Threat Intelligence Briefing

Observed threat activity spiked significantly, increasing 130.8% compared to the previous 6-hour period, driven primarily by malware and SSH brute-force attacks. The majority of threats originated from datacenters, with limited activity from residential IPs. Within the Nordic region, Sweden saw 4 attacks and Finland 1, all categorized as SSH brute-forcing. No specific ISPs or hosting providers were disproportionately targeted. No Tor exit node abuse detected. Given the surge in brute-force activity originating from Russian networks (ASNs to be investigated), defenders should prioritize monitoring for lateral movement following successful breaches. Specifically, monitor the 45.135.232.0/24 subnet. Consider implementing rate limiting and multi-factor authentication to mitigate SSH brute-force attempts. Continue tracking malware C2 infrastructure, as this represents the most prevalent threat category.