Sigma rule: Defrag Deactivation

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-39c8369ea150, updated 2022-10-09T00:00:00.000Z.

Rule

Title
Defrag Deactivation
Status
test
Level
medium
Author
Florian Roth (Nextron Systems), Bartlomiej Czyz (@bczyz1)
Date
2019-03-04
Modified
2022-10-09
File
rules-emerging-threats/2018/TA/Slingshot/proc_creation_win_apt_slingshot.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects the deactivation and disabling of the Scheduled defragmentation task as seen by Slingshot APT group

Log source

product
windows
category
process_creation

Detection

selection:
    Image|endswith: '\schtasks.exe'
    CommandLine|contains:
        - '/delete'
        - '/change'
    CommandLine|contains|all:
        - '/TN'
        - '\Microsoft\Windows\Defrag\ScheduledDefrag'
condition: selection

False positives (as the rule lists them)

  • Unknown

Tags

  • attack.privilege-escalation
  • attack.execution
  • attack.persistence
  • attack.t1053.005
  • attack.s0111
  • detection.emerging-threats

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-emerging-threats/2018/TA/Slingshot/proc_creation_win_apt_slingshot.yml

Sources and licences

  • SigmaHQ

    "Defrag Deactivation" by Florian Roth (Nextron Systems), Bartlomiej Czyz (@bczyz1) (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules-emerging-threats/2018/TA/Slingshot/proc_creation_win_apt_slingshot.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: Defrag Deactivation",
entity page, dataset version ref-39c8369ea150, updated 2022-10-09T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/958d81aa-8566-4cea-a565-59ccd4df27b0 (accessed 2026-11-03).
Underlying source: SigmaHQ rule 958d81aa-8566-4cea-a565-59ccd4df27b0, 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.