Phishing Attacks with Null Subject Lines Target High-Profile Users via QR Codes and RMM Tools (infosecurity-magazine.com)

• Null subject lines are used to bypass email security filters.
• QR codes in emails lead to credential harvesting pages.
• RMM software abuse enables persistent remote access.

"A surge in sophisticated phishing campaigns specifically targeting VIP users has been observed. Attackers use emails with empty subject lines to evade spam filters, embedding QR codes that lead to credential harvesting pages or abusing Remote Monitoring and Management (RMM) software to gain persistent access."