Ransomware is one of the malware types that makes traditional antivirus protection programs ineffective. A simulated threat exercise in March of this year found that only 52 percent of potential threats were thwarted by a traditional (signature-based) antivirus product approach. IBM study found that nearly half of businesspeople reported being hit by ransomware last year, with 70 percent of those organizations ponying up the ransom. New developments are in progress that will strengthen antivirus capabilities, including behavior analytics, sandboxing and machine learning.”]
Source: https://securityintelligence.com/news/is-antivirus-protection-still-relevant/