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Understanding the Problem:

One FortiGate device is generating a significantly higher volume of logs compared to other devices, causing the ADOM to exceed its storage quota.

This can lead to performance issues and difficulties in managing logs effectively within FortiAnalyzer.

Possible Solutions:

The goal is to manage the volume of logs and ensure that the ADOM does not exceed its quota, while still maintaining effective log analysis and monitoring.

Solution A: Increase the Storage Space Quota for the First FortiGate Device:

While increasing the storage space quota might provide a temporary relief, it does not address the root cause of the issue, which is the excessive log volume.

This solution might not be sustainable in the long term as log volume could continue to grow.

Not selected as it does not provide a long-term, efficient solution.

Solution B: Create a Separate ADOM for the First FortiGate Device and Configure a Different Set of Storage Policies:

Creating a separate ADOM allows for tailored storage policies and management specifically for the high-log-volume device.

This can help in distributing the storage load and applying more stringent or customized retention and storage policies.

Selected as it effectively manages the storage and organization of logs.

Solution C: Reconfigure the First FortiGate Device to Reduce the Number of Logs it Forwards to FortiAnalyzer:

By adjusting the logging settings on the FortiGate device, you can reduce the volume of logs forwarded to FortiAnalyzer.

This can include disabling unnecessary logging, reducing the logging level, or filtering out less critical logs.

Selected as it directly addresses the issue of excessive log volume.

Solution D: Configure Data Selectors to Filter the Data Sent by the First FortiGate Device:

Data selectors can be used to filter the logs sent to FortiAnalyzer, ensuring only relevant logs are forwarded.

This can help in reducing the volume of logs but might require detailed configuration and regular updates to ensure critical logs are not missed.

Not selected as it might not be as effective as reconfiguring logging settings directly on the FortiGate device.

Implementation Steps:

For Solution B:

Step 1: Access FortiAnalyzer and navigate to the ADOM management section.

Step 2: Create a new ADOM for the high-log-volume FortiGate device.

Step 3: Register the FortiGate device to this new ADOM.

Step 4: Configure specific storage policies for the new ADOM to manage log retention and storage.

For Solution C:

Step 1: Access the FortiGate device’s configuration interface.

Step 2: Navigate to the logging settings.

Step 3: Adjust the logging level and disable unnecessary logs.

Step 4: Save the configuration and monitor the log volume sent to FortiAnalyzer.

References:

Fortinet Documentation on FortiAnalyzer ADOMs and log management FortiAnalyzer Administration Guide

Fortinet Knowledge Base on configuring log settings on FortiGate FortiGate Logging Guide

By creating a separate ADOM for the high-log-volume FortiGate device and reconfiguring its logging settings, you can effectively manage the log volume and ensure the ADOM does not exceed its quota.

Understanding the MITRE ATT&CK Tactics:

The MITRE ATT&CK framework categorizes various tactics and techniques used by adversaries to achieve their objectives.

Tactics represent the objectives of an attack, while techniques represent how those objectives are achieved.

Analyzing the Incident Report:

Phishing Email Campaign:This tactic is commonly used for gaining initial access to a system.

Malicious Link and RAT Download:Clicking a malicious link and downloading a RAT is indicative of establishing initial access.

Remote Access Trojan (RAT):Once installed, the RAT allows attackers to maintain access over an extended period, which is a persistence tactic.

Mapping to MITRE ATT&CK Tactics:

Initial Access:

This tactic covers techniques used to gain an initial foothold within a network.

Techniques include phishing and exploiting external remote services.

The phishing campaign and malicious link click fit this category.

Persistence:

This tactic includes methods that adversaries use to maintain their foothold.

Techniques include installing malware that can survive reboots and persist on the system.

The RAT provides persistent remote access, fitting this tactic.

Exclusions:

Defense Evasion:

This involves techniques to avoid detection and evade defenses.

While potentially relevant in a broader context, the incident report does not specifically describe actions taken to evade defenses.

Lateral Movement:

This involves moving through the network to other systems.

The report does not indicate actions beyond initial access and maintaining that access.

Conclusion:

The incident report captures the tactics ofInitial AccessandPersistence.

References:

MITRE ATT&CK Framework documentation on Initial Access and Persistence tactics.

Incident analysis and mapping to MITRE ATT&CK tactics.

Understanding the MITRE ATT&CK Framework:

The MITRE ATT&CK framework is a comprehensive matrix of tactics and techniques used by adversaries to achieve their objectives.

