Attackers are always looking for new tricks to distribute malware without them being detected by antivirus scanners and secure email gateways. This was illustrated in a new phishing campaign that utilized a specially crafted ZIP file that was designed to bypass secure email gateways to distribute the NanoCore RAT. […]

from https://www.bleepingcomputer.com/news/security/specially-crafted-zip-files-used-to-bypass-secure-email-gateways/