Windows Installer AlwaysInstallElevated Registry Modification
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About the rule
Rule Type
Standard
Rule Description
Detects modification of the Windows Installer policy registry key AlwaysInstallElevated to enable elevated MSI installations, which can allow privilege escalation by executing MSI packages with SYSTEM privileges.
Severity
Trouble
Rule Requirement
Criteria
Action1:
actionname = "Registry Event" AND ( OBJECTNAME contains "Software\Policies\Microsoft\Windows\Installer" ) AND ( OBJECTNAME contains "AlwaysInstallElevated" OR OBJECTVALUENAME = "AlwaysInstallElevated" ) AND ( INFORMATION contains "0x00000001" OR CHANGES = "1" )
select Action1.HOSTNAME,Action1.MESSAGE,Action1.PROCESSNAME,Action1.OBJECTNAME,Action1.OBJECTVALUENAME,Action1.ACCESSES,Action1.USERNAME,Action1.DOMAIN,Action1.PREVVAL,Action1.CHANGES,Action1.INFORMATION
Detection
Execution Mode
realtime
Log Sources
Windows
