Modifying Crontab

Detects suspicious modification of crontab file.

Sigma rule (View on GitHub)

 1title: Modifying Crontab
 2id: af202fd3-7bff-4212-a25a-fb34606cfcbe
 3status: test
 4description: Detects suspicious modification of crontab file.
 5references:
 6    - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1053.003/T1053.003.md
 7author: Pawel Mazur
 8date: 2022/04/16
 9tags:
10    - attack.persistence
11    - attack.t1053.003
12logsource:
13    product: linux
14    service: cron
15detection:
16    keywords:
17        - 'REPLACE'
18    condition: keywords
19falsepositives:
20    - Legitimate modification of crontab
21level: medium

References

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