How to Create F.L.I.R.T Signature Using Yara Rules for Static Analysis of ELF Malware

This article explains a technique for improving static analysis of stripped ELF malware by generating YARA rules from a target sample, using VirusTotal Retrohunt to find symbol-rich binaries, and creating matching FLIRT signatures, aided by the AutoYara4FLIRT IDA plugin and CLI. It provides a YARA condition for detecting binaries with .symtab/.strtab, discusses workflow and automation, and reports evaluation results (roughly 60% function match on x86 and ~30% on ARM, with some x86 samples >90%), noting VT Retrohunt requirements and broader applicability across architectures.