Just released FOSS from the NSA designed as tool to reverse engineer malware it is very complete and is gaining favourable reviews from security researchers.
https://ghidra-sre.org/InstallationGuide.html install guide Java
https://www.zdnet.com/article/nsa-release-ghidra-a-free-software-reverse-engineering-toolkit/?ftag=TRE-03-10aaa6b&bhid=23315502947047228201584884783924
Source Code will be on Git