- Cybercrime profits drove cybercriminals to shift techniques in 2013 away from attachments towards malicious links as anti-spam measures improved. Ransomware targeting desktop computers also increased.
- Overall malware and spam levels decreased in 2013 from 2012 levels as botnets were disrupted, though mobile malware targeting Android devices significantly increased.
- Web security threats rose in 2013 as more websites were compromised to host exploit kits and malware, with education sites most commonly hacked. Current events were increasingly used to lure users to infected websites.