Arya is a unique tool that produces pseudo-malicious files meant to trigger YARA rules. You can think of it like a reverse YARA

YARA rules are an essential tool for security researchers that help them identify and classify malware samples. They do so by describing patterns and strings within malware code that can help an analyst identify known or new threats. YARA rules are also often integrated within commercial detection tools, or used internally to detect misbehaving binaries on the enterprise network

Today’s release of Arya gives security researchers, network analysts, and incident response teams an effective tool to test YARA rules, their software and themselves. YARA rules are an essential means of classifying and identifying malware samples. And Arya is a means by which organizations can test the security of their networks, train their IR teams and also improve their defense tools and software

https://claroty.com/2022/03/16/blog-research-arya-the-new-tailor-made-eicar-using-yara/ 

Github : https://github.com/claroty/arya 

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