Many yet undetectable by Norton malware samples of my collection having this status. They are 100% viruses: they spread across LAN by copying itself from infected machines and the same same, sometimes different icons, always no comments, named like the name of folder then it is (or parts of other directories and files in its folder), detected by more than 50% products on virus total.
for 20-25 days ago appeared the bunch of .exe (or .pif or .bat) with .rar files with the same name in 2-files bunch. same content of different named files. Many indications what it is a viruses. Not only that files have been "Exonerated", other malware too.
All malware samples (about 40-50) exept the 2-files bunch was submitted to Symantec via web page for 3-4 times during the last 4 months. Response is low: only some files now is blacklisted. Get tired with submitting files while response is so. Kaspersky and Avira was greatly more responsible for that: files was blacklisted from 4-5 hours to 2-3 days after I send it to them.