(source, search);
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foreach (var index in offsets)
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{
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temp = temp == null ? source : (dst ?? source);
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dst = new byte[temp.Length - search.Length + replace.Length];
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Buffer.BlockCopy(temp, 0, dst, 0, index);
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Buffer.BlockCopy(replace, 0, dst, index, replace.Length);
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Buffer.BlockCopy(
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temp,
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index + search.Length,
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dst,
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index + replace.Length,
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temp.Length - (index + search.Length));
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}
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return dst ?? source;
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}
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}
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}

‎BasicChromeDriverDetectionPatch/Program.cs‎

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using System.Text;
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namespace BasicChromeDriverDetectionPatch
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{
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internal class Program
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{
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static byte[]? Data;
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static void Main(string[] args)
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{
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Console.Title =
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"Basic ChromeDriver Detection Patch - Plot <github.com/Plot1337>";
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if (args.Length == 0)
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ErrorExit(
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"Usage: [current exe] [path to chromedriver.exe]"
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);
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string path = args[0];
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try
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{
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Console.WriteLine($"Attempting to load... ({path})");
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Data = File.ReadAllBytes(path);
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Console.WriteLine("Loaded EXE bin into memory!");
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var ids = GetCdcIds();
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if (ids.Count == 0)
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ErrorExit("No IDs found! Perhaps the EXE is already patched?");
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Console.WriteLine($"Found {ids.Count} IDs! Replacing with alts...");
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byte[] AsciiStr(string str) =>
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Encoding.ASCII.GetBytes(str);
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foreach (var id in ids)
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{
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string alt = RandomString();
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Data = BinHelper.Replace(
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Data,
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AsciiStr(id),
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AsciiStr(alt)
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);
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Console.WriteLine($"{id} -> {alt}");
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}
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string patchedFilePath = path.Replace(".exe", "_patched.exe");
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File.WriteAllBytes(patchedFilePath, Data);
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Console.WriteLine("Saved to: " + patchedFilePath);
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}
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catch (FileNotFoundException) { ErrorExit("Chromedriver EXE not found!"); }
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catch (Exception ex) { ErrorExit(ex.ToString()); }
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Exit();
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}
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static List<string> GetCdcIds()
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{
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Console.WriteLine("Finding CDC ids...");
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if (Data == null)
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throw new ArgumentNullException(nameof(Data));
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int idLen = 26;
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var result = new List<string>();
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// "cdc_" as bytes
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byte[] searchArr = {
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0x63, 0x64, 0x63, 0x5F
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};
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var offsets = BinHelper.FindOffsets(Data, searchArr);
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foreach (var offset in offsets)
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{
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var idBytes = Data.Skip(offset).Take(idLen).ToArray();
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string id = Encoding.UTF8.GetString(idBytes);
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result.Add(id);
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Console.WriteLine($"{offset}: {id}");
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}
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return result.Distinct().ToList();
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}
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static string RandomString(int length = 26)
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{
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var random = new Random();
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string chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
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return new string(
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Enumerable.Repeat(chars, length).Select(
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i => i[random.Next(i.Length)]
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).ToArray()
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);
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}
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static void ErrorExit(string message)
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{
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Console.ForegroundColor = ConsoleColor.Red;
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Console.WriteLine(message);
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Console.ForegroundColor = ConsoleColor.White;
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Exit();
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}
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static void Exit()
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{
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Console.WriteLine("Press any key to exit...");
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Console.ReadKey(true);
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Environment.Exit(0);
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}
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}
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}

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