It’s a simple matter of facts. Zero-day malware has proven to bypass even the most advanced detection mechanisms on the market. That alone should illustrate how defenseless organizations are when trying to protect themselves against one of the most sophisticated threats by using irrelevant tools. Perhaps this mindset is what helped lead us to the point where there were 1,579 publicly disclosed data breaches in 2017 – a 44% increase from 2016.

https://www.votiro.com/detection-or-prevention-stopping-zero-day-malware/