Sigma rule: Crontab Enumeration

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-ed9cd76f2179, updated 2023-06-02T00:00:00.000Z.

Rule

Title
Crontab Enumeration
Status
test
Level
low
Author
Joseliyo Sanchez, @Joseliyo_Jstnk
Date
2023-06-02
File
rules/linux/process_creation/proc_creation_lnx_crontab_enumeration.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects usage of crontab to list the tasks of the user

Log source

product
linux
category
process_creation

Detection

selection:
    Image|endswith: '/crontab'
    CommandLine|contains: ' -l'
condition: selection

False positives (as the rule lists them)

  • Legitimate use of crontab

Tags

  • attack.discovery
  • attack.t1007

MITRE ATT&CK ids this rule names

References

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/process_creation/proc_creation_lnx_crontab_enumeration.yml

Sources and licences

  • SigmaHQ

    "Crontab Enumeration" by Joseliyo Sanchez, @Joseliyo_Jstnk (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/linux/process_creation/proc_creation_lnx_crontab_enumeration.yml.
    Licensed under the Detection Rule License (DRL) 1.1: https://github.com/SigmaHQ/Detection-Rule-License

    Detection Rule License (DRL) 1.1

Cite this page

Dragons Eye Ransomware Tracker, "Sigma rule: Crontab Enumeration",
entity page, dataset version ref-ed9cd76f2179, updated 2023-06-02T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/403ed92c-b7ec-4edd-9947-5b535ee12d46 (accessed 2026-11-03).
Underlying source: SigmaHQ rule 403ed92c-b7ec-4edd-9947-5b535ee12d46, commit ccbb0369507f796db0b0ae6854c8a2be471b9d84.

Pages change. The dataset version identifies the data, but no archive of old versions is kept, so this citation cannot be replayed later.