Possible Overwriting the File with Dev Zero or Null (via auditd)

title: Possible Overwriting the File with Dev Zero or Null (via auditd)
id: be1667f9-c78c-596d-b2ad-f681b48eb470
status: stable
description: This rule detects overwriting (effectively wiping/deleting) of a file.
references:
    - https://attack.mitre.org/techniques/T1485/
    - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1485/T1485.md
author: Huntrule Team
date: 2026-01-12
tags:
    - attack.impact
    - attack.t1485
logsource:
    product: linux
    service: auditd
detection:
    selection:
        type: 'EXECVE'
        a0|contains: 'dd'
        a1|contains:
            - 'if=/dev/null'
            - 'if=/dev/zero'
    condition: selection
falsepositives:
    - Unknown
level: low