Absolutely no day malware, also called zero hour malware or no day attacks, is a type of malware that makes the most of a previously unknown software vulnerability. look at here Attackers who have the ability to exploit these vulnerabilities can access to a system or network with no detection. This makes absolutely no day malware a serious danger to organizations and people alike.
Standard malware, on the other hand, is malware that is popular and has actually been around for some time. Although conventional malware can still threaten, it is not as difficult or stealthy to spot as no day malware. https://bikramyogauk.net/?p=401