KnowBe4 - Scam Of The Week: World's Largest Phishing Botnet Grows Evasive

The notorious Necurs botnet is one of the oldest and largest spam and phishing delivery systems in existence. It controls millions of machines that the criminal botmasters use to send malicious payloads. Necurs has now adopted a retro trick to make itself more evasive and less likely to have its phishing intercepted by your filters.

from KnowBe4 Security Awareness Training Blog https://blog.knowbe4.com/scam-of-the-week-worlds-largest-phishing-botnet-grows-evasive