Palo Alto Networks Certified Detection and Remediation Analyst PCDRA Exam Practice Test

Answer : D

Cortex XDR supports Live Terminal for Android systems, which allows you to remotely access and manage Android endpoints using a command-line interface. You can use Live Terminal to run Android commands, such asadb shell,adb logcat,adb install, andadb uninstall. You can also use Live Terminal to view and modify files, directories, and permissions on the Android endpoints. Live Terminal for Android systems does not support stopping an app or running APK scripts.Reference:

Cortex XDR documentation portal

Initiate a Live Terminal Session

Live Terminal Commands

Answer : A

The first protection module that is checked in the Cortex XDR Windows agent malware protection flow is the Hash Verdict Determination. This module compares the hash of the executable file that is about to run on the endpoint with a list of known malicious hashes stored in the Cortex XDR cloud. If the hash matches a malicious hash, the agent blocks the execution and generates an alert.If the hash does not match a malicious hash, the agent proceeds to the next protection module, which is the Restriction Policy1.

The Hash Verdict Determination module is the first line of defense against malware, as it can quickly and efficiently prevent known threats from running on the endpoint. However, this module cannot protect against unknown or zero-day threats, which have no known hash signature.Therefore, the Cortex XDR agent relies on other protection modules, such as Behavioral Threat Protection, Child Process Protection, and Exploit Protection, to detect and block malicious behaviors and exploits that may occur during the execution of the file1.

Palo Alto Networks Cortex XDR Documentation, File Analysis and Protection Flow

Answer : A

To ensure that the same protection is extended to all your servers, you need to create Behavioral Threat Protection (BTP) rules to recognize and prevent the activity. BTP is a feature of Cortex XDR that allows you to create custom rules that detect and block malicious or suspicious behaviors on your endpoints, such as file execution, process injection, network connection, or registry modification. BTP rules can use various operators, functions, and variables to define the criteria and the actions for the rules.By creating BTP rules that match the behaviors of the supply chain attack, you can prevent the attack from compromising your servers12.

Let's briefly discuss the other options to provide a comprehensive explanation:

B) Enable DLL Protection on all servers but there might be some false positives: This is not the correct answer. Enabling DLL Protection on all servers will not ensure that the same protection is extended to all your servers. DLL Protection is a feature of Cortex XDR that allows you to block the execution of unsigned or untrusted DLL files on your endpoints. DLL Protection can help to prevent some types of attacks that use malicious DLL files, but it may not be effective against the supply chain attack that used a Trojanized DLL file that was digitally signed by a trusted vendor.DLL Protection may also cause some false positives, as it may block some legitimate DLL files that are unsigned or untrusted3.

C) Create IOCs of the malicious files you have found to prevent their execution: This is not the correct answer. Creating IOCs of the malicious files you have found will not ensure that the same protection is extended to all your servers. IOCs are indicators of compromise that you can create to detect and respond to known threats on your endpoints, such as file hashes, registry keys, IP addresses, domain names, or full paths. IOCs can help to identify and block the malicious files that you have already discovered, but they may not be effective against the supply chain attack that used different variants of the malicious files with different hashes or names.IOCs may also become outdated, as the attackers may change or update their files to evade detection4.

D) Enable Behavioral Threat Protection (BTP) with cytool to prevent the attack from spreading: This is not the correct answer. Enabling BTP with cytool will not ensure that the same protection is extended to all your servers. BTP is a feature of Cortex XDR that allows you to create custom rules that detect and block malicious or suspicious behaviors on your endpoints, such as file execution, process injection, network connection, or registry modification. BTP rules can help to prevent the attack from spreading, but they need to be created and configured in the Cortex XDR app, not with cytool. Cytool is a command-line tool that allows you to perform various operations on the Cortex XDR agent, such as installing, uninstalling, upgrading, or troubleshooting. Cytool does not have an option to enable or configure BTP rules.

In conclusion, to ensure that the same protection is extended to all your servers, you need to create BTP rules to recognize and prevent the activity. By using BTP rules, you can create custom and flexible prevention rules that match the behaviors of the supply chain attack.

Behavioral Threat Protection

Create a BTP Rule

DLL Protection

Create an IOC Rule

[Cytool]

Answer : B

Live Terminal uses theWebSocketprotocol to communicate with the agent on the endpoint. WebSocket is a full-duplex communication protocol that enables bidirectional data exchange between a client and a server over a single TCP connection. WebSocket is designed to be implemented in web browsers and web servers, but it can be used by any client or server application. WebSocket provides a persistent connection between the Cortex XDR console and the endpoint, allowing you to execute commands and receive responses in real time. Live Terminal uses port 443 for WebSocket communication, which is the same port used for HTTPS traffic.Reference:

Initiate a Live Terminal Session

WebSocket

Answer : D

Cortex XDR Malware Protection Profiles allow you to configure the malware prevention settings for Windows, Linux, and macOS endpoints. You can use SHA256 hash values in the Windows Malware Protection Profile to indicate allowed executables that you want to exclude from malware scanning. This can help you reduce false positives and improve performance by skipping the scanning of known benign files. You can add up to 1000 SHA256 hash values per profile. You cannot use SHA256 hash values in the Linux or macOS Malware Protection Profiles, but you can use other criteria such as file path, file name, or signer to exclude files from scanning.Reference:

Malware Protection Profiles

Configure a Windows Malware Protection Profile

PCDRA Study Guide

Answer : D

To filter the display to only show incidents that were ''starred'', you need to click the star in the widget. This will apply a filter that shows only the incidents that contain a starred alert, which is an alert that matches a specific condition that you define in the incident starring configuration.You can use the incident starring feature to prioritize and focus on the most important or relevant incidents in your environment1.

Let's briefly discuss the other options to provide a comprehensive explanation:

A) Create a custom XQL widget: This is not the correct answer. Creating a custom XQL widget is not necessary to filter the display to only show starred incidents. A custom XQL widget is a widget that you create by using the XQL query language to define the data source and the visualization type.You can use custom XQL widgets to create your own dashboards or reports, but they are not required for filtering incidents by stars2.

B) This is not currently supported: This is not the correct answer. Filtering the display to only show starred incidents is currently supported by Cortex XDR.You can use the star icon in the widget to apply this filter, or you can use the Filter Builder to create a custom filter based on the Starred field1.

C) Create a custom report and filter on starred incidents: This is not the correct answer. Creating a custom report and filtering on starred incidents is not the only way to filter the display to only show starred incidents. A custom report is a report that you create by using the Report Builder to define the data source, the layout, and the schedule.You can use custom reports to generate and share periodic reports on your Cortex XDR data, but they are not the only option for filtering incidents by stars3.

In conclusion, clicking the star in the widget is the simplest and easiest way to filter the display to only show incidents that were ''starred''. By using this feature, you can quickly identify and focus on the most critical or relevant incidents in your environment.

Filter Incidents by Stars

Create a Custom XQL Widget

Create a Custom Report

Answer : C

To ingest external logs from various vendors, you need a Cortex XDR Pro per TB license. This license allows you to collect and analyze logs from Palo Alto Networks and third-party sources, such as firewalls, proxies, endpoints, cloud services, and more. You can use the Log Forwarding app to forward logs from the Logging Service to an external syslog receiver. The Cortex XDR Pro per Endpoint license only supports logs from Cortex XDR agents installed on endpoints. The Cortex XDR Vendor Agnostic Pro and Cortex XDR Cloud per Host licenses do not exist.Reference:

Features by Cortex XDR License Type

Log Forwarding App for Cortex XDR Analytics

SaaS Log Collection