In this technical session, the focus is placed on the mechanisms by which real-world attackers can bypass traditional Endpoint Detection and Response (EDR) solutions undetected. The presentation explains how threat actors utilize portable scripting languages that leverage built-in system frameworks, making them universally present across devices. These scripting languages are heavily utilized by prominent ransomware operators and infostealers, achieving high success rates throughout the entire cyber kill chain. Furthermore, the architecture of standard EDRs is examined, highlighting components such as the Antimalware Scan Interface (AMSI), which serves as a specialized collector for script codes running in memory to improve security.
As attackers continue to develop evasion techniques against endpoint-centric defenses, the critical need for complementary security measures becomes apparent. A robust network security strategy is positioned as a mandatory fallback when endpoint security measures fail during an attack. Comprehensive network monitoring solutions are necessary to identify anomalous behaviors and data exfiltration attempts that might bypass static scanners or kernel-mode drivers. By continuously monitoring the network around the clock, organizations can detect stealthy threats and respond with the speed required by today’s complex cybersecurity landscape.
Takeaways
- Scripting languages are highly portable and utilize built-in system frameworks, making them accessible on virtually all devices.
- Prominent ransomware and infostealers leverage scripting languages with high success rates across the entire cyber kill chain.
- AMSI (Antimalware Scan Interface) is a Windows feature that integrates scripting applications with antivirus and EDR products.
- Standard EDR architectures rely on an agent service to process data from various collectors, such as static scanners and kernel mode drivers.
- Robust 24/7 network monitoring is critical to detect threats and exfiltration when traditional endpoint security measures fail.
