Threat Intelligence Briefing

Global threat volume increased by 16.8% compared to the previous period, a significant deviation from the baseline primarily driven by a surge in low-reputation traffic. Nordic threat levels remained stable, with Sweden and Finland showing the highest regional activity focused on attacks and brute-force attempts. Notably, a cluster of US-based IPs from the 87.251.64.0/24 subnet emerged as the top threat actors, conducting coordinated SSH brute-force attacks. This pattern suggests a concentrated campaign rather than routine background noise. Focus defensive actions on the identified US-based subnet and known attacker IP ranges. Consider implementing temporary blocking or rate-limiting rules against these CIDR blocks to mitigate the SSH brute-force campaign. Prioritize monitoring for these specific patterns over individual IPs, as they represent a more persistent threat vector.