Mirai Botnet is a malware family tracked across 1 threat cluster and 1 intelligence report mention on ThreatCluster. First observed December 9, 2025; most recent activity December 9, 2025.
Mirai Botnet is an IoT-focused malware family that historically propagates by exploiting default credentials and weak services (notably Telnet) to recruit compromised devices into a botnet for large-scale distributed denial-of-service (DDoS) attacks. It spawned numerous variants, highlighting the persistent risk from insecure IoT ecosystems and driving ongoing emphasis on device security, credential hardening, and patch management in cybersecurity.
On December 9, 2025, Microsoft 365 services faced disruptions in the UK, affecting users' access to Microsoft Copilot and key features. The issue, identified as “CP1193544,” has led to reports of complete…