FCSS_SOC_AN-7.4 FCSS - Security Operations 7.4 Analyst Questions and Answers

Understanding the Playbook and its Components:

The exhibit shows the status of a playbook named "DOS attack" and its associated tasks.

The playbook is designed to execute a series of tasks upon detecting a DoS attack event.

Analysis of Playbook Tasks:

Attach_Data_To_Incident:Task ID placeholder_8fab0102, status is "upstream_failed," meaning it did not execute properly due to a previous task's failure.

Get Events:Task ID placeholder_fa2a573c, status is "success."

Create SMTP Enumeration incident:Task ID placeholder_3db75c0a, status is "failed."

Reviewing Raw Logs:

The error log shows aValueError: invalid literal for int() with base 10: '10.200.200.100'.

This error indicates that the task attempted to convert a string (the IP address '10.200.200.100') to an integer, which is not possible.

Identifying the Source of the Error:

The error occurs in the file "incident_operator.py," specifically in theexecutemethod.

This suggests that the task "Create SMTP Enumeration incident" is the one causing the issue because it failed to process the data type correctly.

Conclusion:

The failure of the playbook is due to the "Create SMTP Enumeration incident" task receiving a string value (an IP address) when it expects an integer value. This mismatch in data types leads to the error.

References:

Fortinet Documentation on Playbook and Task Configuration.

Python error handling documentation for understandingValueError.

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.

Understanding FortiAnalyzer Roles:

FortiAnalyzer can operate in two primary modes: collector mode and analyzer mode.

Collector Mode: Gathers logs from various devices and forwards them to another FortiAnalyzer operating in analyzer mode for detailed analysis.

Analyzer Mode: Provides detailed log analysis, reporting, and incident management.

Steps to Configure FortiAnalyzer as a Collector Device:

A. Enable Log Compression:

While enabling log compression can help save storage space, it is not a mandatory step specifically required for configuring FortiAnalyzer in collector mode.

Not selected as it is optional and not directly related to the collector configuration process.

B. Configure Log Forwarding to a FortiAnalyzer in Analyzer Mode:

Essential for ensuring that logs collected by the collector FortiAnalyzer are sent to the analyzer FortiAnalyzer for detailed processing.

Selected as it is a critical step in configuring a FortiAnalyzer as a collector device.

Step 1: Access the FortiAnalyzer interface and navigate to log forwarding settings.

Step 2: Configure log forwarding by specifying the IP address and necessary credentials of the FortiAnalyzer in analyzer mode.

Overview of Indicators of Compromise (IoCs): Indicators of Compromise (IoCs) are pieces of evidence that suggest a system may have been compromised. These can include unusual network traffic patterns, the presence of known malicious files, or other suspicious activities.

FortiAnalyzer's Role: FortiAnalyzer aggregates logs from various Fortinet devices to provide comprehensive visibility and analysis of network events. It uses these logs to identify potential IoCs and compromised hosts.

Relevant Log Types:

DNS Filter Logs:

DNS requests are a common vector for malware communication. Analyzing DNS filter logs helps in identifying suspicious domain queries, which can indicate malware attempting to communicate with command and control (C2) servers.

Understanding Playbook Variables:

Playbook tasks in Security Operations Center (SOC) playbooks use variables to pass and manipulate data between different steps in the automation process.

Variables help in dynamically handling data, making the playbook more flexible and adaptive to different scenarios.

Types of Variables:

Input Variables:

Input variables are used to provide data to a playbook task. These variables can be set manually or derived from previous tasks.

They act as parameters that the task will use to perform its operations.

Output Variables:

Output variables store the result of a playbook task. These variables can then be used as inputs for subsequent tasks.

They capture the outcome of the task's execution, allowing for the dynamic flow of information through the playbook.

Other Options:

Create:Not typically referred to as a type of variable in playbook tasks. It might refer to an action but not a variable type.

Trigger:Refers to the initiation mechanism of the playbook or task (e.g., an event trigger), not a type of variable.

Conclusion:

The two types of variables used in playbook tasks areinputandoutput.

References:

Fortinet Documentation on Playbook Configuration and Variable Usage.

General SOC Automation and Orchestration Practices.

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.