This article contains a list of every respectable Windows anti-malware vendor, with a signature based product, that I am aware of. Thus this list, in addition to showing you how to easily submit malware or false positives to all of them, also serves as a reference for anti-malware products which are confirmed to be legitimate.
- https://www.techsupportalert.com/content/how-report-malware-or-false-positives-multiple-antivirus-vendors.htm
Yandex ~ https://yandex.com/support/webmaster/security/send-yandex.html
thx