60% of QR code emails are spam according findings from Cisco Talos, who also identified attackers using QR code art to bypass security filters
60% of QR code emails are spam according findings from Cisco Talos, who also identified attackers using QR code art to bypass security filters
I wonder how much extra compute it would take to run images through a QR code reader as part of filtering. Resolve the destination.
But then that would confirm that they hit a valid email if they track the image being loaded from their server/cdn.