The ever-evolving malware shows off new tactics that use email thread hijacking and other obfuscation techniques to provide advanced evasion techniques.
https://threatpost.com/exchange-servers-speared-in-icedid-phishing-campaign/179137/
The ever-shifting, ever-more-powerful malware is now hijacking email threads to download malicious DLLs that inject password-stealing code into webpages, among other foul things.
https://threatpost.com/qakbot-botnet-sprouts-fangs-injects-malware-into-email-threads/178845/