Ransomware groups are shifting tactics in 2026, increasingly using EDR kill techniques to bypass security tools. This trend, highlighted in Halcyon’s Q2 2026 ransomware report, signals a dangerous evolution in how ransomware operators compromise organisations. While the total number of incidents is declining, the methods used are becoming more sophisticated, making detection and response more challenging for businesses of all sizes.
Ransomware Groups Target Endpoint Detection and Response (EDR) Systems
EDR kill techniques refer to methods used by attackers to disable, evade or tamper with endpoint detection and response solutions. These tools are a cornerstone of modern cybersecurity, providing real-time visibility and automated threat response. In 2026, ransomware actors increasingly focus on neutralising EDR to gain unfettered access and ensure their payloads execute without interruption.
According to the Halcyon report, Q2 2026 saw a growing prevalence of ransomware campaigns using these EDR bypass tactics. Notably, attackers are not relying on a single technique but are combining multiple approaches:
- Disabling EDR services and processes via malicious code or scripts
- Abusing legitimate system tools to tamper with EDR components
- Deploying custom drivers to unload security software
- Using advanced obfuscation to hide malicious activity from EDR analytics
These developments reflect a broader trend: ransomware groups are investing in research and development, often inspired by legitimate security research, to outmanoeuvre defenders. The report emphasises that even as attack volumes decrease, the threat to organisations remains acute due to improved evasion tactics.
Timeline and Evolution of EDR Kill Techniques in Ransomware Attacks
Ransomware operators have steadily refined their EDR kill methods throughout 2025 and into 2026. The Halcyon report documents a notable increase in these tactics during the second quarter of 2026. Attackers are leveraging both known vulnerabilities in EDR software and novel, zero-day exploits. Some campaigns employ off-the-shelf tools, while others develop bespoke binaries tailored to specific targets.
The process typically unfolds in several stages:
- Initial access is gained via phishing, compromised credentials or vulnerable internet-facing services
- Attackers conduct reconnaissance to identify the security solutions in place
- Scripts or malicious drivers are executed to disable or tamper with EDR components
- Ransomware is deployed, often with additional obfuscation to avoid detection
- Data is encrypted and exfiltrated, followed by ransom demands
This approach allows attackers to remain undetected for longer, increasing the likelihood of a successful ransom payment. Halcyon’s findings show a marked rise in the use of driver-based attacks and sophisticated obfuscation techniques, making it harder for traditional security controls to catch malicious activity in real time.
Who Is Affected and What Products Are Targeted?
The current wave of ransomware attacks using EDR kill techniques affects organisations across sectors, but UK small and medium-sized businesses (SMBs) are highlighted as particularly vulnerable. Attackers often target widely used EDR products, including those from leading security vendors. No single vendor or version is immune, as threat actors adapt their methods to the specific environment they encounter.
Commonly targeted platforms include:
- Windows endpoints and servers running commercial EDR solutions
- Managed detection and response platforms deployed in hybrid environments
- Unpatched or misconfigured EDR deployments lacking tamper protection
The report notes that organisations with poor patch management or insufficient service monitoring are disproportionately affected. Attackers also leverage weaknesses in driver management, exploiting legitimate drivers that can be abused to unload security software.
Current Exploitation Status and Defensive Measures
As of July 2026, exploitation of EDR kill techniques in ransomware campaigns is ongoing and widespread. Halcyon warns that while the total number of ransomware cases has slightly decreased, the proportion involving EDR tampering is rising. Attackers are also innovating with heavier obfuscation, making malicious activity less visible to automated defences and threat intelligence feeds.
To mitigate these risks, Halcyon recommends that UK SMBs and other organisations should:
- Validate EDR tamper protection is enabled and tested across all endpoints
- Implement and maintain up-to-date driver block lists to prevent abuse of vulnerable drivers
- Continuously monitor security services for unexpected changes or stoppages
- Ensure backups are resilient, regularly tested, and isolated from production systems
These measures are essential to limit the impact of ransomware campaigns that leverage EDR kill techniques. However, the evolving nature of these attacks means ongoing vigilance and rapid response capabilities are critical for all organisations.
Why This Matters for UK SMBs
The increasing use of EDR kill techniques by ransomware groups raises the stakes for UK SMBs, who may lack the resources to quickly detect and contain advanced threats. As attackers focus on bypassing core security controls, businesses must ensure their defences are not only in place but also resilient against tampering and evasion. Staying alert to these trends and implementing targeted defensive measures can greatly reduce the risk of a damaging ransomware incident.
Originally reported by infosecurity-magazine.com.
