Arya: The New Tailor-Made EICAR Using Yara

This report presents Arya, a tool that parses YARA rules (via yaramod) and synthesizes pseudo‑malicious files containing strings, byte sequences, PE headers, and x86 code to deliberately trigger YARA, antivirus, and EDR detections for research, rule QA, and purple‑teaming. It describes Arya's architecture (AST traversal, mapping and placer components), supported features, limitations, and intended use for testing detection pipelines rather than describing an active cyber incident.