Sigma rule: Uncommon One Time Only Scheduled Task At 00:00

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-38717e09f82a, updated 2023-02-03T00:00:00.000Z.

Rule

Title
Uncommon One Time Only Scheduled Task At 00:00
Status
test
Level
high
Author
pH-T (Nextron Systems)
Date
2022-07-15
Modified
2023-02-03
File
rules/windows/process_creation/proc_creation_win_schtasks_one_time_only_midnight_task.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects scheduled task creation events that include suspicious actions, and is run once at 00:00

Log source

product
windows
category
process_creation

Detection

selection_img:
    - Image|contains: '\schtasks.exe'
    - OriginalFileName: 'schtasks.exe'
selection_cli:
    CommandLine|contains:
        - 'wscript'
        - 'vbscript'
        - 'cscript'
        - 'wmic '
        - 'wmic.exe'
        - 'regsvr32.exe'
        - 'powershell'
        - '\AppData\'
selection_time:
    CommandLine|contains|all:
        - 'once'
        - '00:00'
condition: all of selection_*

False positives (as the rule lists them)

  • Software installation

Tags

  • attack.execution
  • attack.persistence
  • attack.privilege-escalation
  • attack.t1053.005

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/windows/process_creation/proc_creation_win_schtasks_one_time_only_midnight_task.yml

Sources and licences

  • SigmaHQ

    "Uncommon One Time Only Scheduled Task At 00:00" by pH-T (Nextron Systems) (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/process_creation/proc_creation_win_schtasks_one_time_only_midnight_task.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: Uncommon One Time Only Scheduled Task At 00:00",
entity page, dataset version ref-38717e09f82a, updated 2023-02-03T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/970823b7-273b-460a-8afc-3a6811998529 (accessed 2026-11-03).
Underlying source: SigmaHQ rule 970823b7-273b-460a-8afc-3a6811998529, 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.