Malware researcher reverse engineered a threat that went undetected for at least 2 years August 20, 2018 https://securityaffairs.co/wordpress/75478/malware/malware-reverse-engineering.html
I hope the malware heads finally clear out the closets of all of the old, from Windows 98 thru XP outdated/forgotten threats, so these new researchers can finally drudge them out, tag them, and put those bugs to rest for good. Would imagine there's plenty more java-evals-javascript relics still laying around dormant in the cobwebs ready to be discovered again. Hard to blame AV's for not cataloging junk left about in those rusting old early versions but can still be used to slip thru the cracks by bored out of their head malware nuts
Some notable ones still are not detecting it on VT; McAfee, Symantec, Windows Defender, Panda, and Sophos.