Presidents’ Day malvertising blitz
Cybersecurity researchers observed a swell of malicious ads flooding the internet over Presidents’ Day weekend, striking at a time when ad network employees were enjoying the three days off. With tech support slower to respond, cybercriminals took the opportunity to inject bad ads into regular ad rotation. Researchers tracked as many as 800 million ads over the three-day weekend. Instead of infecting the user’s system with malware, the ads led to phishing screens that tried to coax login credentials from the users.