Olesia Klevchuk is Principal Product Marketing Manager for email security at Barracuda Networks. In her role, she focuses on defining how organizations can protect themselves against advanced email threats, spear phishing and account takeover. Prior to Barracuda, Olesia worked in email security, brand protection, and IT research.
Barracuda Networks found that HTML attachments were malicious more than double than the next leading type of file.
These attacks are difficult to detect because HTML attachments themselves are not malicious. Attackers do not include malware in the attachment itself but instead use multiple redirects with Java script libraries hosted elsewhere.