Sigma rule: Commands to Clear or Remove the Syslog - Builtin

Rule

Title

Commands to Clear or Remove the Syslog - Builtin

Status

test

Level

high

Author

Max Altgelt (Nextron Systems)

Date

2021-09-10

Modified

2022-11-26

File

rules/linux/builtin/lnx_clear_syslog.yml

Commit

ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects specific commands commonly used to remove or empty the syslog

Log source

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

False positives (as the rule lists them)

• Log rotation

Tags

• attack.impact
• attack.t1565.001

MITRE ATT&CK ids this rule names

• T1565.001

References

• https://www.virustotal.com/gui/file/fc614fb4bda24ae8ca2c44e812d12c0fab6dd7a097472a35dd12ded053ab8474

Read on 2026-11-03T00:58:21.399Z under licence sigma-drl-1.1@d5f4c36a from https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/linux/builtin/lnx_clear_syslog.yml