SecureBoot was disabled

Cortex XSIAM Analytics Alert Reference by Alert name

Product
Cortex XSIAM
Last date published
2026-05-18
Category
Analytics Alert Reference
Index by
Alert name

Synopsis

Activation Period

14 Days

Training Period

30 Days

Test Period

N/A (single event)

Deduplication Period

14 Days

Required Data

  • Requires:
    • XDR Agent with eXtended Threat Hunting (XTH)

Detection Modules

Detector Tags

ATT&CK Tactic

Persistence (TA0003)

ATT&CK Technique

Pre-OS Boot (T1542)

Severity

Low

Description

SecureBoot was disabled, this might be indicative of someone trying to install an alternate non-UEFI supported OS.

Attacker's Goals

Disable SecureBoot to install another OS on the machine.

Investigative actions

Check if a new operating system was installed on the same hardware.