Threat Intelligence Briefing

Threat activity has decreased significantly, down 43.9% compared to the prior six-hour period. SSH brute-force attacks remain the dominant threat vector, accounting for 98% of all observed activity. Within the Nordic region, Finland and Sweden each experienced a single SSH brute-force attack. Top attacking IPs are primarily located in Russia, Romania, and the Netherlands. No significant abuse of specific hosting providers was detected, and no Tor exit node activity was observed. Given the concentrated nature of SSH brute-forcing, prioritize monitoring networks originating from Romania (RO) and Russia (RU). Analyze traffic patterns from ASNs associated with the top attacking IPs to identify potential command-and-control infrastructure. Defenders should reinforce SSH access controls, including multi-factor authentication and rate limiting. Continue to monitor for any shift in attack vectors or infrastructure usage.