Commands to Clear or Remove the Syslog - Builtin

Description

Detects specific commands commonly used to remove or empty the syslog

Query · sigma

selection:
- rm /var/log/syslog
- rm -r /var/log/syslog
- rm -f /var/log/syslog
- rm -rf /var/log/syslog
- mv /var/log/syslog
- ' >/var/log/syslog'
- ' > /var/log/syslog'
falsepositives:
- /syslog.
condition: selection and not falsepositives

Known false positives

  • Log rotation
Raw source Commands to Clear or Remove the Syslog - Builtin · Sigma
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Published by SigmaHQ/sigma ↗, licensed under Detection Rule License 1.1 ↗. Reproduced here unmodified. 
title: Commands to Clear or Remove the Syslog - Builtin
id: e09eb557-96d2-4de9-ba2d-30f712a5afd3
status: test
description: Detects specific commands commonly used to remove or empty the syslog
references:
    - https://www.virustotal.com/gui/file/fc614fb4bda24ae8ca2c44e812d12c0fab6dd7a097472a35dd12ded053ab8474
author: Max Altgelt (Nextron Systems)
date: 2021-09-10
modified: 2022-11-26
tags:
    - attack.impact
    - attack.t1565.001
logsource:
    product: linux
detection:
    selection:
        - 'rm /var/log/syslog'
        - 'rm -r /var/log/syslog'
        - 'rm -f /var/log/syslog'
        - 'rm -rf /var/log/syslog'
        - 'mv /var/log/syslog'
        - ' >/var/log/syslog'
        - ' > /var/log/syslog'
    falsepositives:
        - '/syslog.'
    condition: selection and not falsepositives
falsepositives:
    - Log rotation
level: high

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