Suspicious Udev driver rule execution manipulation

Cortex XDR Analytics Alert Reference by Alert name

Product
Cortex XDR
Last date published
2024-06-04
Category
Analytics Alert Reference
Order
Alert name

Synopsis

Activation Period

14 Days

Training Period

30 Days

Test Period

N/A (single event)

Deduplication Period

1 Day

Required Data

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

Detection Modules

ATT&CK Tactic

ATT&CK Technique

Boot or Logon Autostart Execution: Kernel Modules and Extensions (T1547.006)

Severity

Low

Description

Udev driver rule was modified with unusual pattern, might be used by adversaries to backdoor existing drivers.

Attacker's Goals

Adversaries can use this technique to execute arbitrary commands once the machine boots.

Investigative actions

  • Check if the action was done using an automation service.
  • Check the rule modification content and look for any suspicious payloads.
  • Check if there are any other suspicious activities originated from the same machine/executing user.

Variations

Unusual Udev driver rule execution manipulation

Synopsis

ATT&CK Tactic

ATT&CK Technique

Boot or Logon Autostart Execution: Kernel Modules and Extensions (T1547.006)

Severity

Low

Description

Udev driver rule was modified with unusual pattern, might be used by adversaries to backdoor existing drivers.

Attacker's Goals

Adversaries can use this technique to execute arbitrary commands once the machine boots.

Investigative actions

  • Check if the action was done using an automation service.
  • Check the rule modification content and look for any suspicious payloads.
  • Check if there are any other suspicious activities originated from the same machine/executing user.