public static string Decrypt(AgentCheckin taskResponse) { byte[] password = Encoding.UTF8.GetBytes(taskResponse.Agent.AesPassword); byte[] iv = Convert.FromBase64String(taskResponse.IV); byte[] hmac = Convert.FromBase64String(taskResponse.HMAC); string message = taskResponse.Message; return(Decrypt(iv, password, message, hmac)); }
public async Task Handle(NewAgentCheckin agentCheckinMsg, string replyTo, string correlationId) { Console.WriteLine($"[i] Got AgentCheckin Message."); Transport transport = _taskRepository.GetTransport(agentCheckinMsg.TransportId); // Check in agent Agent agent = _taskRepository.GetAgent(agentCheckinMsg.AgentName); agent.TransportId = agentCheckinMsg.TransportId; agent.ExternalIp = agentCheckinMsg.SourceIp; agent.LastCheckin = DateTime.UtcNow; if (!agent.Visible) { agent.Visible = true; AgentUpdated update = new AgentUpdated(); update.Success = true; update.Agent = agent; _eventBus.Publish(update); } _taskRepository.Update(agent.Id, agent); AgentCheckinAnnouncement agentCheckinAnnouncement = new AgentCheckinAnnouncement(); agentCheckinAnnouncement.Id = agent.Id; agentCheckinAnnouncement.SourceIp = agentCheckinMsg.SourceIp; agentCheckinAnnouncement.TransportId = agentCheckinMsg.TransportId; agentCheckinAnnouncement.TransportName = transport.Name; agentCheckinAnnouncement.Received = agent.LastCheckin.Value; _eventBus.Publish(agentCheckinAnnouncement); // Decode and Decrypt AgentTaskResponse if (!String.IsNullOrEmpty(agentCheckinMsg.Message)) { AgentCheckin agentCheckin = new AgentCheckin(); agentCheckin.SourceIp = agentCheckinMsg.SourceIp; agentCheckin.TransportId = agentCheckinMsg.TransportId; agentCheckin.HMAC = agentCheckinMsg.HMAC; agentCheckin.IV = agentCheckinMsg.IV; agentCheckin.Message = agentCheckinMsg.Message; agentCheckin.AgentId = agent.Id; agentCheckin.Agent = agent; _taskRepository.Add(agentCheckin); // Decrypt Message from Agent string decryptedMessage = Crypto.Decrypt(agentCheckin); Console.WriteLine($"Got response {decryptedMessage}"); if (!agent.Visible) { agent.Visible = true; _taskRepository.Update(agent.Id, agent); } // Process taskResults // TODO: Probably a better way to check if the message is blank. if ((decryptedMessage != "[]") || (!String.IsNullOrEmpty(decryptedMessage))) { List <AgentTaskUpdate> taskUpdates = JsonConvert.DeserializeObject <List <AgentTaskUpdate> >(decryptedMessage); foreach (AgentTaskUpdate taskUpdate in taskUpdates) { taskUpdate.AgentTask = _taskRepository.GetAgentTask(taskUpdate.TaskName); taskUpdate.AgentId = taskUpdate.AgentTask.AgentId; taskUpdate.Received = DateTime.UtcNow; foreach (IOC ioc in taskUpdate.IOCs) { ioc.UserId = taskUpdate.AgentTask.ConsoleMessage.UserId.Value; ioc.AgentTaskUpdateId = taskUpdate.Id; } _taskRepository.Add(taskUpdate); if (taskUpdate.AgentTask.Action == "LOAD" && taskUpdate.Success.Value) { AgentsModulesXref xref = new AgentsModulesXref(); xref.AgentId = taskUpdate.AgentId; string languageName = taskUpdate.Agent.AgentType.Language.Name; string moduleName = taskUpdate.AgentTask.Command.Split(" ")[1]; if (moduleName.Contains("/")) { languageName = moduleName.Split("/")[0]; moduleName = moduleName.Split("/")[1]; } Module loadedModule = _taskRepository.GetModule(moduleName, languageName); xref.ModuleId = loadedModule.Id; _taskRepository.Add(xref); List <Command> loadedCommands = _taskRepository.GetCommands(loadedModule.Id); foreach (Command loadedCommand in loadedCommands) { loadedCommand.Parameters = _taskRepository.GetCommandParameters(loadedCommand.Id); } AgentCommandsUpdated agentCommandsUpdated = new AgentCommandsUpdated(); agentCommandsUpdated.Success = true; agentCommandsUpdated.AgentId = xref.AgentId; agentCommandsUpdated.Commands = loadedCommands; _eventBus.Publish(agentCommandsUpdated); } if (taskUpdate.Type == "File" && !String.IsNullOrEmpty(taskUpdate.Content)) { WebClient wc = new WebClient(); FactionSettings factionSettings = Utility.GetConfiguration(); wc.Headers[HttpRequestHeader.ContentType] = "application/json"; string rsp = wc.UploadString($"{apiUrl}/login/", $"{{\"Username\":\"{factionSettings.SYSTEM_USERNAME}\", \"Password\":\"{factionSettings.SYSTEM_PASSWORD}\"}}"); Dictionary <string, string> responseDict = JsonConvert.DeserializeObject <Dictionary <string, string> >(rsp); wc.Dispose(); string apiKeyName = responseDict["AccessKeyId"]; string apiSecret = responseDict["AccessSecret"]; string uploadUrl = $"{apiUrl}/file/?token={apiKeyName}:{apiSecret}"; Dictionary <string, string> upload = new Dictionary <string, string>(); upload.Add("AgentName", taskUpdate.Agent.Name); upload.Add("FileName", taskUpdate.ContentId); upload.Add("FileContent", taskUpdate.Content); WebClient uploadClient = new WebClient(); uploadClient.Headers[HttpRequestHeader.ContentType] = "application/json"; string content = JsonConvert.SerializeObject(upload); Console.WriteLine(content); string uploadResponse = uploadClient.UploadString(uploadUrl, content); } ConsoleMessage consoleMessage = new ConsoleMessage(); consoleMessage.Agent = taskUpdate.Agent; consoleMessage.Type = "AgentTaskResult"; consoleMessage.AgentTask = taskUpdate.AgentTask; consoleMessage.AgentTaskId = taskUpdate.AgentTask.Id; consoleMessage.Display = taskUpdate.Message; _taskRepository.Add(consoleMessage); ConsoleMessageAnnouncement response = new ConsoleMessageAnnouncement(); response.Success = true; response.Username = consoleMessage.Agent.Name; response.ConsoleMessage = consoleMessage; _eventBus.Publish(response); } } } }