Sigma rule: Locked Workstation

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-e57767ccc6e0, updated 2023-12-11T00:00:00.000Z.

Rule

Title
Locked Workstation
Status
stable
Level
informational
Author
Alexandr Yampolskyi, SOC Prime
Date
2019-03-26
Modified
2023-12-11
File
rules/windows/builtin/security/win_security_workstation_was_locked.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects locked workstation session events that occur automatically after a standard period of inactivity.

Log source

product
windows
service
security

Detection

selection:
    EventID: 4800
condition: selection

False positives (as the rule lists them)

  • Likely

Tags

  • attack.impact

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/builtin/security/win_security_workstation_was_locked.yml

Sources and licences

  • SigmaHQ

    "Locked Workstation" by Alexandr Yampolskyi, SOC Prime (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/builtin/security/win_security_workstation_was_locked.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: Locked Workstation",
entity page, dataset version ref-e57767ccc6e0, updated 2023-12-11T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/411742ad-89b0-49cb-a7b0-3971b5c1e0a4 (accessed 2026-11-03).
Underlying source: SigmaHQ rule 411742ad-89b0-49cb-a7b0-3971b5c1e0a4, 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.