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'This query detects attempts by malware to hide the scheduled task by deleting the SD (Security Descriptor) value. Removal of SD value results in the scheduled task disappearing from schtasks /query and Task Scheduler. The query requires auditing to be turned on for HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Schedule\TaskCache\Tree registry hive as well as audit policy for registry auditing to be turned on. Reference: https://www.microsoft.com/security/blog/2022/04/12/tarr
| Attribute | Value |
|---|---|
| Type | Analytic Rule |
| Solution | Windows Security Events |
| ID | 6dd2629c-534b-4275-8201-d7968b4fa77e |
| Severity | High |
| Status | Available |
| Kind | Scheduled |
| Tactics | DefenseEvasion |
| Techniques | T1562 |
| Required Connectors | SecurityEvents, WindowsSecurityEvents |
| Source | View on GitHub |
This content item queries data from the following tables:
| Table | Selection Criteria | Transformations | Ingestion API | Lake-Only |
|---|---|---|---|---|
SecurityEvent |
EventID == "4657" |
✓ | ✓ | ? |
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