Threat Intelligence Briefing

Threat activity has markedly decreased, showing an 88% reduction in total threats compared to the previous six-hour window. The majority of observed activity consists of SSH brute-force attempts (98%), originating primarily from Romania (21%), China (11%), and Indonesia (11%). No significant Nordic-specific activity was detected during this period. Infrastructure analysis reveals no clear preference for datacenter versus residential IPs in the observed attacks, and Tor exit node usage remains negligible. No specific ISP or hosting provider is being disproportionately targeted. Given the prevalence of SSH brute-force attempts, defenders should prioritize monitoring for unauthorized access attempts and implement multi-factor authentication where possible. Focus monitoring on networks originating from Romania and China. While not directly related to observed activity, the recent CERT-EU advisory 2025-037 concerning F5 product vulnerabilities is worth noting, given the potential for widespread impact if exploited.