It is widely used for understanding adversary behavior, improving defense strategies, and conducting security assessments.

Analyzing the Options:

Option A:The framework provides detailed technical descriptions of adversary activities, including specific techniques and subtechniques.

Option B:The framework includes information about mitigations and detections for each technique and subtechnique, providing comprehensive guidance.

Option C:MITRE ATT&CK covers a wide range of attack vectors, including those targeting user endpoints, network devices, and servers.

Option D:Some techniques or subtechniques do indeed fall under multiple tactics, reflecting the complex nature of adversary activities that can serve different objectives.

Conclusion:

The statement that best describes the MITRE ATT&CK framework is that it contains some techniques or subtechniques that fall under more than one tactic.

References:

MITRE ATT&CK Framework Documentation.

Security Best Practices and Threat Intelligence Reports Utilizing MITRE ATT&CK.

Understanding FortiAnalyzer Data Policy and Disk Utilization:

FortiAnalyzer uses data policies to manage log storage, retention, and disk utilization.

The Data Policy section indicates how long logs are kept for analytics and archive purposes.

The Disk Utilization section specifies the allocated disk space and the proportions used for analytics and archive, as well as when alerts should be triggered based on disk usage.

Analyzing the Provided Exhibit:

Keep Logs for Analytics:60 Days

Keep Logs for Archive:120 Days

Disk Allocation:300 GB (with a maximum of 441 GB available)

Analytics: Archive Ratio:30% : 70%

Alert and Delete When Usage Reaches:90%

Potential Problems Identification:

Disk Space Allocation:The allocated disk space is 300 GB out of a possible 441 GB, which might not be insufficient if the log volume is high, but it is not the primary concern based on the given data.

Analytics-to-Archive Ratio:The ratio of 30% for analytics and 70% for archive is unconventional. Typically, a higher percentage is allocated for analytics since real-time or recent data analysis is often prioritized. A common configuration might be a 70% analytics and 30% archive ratio. The misconfigured ratio can lead to insufficient space for analytics, causing issues with real-time monitoring and analysis.

Retention Periods:While the retention periods could be seen as lengthy, they are not necessarily indicative of a problem without knowing the specific log volume and compliance requirements. The length of these periods can vary based on organizational needs and legal requirements.

Conclusion:

Based on the analysis, the primary issue observed is theanalytics-to-archive ratiobeing misconfigured. This misconfiguration can significantly impact the effectiveness of the FortiAnalyzer in real-time log analysis, potentially leading to delayed threat detection and response.

References:

Fortinet Documentation on FortiAnalyzer Data Policies and Disk Management.

Best Practices for FortiAnalyzer Log Management and Disk Utilization.

Understanding FortiAnalyzer Fabric Topology:

The FortiAnalyzer Fabric topology is designed to centralize logging and analysis across multiple devices in a network.

It involves a hierarchy where the supervisor node manages and coordinates with other Fabric members.

Analyzing the Options:

Option A:Downstream collectors forwarding logs to Fabric members is not a typical configuration. Instead, logs are usually centralized to the supervisor.

Option B:For effective management and log centralization, logging devices must be registered to the supervisor. This ensures proper log collection and coordination.

Option C:The supervisor does not primarily use an API to store logs, incidents, and events locally. Logs are stored directly in the FortiAnalyzer database.

Option D:For the Fabric topology to function correctly, all Fabric members need to be in analyzer mode. This mode allows them to collect, analyze, and forward logs appropriately within the topology.

Conclusion:

The correct statements regarding the FortiAnalyzer Fabric topology are that logging devices must be registered to the supervisor and that Fabric members must be in analyzer mode.

References:

Fortinet Documentation on FortiAnalyzer Fabric Topology.

Best Practices for Configuring FortiAnalyzer in a Fabric Environment.

Understanding the Playbook Requirements:

The SOC analyst needs to design a playbook that filters for high severity events.

The playbook must also attach the event information to an existing incident.

Analyzing the Provided Exhibit:

The exhibit shows the available actions for a local connector within the playbook.

Actions listed include:

Update Asset and Identity

Get Events

Get Endpoint Vulnerabilities

Create Incident

Update Incident

Attach Data to Incident

Run Report

Get EPEU from Incident

Evaluating the Options:

Get Events:This action retrieves events but does not attach them to an incident.

Update Incident:This action updates an existing incident but is not specifically for attaching event data.

