https://github.com/pyperanger/gorootcheck
A rootkit-checking tool, written in Go. It does a few things. two of which include using OSSSEC rootkit lists as input to search for the rootkits listed in these files. (AFAICT, the OSSEC rootkit files don’t have any firmware bootkit entries.)
https://www.ossec.net/docs/manual/rootcheck/manual-rootcheck.html
https://github.com/ossec/ossec-hids/commits/master/src/rootcheck/db/rootkit_files.txt
https://github.com/ossec/ossec-hids/commits/master/src/rootcheck/db/rootkit_trojans.txt