UAC Bypass Abusing Winsat Path Parsing - Registry
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About the rule
Rule Type
Standard
Rule Description
Detects the pattern of UAC Bypass using a path parsing issue in winsat.exe (UACMe 52)
Severity
Trouble
Rule Requirement
Criteria
Action1:
actionname = "Registry value modified" AND (OBJECTNAME contains "\Root\InventoryApplicationFile\winsat.exe|" OR (OBJECTNAME endswith "\Root\InventoryApplicationFile" AND OBJECTVALUENAME startswith "winsat.exe|")) AND OBJECTNAME endswith "\LowerCaseLongPath" AND INFORMATION startswith "c:\users" AND INFORMATION endswith "\appdata\local\temp\system32\winsat.exe"
select Action1.HOSTNAME,Action1.MESSAGE,Action1.OBJECTNAME,Action1.PROCESSNAME,Action1.PREVVAL,Action1.CHANGES,Action1.USERNAME,Action1.DOMAIN,Action1.NEWTYPE,Action1.OBJECTVALUENAME,Action1.OLDTYPE
Detection
Execution Mode
realtime
Log Sources
Windows
Author
Christian Burkard (Nextron Systems)
