In the past year hackers have been launching cyber Attacks against SMB ports and IoT devices at record pace, more than tripling in the past year.
TCP ports primarily used on IoT devices were highly targeted. Exploits like Eternal Blue which targets a flaw in SMB protocol through port 445, has been widley used for Attacks on healthcare organizations. Microsoft has long ago released a patch for the vulnerability, but many devices remain vulnerable.
The prevalence of attacks is most likely due to the continuing increase of IoT devices. The majority of these attacks were automated traffic from bots, malware, and other tools.