blue-team-tools/rules/linux/builtin/lnx_clear_syslog.yml

title: Commands to Clear or Remove the Syslog
id: e09eb557-96d2-4de9-ba2d-30f712a5afd3
status: experimental
description: Detects specific commands commonly used to remove or empty the syslog
author: Max Altgelt
date: 2021/09/10
references:
    - https://www.virustotal.com/gui/file/fc614fb4bda24ae8ca2c44e812d12c0fab6dd7a097472a35dd12ded053ab8474
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