Version 4.2.2 is available upstream. Please consider updating!
It seems that version 4.2.2 is available upstream, while the latest version in the Gentoo tree is 4.2.1. You think this warning is false? Read more about it here.
YARA is a tool aimed at (but not limited to) helping malware
researchers to identify and classify malware samples. With YARA you can
create descriptions of malware families (or whatever you want to
describe) based on textual or binary patterns.