Applied Network Defense – YARA for Security Analysts

Applied Network Defense – YARA for Security Analysts
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Learn to use YARA to detect malware, triage compromised systems, and perform threat intelligence research.

Detecting malicious elements within files is a core security skill for incident responders, SOC analysts, threat intelligence analysts, malware analysts, and detection engineers alike. There are different ways to accomplish that goal, but none are more flexible or widely used as YARA.

YARA is a pattern-matching tool used to help identify and classify malware in a variety of scenarios. By writing YARA rules, security practitioners can detect whether malware exists within a group of files, triage a potentially compromised host, or identify common elements between samples to bolster threat intelligence.

The YARA syntax provides a simple and powerful framework for expressing detection logic for file content. Using the YARA executable, you can search for matches based on the rules you write across a single folder or entire system. When you write detection rules for YARA, you can apply those rules in a variety of scenarios and share the rules with your peers in the detection and threat intel communities.

“Most security practitioners should be familiar with the holy trinity of detection. That’s Suricata for network traffic, Sigma for logs, and YARA for files.”

YARA is the open-source standard for detecting malicious file-based content, but there has never been a course that takes a foundational approach to learning detection engineering through the lens of YARA.. until now.

I’m excited to offer an online course that will teach you how to interpret, build, and tune YARA rules to become a better detection engineer or analyst.

Introducing.

YARA for Security Analysts

YARA for Security Analysts will teach you how to write, tune, and leverage YARA rules to aid security investigations and research. This course requires no prior YARA experience and will take you from beginner rule writing through advanced techniques.

You’ll learn…

YARA Fundamentals

The anatomy of YARA rules
Rule composition and sequencing
Rule testing at the command line and with CyberChef

YARA Rule Syntax

String matching basics
Matching hexadecimal values
Complex matches with regular expressions
Controlling matches with rule conditions
Using modules to extend YARA functionality

Detection Research Methodology

The detection research process from the ground up
How to build and manage a malware corpus
Common file formats and how to approach them
Bulk rule testing against malware corpora
Detection based on exported functions and code-signing certificates

Ruleset Management

Building global vs. private rules
Tuning false positives
Resources for performance measurement and tuning

Adversary Tradecraft

Common “generic” detection ideas for hunting
Identifying malware masquerades
Finding high entropy content
Identifying the use of linked libraries
How attackers leverage stack strings
Detecting obfuscated strings

Extended Topics

Content ordering and proximity
Writing rules for features that modules don’t identify
Bulk rule creation with CyberChef and text editors
Accelerating rule writing with scripts
Using external variables

You’ll start by learning the common use cases for YARA and the basic structure of its rules. We’ll walk through several examples where I show you how to write simple rules for real malware, and you’ll get some practice interpreting and fixing pre-written rules. As we progress, you’ll work through labs where you’ll write your own rules based on malware samples that I provide. In most cases, I’ll provide a video walkthrough demonstrating how I approached writing the lab rules, but you should save those for after you’ve made your own attempt.

You’ll quickly become comfortable writing YARA rules in the scenarios where they will be most useful for you. I’ll be with you the entire way to provide feedback on your work and push you forward.

If you want to learn how to write efficient and effective YARA rules for detection, response, or threat intelligence. YARA for Security Analysts is the course you’re looking for.

YARA for Security Analysts Includes:

Over 20 hours of demonstration videos. These videos will break down the concepts and skills you need to become adept at writing YARA rules to detect diverse malware characteristics.

Hands-on labs to help you develop and test your skills. You’ll complete lab exercises by following along with class demonstrations and analyzing real malware to write your own YARA rules. I’ll be with you along the way to provide guidance and feedback on your work.

Participation in our student charitable profit-sharing program. A few times a year we designate a portion of our proceeds for charitable causes. AND students get to take part in nominating charities that are important to them to receive these donations.

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