SAN DIEGO, April 30, 2025 (GLOBE NEWSWIRE) -- ESET, a global leader in cybersecurity, is warning organizations to stay alert as “EDR killers” - tools designed to disable Endpoint Detection and Response (EDR) solutions- grow more accessible and more widely used by ransomware affiliates. While not a new threat, these tools are becoming easier to deploy, making them relevant for enterprises and mid-sized organizations alike.

An EDR killer works by disabling or impairing EDR agents on compromised machines, blinding defenders and paving the way for attackers to move stealthily and deliver malicious payloads. These tools are typically deployed after initial access has already been achieved, a process that itself should set off multiple alarms in a well-defended environment.

Once used only by highly skilled threat actors, EDR killers are now distributed by ransomware-as-a-service (RaaS) operators like RansomHub, lowering the technical bar for attackers. Variants range from basic script-based tools to more advanced versions that exploit vulnerable drivers or repurpose legitimate software, like rootkit removal tools, to disable security systems.

Despite these developments, ESET stresses that EDR killers aren’t cause for panic, but they are a reminder of the importance of strong, layered security. Organizations with solid defences, good detection practices, and well-trained staff remain in a strong position to detect and disrupt these tools before they cause severe damage.

ESET recommends the following best practices to reduce exposure:

• Use a hardened, updated EDR solution: Leading tools already detect many known EDR killer behaviours.
• Restrict user permissions: Prevent users without admin rights from modifying or disabling security controls.
• Monitor for suspicious downloads and file transfers: Watch for scripts, drivers, or tools commonly used in these attacks.
• Block Potentially Unsafe Applications (PUSA): Review app control policies to minimize exposure to misused software.
• Invest in staff training: Phishing awareness and safe file handling are still your first line of defence.
  

The rise of EDR killers reflects an evolving cybercrime landscape, where increasingly advanced tools are being commercialized and shared. As attackers adapt their tactics, defenders must do the same. A resilient, multi-layered approach, backed by regular reviews and user education, remains the best strategy for staying ahead.

ESET continues to track the development of EDR killer tools and their use in real-world attacks. For further insights and technical analysis, visit ESET’s threat research blog, WeLiveSecurity.

About ESET
ESET provides cutting-edge digital security to prevent attacks before they happen. By combining the power of AI and human expertise, ESET stays ahead of known and emerging cyber threats — securing businesses, critical infrastructure, and individuals. Whether it’s endpoint, cloud or mobile protection, its AI-native, cloud-first solutions and services remain highly effective and easy to use. ESET technology includes robust detection and response, ultra-secure encryption, and multi-factor authentication. With 24/7 real-time defence and strong local support, we keep users safe and businesses running without interruption. An ever-evolving digital landscape demands a progressive approach to security: ESET is committed to world-class research and powerful threat intelligence, backed by R&D centers and a strong global partner network. For more information, visit www.eset.com or follow us on LinkedIn, Facebook, and Twitter.

Media contact:
Jessica Beffa
jessica.beffa@eset.com
720-413-4938