Yara rules classify and identify malware samples by creating descriptions of malware families (it is a tool used to identify files, based on textual or binary pattern). YARA rules are like a piece of programming language, they work by defining a number of variables that contain patterns found in a sample of malware. If some or all of the conditions are met, depending on the rule, then it can be used to successfully identify a piece of malware.
![](https://i0.wp.com/original-network.com/wp-content/uploads/2022/11/Ban_Original_Network_Detection_Response.png?w=750&ssl=1)
A rule consists of a set of strings and conditions that determine its logic. Rules can be compiled with “yarac” to increase the speed of multiple Yara scans.
![](https://i0.wp.com/original-network.com/wp-content/uploads/2022/11/YARA_Rule.webp?w=750&ssl=1)
Creating Yara rules to search for artifacts, using the Mandiant IOC collector to save different IOCs with AND/OR conditions, and using Redline to search for the IOCs collected by the Mandiant IOC collector within a disk/memory.
Steps order:
1) Import Module – Yara modules allow you to extend its functionality. The PE module can be used to match specific data from a PE.
2) Rule Name – The rule name identifies your Yara rule. It’s recommended to add a meaningful name.
3) Metadata – Rules can also have a metadata section where you can put additional information about your rule.
4) Strings – The field strings is used to define the strings that should match your rule. It exists 3 type of strings: Text strings, Hexadecimal strings and Regex.
5) Condition – Conditions are Boolean expressions used to match the defined pattern.
Here’s an anatomy of a Yara rule (thanks to @Fr0gger_ for the diagram):
![](https://i0.wp.com/original-network.com/wp-content/uploads/2022/11/1668421912654.jpg?w=750&ssl=1)
Use Cases:
YARA has proven to be extremely popular within the infosec community, the reason being is there are a number of use cases for implementing YARA:
- Identify and classify malware,
- Find new samples based on family-specific patterns,
- Incident Responders can deploy YARA rules to identify samples and compromised devices,
- Proactive deployment of custom YARA rules can increase an organization’s defenses.
Building a SOC: Blog Post
List of vendors and software affected by the OpenSSL vulnerability: Blog Post
Critical OpenSSL Vulnerability version 3.0: Blog Post
Veeam v12 Linux Without SSH And SUDO: Blog PostHardened Repository in Veeam v12: Blog Post
Wasabi Object Storage Usage with Veeam B&R v12: Blog Post
VeeaMover in v12: Blog Post
Ransomware & Cybersecurity with Veeam v12: Blog Post
Why backup directly to Object Storage? Blog Post
Veeam B&R v12 New Features Overview: Blog Post
[REPLAY] Webinar Veeam v12 and Wasabi: Replay
Protect your data with Veeam and Wasabi: Blog post
Wasabi – Object Lock feature spotlight: Blog post
Veeam and the S3-compatible object storage solutions: Blog Post
[PODCAST] VeeamUser Group France #1: Record
Conti initiates their attacks on Backup: Blog Post
Backup with Trusted Repository Storage: Blog Post.
Protect your Backup against Ransomware: Blog Post.