Introducing Nimfilt: A reverse-engineering tool for Nim-compiled binaries

ESET presents Nimfilt, a Python/IDA plugin that accelerates reverse engineering of Nim-compiled binaries by detecting Nim-specific artifacts, demangling function and package names (often revealing developer paths), organizing functions by package/path, and applying C-style structs to Nim strings; it includes heuristics and YARA rules to identify Nim-built PE/ELF files and is available on ESET’s GitHub, with context noting increased Nim adoption by threat actors such as Sednit and Mustang Panda.