Top Cyber-Threat Techniques in Q3 2023: What We’re Seeing

ReliaQuest's Q3 2023 briefing reports that spearphishing-related techniques remain the dominant attack vector (≈65% of true-positive incidents), alongside frequent user-executed malware, exploitation of public-facing applications (T1190), and fallback C2/persistence via remote management tools; the report emphasizes proactive defenses such as email gateway tuning, MFA, GPO hardening for script execution, blocking risky attachment types, asset inventory and logging, firewall/proxy restrictions, and defense-in-depth controls.