A scheduled task was updated
editA scheduled task was updated
editIndicates the update of a scheduled task using Windows event logs. Adversaries can use these to establish persistence, by changing the configuration of a legit scheduled task. Some changes such as disabling or enabling a scheduled task are common and may may generate noise.
Rule type: eql
Rule indices:
- winlogbeat-*
- logs-system.*
Severity: low
Risk score: 21
Runs every: 5 minutes
Searches indices from: now-9m (Date Math format, see also Additional look-back time)
Maximum alerts per execution: 100
References:
Tags:
- Elastic
- Host
- Windows
- Threat Detection
- Persistence
Version: 2 (version history)
Added (Elastic Stack release): 8.5.0
Last modified (Elastic Stack release): 8.6.0
Rule authors: Elastic
Rule license: Elastic License v2
Potential false positives
editLegitimate scheduled tasks may be created during installation of new software.
Rule query
editiam where event.action == "scheduled-task-updated" and /* excluding
tasks created by the computer account */ not user.name : "*$" and
not winlog.event_data.TaskName :
("\\User_Feed_Synchronization-*", "\\OneDrive Reporting
Task-S-1-5-21*", "\\OneDrive Reporting Task-S-1-12-1-*",
"\\Hewlett-Packard\\HP Web Products Detection", "\\Hewlett-
Packard\\HPDeviceCheck")
Threat mapping
editFramework: MITRE ATT&CKTM
-
Tactic:
- Name: Persistence
- ID: TA0003
- Reference URL: https://attack.mitre.org/tactics/TA0003/
-
Technique:
- Name: Scheduled Task/Job
- ID: T1053
- Reference URL: https://attack.mitre.org/techniques/T1053/
Rule version history
edit- Version 2 (8.6.0 release)
-
-
Updated query, changed from:
iam where event.action == "scheduled-task-updated" and /* excluding tasks created by the computer account */ not user.name : "*$" and not winlog.event_data.TaskName : ("\\User_Feed_Synchronization-*", "\\OneDrive Reporting Task-S-1-5-21*", "\\Hewlett-Packard\\HP Web Products Detection", "\\Hewlett-Packard\\HPDeviceCheck")
-