Security News > 2021 > June > Zero day malware reached an all-time high of 74% in Q1 2021

74% of threats detected in Q1 2021 were zero day malware - or those for which a signature-based antivirus solution did not detect at the time of the malware release - capable of circumventing conventional antivirus solutions, according to WatchGuard.

The report also covers new threat intelligence on rising network attack rates, how attackers are trying to disguise and repurpose old exploits, the quarter's top malware attacks, and more.

"Q1 2021 saw the highest level of zero day malware detections we've ever recorded. Evasive malware rates have actually eclipsed those of traditional threats, which is yet another sign that organizations need to evolve their defenses to stay ahead of increasingly sophisticated threat actors," said Corey Nachreiner, CSO at WatchGuard.

XML.JSLoader is a malicious payload that appeared for the first time in both top malware by volume and most widespread malware detections lists.

A new threat signature was detected in Q1 that involves a directory traversal attack via cabinet files, a Microsoft-designed archival format intended for lossless data compression and embedded digital certificates.

Cryptominer malware has become increasingly popular due to recent price spikes in the cryptocurrency market and the ease with which threat actors can siphon resources from unsuspecting victims.

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