https://tech.newstatesman.com/whitepapers/an-introduction-to-advanced-malware-and-how-it-avoids-detection

Despite millions being spent on security products, organizations are still suffering from advanced malware attacks and data breaches. Attacks continue to succeed because the malware has been engineered to detect and evade “advanced” or “next-generation” tools like firewalls, sandboxes, and IPS.

Organizations interested in safeguarding their data need to understand how evasive malware behaves and how it has been engineered to evade many of the most popular malware detection tools in the industry.