Threat Intelligence Briefing

Global threat volume changed by several orders of magnitude (2,248 → 15,391 events), representing a severe deviation from the previous 6-hour baseline. This surge is attributed to a sharp increase in spam and SSH brute force attacks, predominantly sourced from US and Dutch ASNs. Nordic traffic remains stable and consistent with its typical low-volume baseline, with Sweden and Finland showing routine scanning and brute force activity from known anonymizer and C2 infrastructure. No new campaigns emerged; this is a significant amplification of existing threat vectors. Consider implementing temporary rate-limiting on SSH services and scrutinize traffic from the top contributing ASNs in the US (e.g., ASNs for major cloud providers) and Netherlands. The ephemeral nature of the attacking IPs means blocking individual addresses is ineffective; focus on behavioral patterns and geographic/ASN clusters instead. Deprioritize individual IPs from the top list, as they are part of a larger, shifting botnet.