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HighMicrosoft Sentinel analytics

Scheduled Task Hide

Identifies malware hiding scheduled tasks by deleting the SD (Security Descriptor) value, making tasks disappear from schtasks /query and Task Scheduler. Enable registry auditing policy and auditing on…

Description

Identifies malware hiding scheduled tasks by deleting the SD (Security Descriptor) value, making tasks disappear from schtasks /query and Task Scheduler. Enable registry auditing policy and auditing on HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Schedule\TaskCache\Tree. Reference: https://www.microsoft.com/en-us/security/blog/2022/04/12/tarrask-malware-uses-scheduled-tasks-for-defense-evasion/ Reference: https://learn.microsoft.com/en-us/previous-versions/windows/it-pro/windows-10/security/threat-protection/auditing/audit-registry

Detection logic

Detection requirements

Platform
ContainersESXiIaaSIdentity ProviderLinuxmacOSNetwork DevicesOffice SuiteWindows

The rule states no platform. This is derived from the ATT&CK technique it maps to.

Log source product
securityeventswindowssecurityevents
Log source service
securityevent

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