Bypass Record
Tamper-Protection Bypass × Palo Alto Networks Cortex EDR
A publicly-reported instance of Tamper-Protection Bypass bypassing Palo Alto Networks Cortex EDR, recorded with its original source. Factual record; no assessment of any specific deployment.
Mechanism
The bypass exploits a weakness in Cortex EDR's ransomware protection logic, likely by manipulating file operations or API calls to evade behavioral detection of ransomware-like activity. Specific technical details are in the linked blog.
Detection & mitigation
Monitor for unexpected termination or suspension of Cortex XDR processes (e.g., cyvera.exe, cyserver.exe) and changes to related registry keys (HKLM\SYSTEM\CurrentControlSet\Services\Cyvera). Deploy tamper protection policies and alert on any unauthorized attempts to disable or modify EDR components.
This is a record of a publicly-reported event, not an assessment of any specific organization's deployment. Detection and mitigation notes are drawn from the cited source. Where the source is silent, fields are omitted.