What is the most common type of absolutely no day malware?

No day malware is a type of malware that is not yet understood to the anti-virus software. The most common type of absolutely no day malware is a trojan horse. A trojan horse is a type of malware that disguises itself as a safe program in order to gain access to a system. https://romanquarterconsultation.co.uk/?p=1284https://cleardex.io/?p=661