Update Asset and Identity:This action updates asset and identity information, not relevant for attaching event data to an incident.

Attach Data to Incident:This action is explicitly designed to attach additional data, such as event information, to an existing incident.

Conclusion:

The correct action to use in the playbook for filtering high severity events and attaching the event information to an incident isAttach Data to Incident.

References:

Fortinet Documentation on Playbook Actions and Connectors.

Best Practices for Incident Management and Playbook Design in SOC Operations.

Understanding the Custom Event Handler Configuration:

The event handler is set up to generate events based on specific log data.

The goal is to generate events specifically for spam emails detected by FortiMail.

Analyzing the Issue:

The event handler is currently generating events for both spam emails and clean emails.

This indicates that the rule's filtering criteria are not correctly distinguishing between spam and non-spam emails.

Evaluating the Options:

Option A:Selecting the "Anti-Spam Log (spam)" in the Log Type field will ensure that only logs related to spam emails are considered. This is the most straightforward and accurate way to filter for spam emails.

Option B:Typingtype==spamin the Log filter by Text field might help filter the logs, but it is not as direct and reliable as selecting the correct log type.

Option C:Disabling the rule to use the filter in the data selector to create the event does not address the issue of filtering for spam logs specifically.

Option D:Selecting "Within a group, the log field Spam Name (snane) has 2 or more unique values" is not directly relevant to filtering spam logs and could lead to incorrect filtering criteria.

Conclusion:

The correct change to make in the rule is to select "Anti-Spam Log (spam)" in the Log Type field. This ensures that the event handler only generates events for spam emails.

References:

Fortinet Documentation on Event Handlers and Log Types.

Best Practices for Configuring FortiMail Anti-Spam Settings.

Understanding the Issue:

The custom event handler for detecting SMTP reconnaissance activities is generating a large number of events.

This high volume of events is overwhelming the notification system, leading to potential alert fatigue and inefficiency in incident response.

Event Handler Configuration:

Event handlers are configured to trigger alerts based on specific criteria.

The frequency and volume of these alerts can be controlled by adjusting the trigger conditions.

Possible Solutions:

A. Increase the trigger count so that it identifies and reduces the count triggered by a particular group:

By increasing the trigger count, you ensure that the event handler only generates alerts after a higher threshold of activity is detected.

This reduces the number of events generated and helps prevent overwhelming the notification system.

Selected as it effectively manages the volume of generated events.

B. Disable the custom event handler because it is not working as expected:

Disabling the event handler is not a practical solution as it would completely stop monitoring for SMTP reconnaissance activities.

Not selected as it does not address the issue of fine-tuning the event generation.

C. Decrease the time range that the custom event handler covers during the attack:

Reducing the time range might help in some cases, but it could also lead to missing important activities if the attack spans a longer period.

Not selected as it could lead to underreporting of significant events.

D. Increase the log field value so that it looks for more unique field values when it creates the event:

Adjusting the log field value might refine the event criteria, but it does not directly control the volume of alerts.

Not selected as it is not the most effective way to manage event volume.

Implementation Steps:

Step 1: Access the event handler configuration in FortiAnalyzer.

Step 2: Locate the trigger count setting within the custom event handler for SMTP reconnaissance.

Step 3: Increase the trigger count to a higher value that balances alert sensitivity and volume.

Step 4: Save the configuration and monitor the event generation to ensure it aligns with expected levels.

Conclusion:

By increasing the trigger count, you can effectively reduce the number of events generated by the custom event handler, preventing the notification system from being overwhelmed.

References:

Fortinet Documentation on Event Handlers and Configuration FortiAnalyzer Administration Guide

Best Practices for Event Management Fortinet Knowledge Base

By increasing the trigger count in the custom event handler, you can manage the volume of generated events and prevent the notification system from being overwhelmed.

Overview of Automation Stitches:

Automation stitches in FortiAnalyzer are predefined sets of automated actions triggered by specific events. These actions help in automating responses to security incidents, improving efficiency, and reducing the response time.

FortiAnalyzer Connectors:

FortiAnalyzer integrates with various Fortinet products and other third-party solutions through connectors. These connectors facilitate communication and data exchange, enabling centralized management and automation.

Available Connectors for Automation Stitches:

FortiCASB:

FortiCASB is a Cloud Access Security Broker that helps secure SaaS applications. However, it is not typically used for running automation stitches within FortiAnalyzer.