“Mirai-like” describes automated bot activity that behaves like the Mirai malware family: large-scale, fast, noisy scanning across the internet to find exposed devices and services. The pattern is usually simple and highly repetitive, with bots probing many IPs and ports in parallel, often targeting legacy services such as Telnet, SSH, or weakly protected admin interfaces.
This matters because Mirai-style scanning turns a new weakness into a broad exposure problem within minutes or hours. Defenders may see bursts of connection attempts, login probes, and payload delivery from many rotating addresses rather than a single attacker. In practice, the label helps analysts distinguish opportunistic bot traffic from targeted intrusion. Good defenses include closing unused ports, restricting management access, patching quickly, rate limiting, blocking known bad ranges, and monitoring for unusual scan volume or authentication failures. “Mirai-like” does not prove a specific botnet, but it is a strong indicator of automated exploitation pressure.