Schtasks Creation Or Modification With SYSTEM Privileges
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About the rule
Rule Type
Standard
Rule Description
Detects the creation or update of a scheduled task to run with "NT AUTHORITY\\SYSTEM" privileges
Severity
Trouble
Rule Requirement
Criteria
Action1: actionname = "Process started" AND ((PROCESSNAME endswith "\schtasks.exe" AND COMMANDLINE contains " /change , /create ") AND COMMANDLINE contains "/ru " AND COMMANDLINE contains "NT AUT, SYSTEM ") AND ((PROCESSNAME notendswith "\schtasks.exe" OR (COMMANDLINE notcontains "/TN TVInstallRestore" OR COMMANDLINE notcontains "\TeamViewer_.exe")) AND (COMMANDLINE notcontains "Subscription Heartbeat" OR COMMANDLINE notcontains "\HeartbeatConfig.xml" OR COMMANDLINE notcontains "\Microsoft Shared\OFFICE") AND COMMANDLINE notcontains "/Create /F /RU System /SC WEEKLY /TN AviraSystemSpeedupVerify /TR ,:\Program Files (x86)\Avira\System Speedup\setup\avira_speedup_setup.exe,/VERIFY /VERYSILENT /NOSTART /NODOTNET /NORESTART" /RL HIGHEST") select Action1.HOSTNAME,Action1.MESSAGE,Action1.COMMANDLINE,Action1.FILE_NAME,Action1.PROCESSNAME,Action1.USERNAME,Action1.PARENTPROCESSNAME
Detection
Execution Mode
realtime
Log Sources
Windows
Author
Nasreddine Bencherchali (Nextron Systems)
