Removal Of Index Value to Hide Schedule Task - Registry
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About the rule
Rule Type
Standard
Rule Description
Detects when the "index" value of a scheduled task is removed or deleted from the registry. Which effectively hides it from any tooling such as "schtasks /query"
Severity
Trouble
Rule Requirement
Criteria
Action1: actionname = "Registry entry deleted" AND ACCESSES = "DeleteKey" AND ((OBJECTNAME contains "\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Schedule\TaskCache\Tree" AND OBJECTNAME contains "Index") OR (OBJECTNAME endswith "\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Schedule\TaskCache\Tree" AND isExist(OBJECTVALUENAME))) select Action1.HOSTNAME,Action1.MESSAGE,Action1.PROCESSNAME,Action1.OBJECTNAME
Detection
Execution Mode
realtime
Log Sources
Windows
Author
Nasreddine Bencherchali (Nextron Systems)
