Many organizations rely exclusively on Endpoint Detection and Response (EDR) or Antivirus (AV) for security telemetry, creating a single point of failure. This article highlights the danger of this approach, illustrating how attackers can disable or tamper with security agents to hide their activity. By establishing a vendor-independent logging foundation, security teams can maintain visibility even when primary tools are compromised.
Using the CACTUS ransomware incident as a case study, the author demonstrates how native Windows Security events, specifically Event ID 5140, allowed investigators to reconstruct an attack after EDR was blinded. The post also analyzes MITRE ATT&CK data, emphasizing that process creation and logon session tracking are critical for comprehensive detection, narrative stitching, and forensic correlation.
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