Elastic Defend high stable eql

UAC Bypass via WSReset Execution Hijack

Identifies attempts to bypass User Account Control (UAC) via WSReset execution hijack. Attackers bypass UAC to stealthily execute code with elevated permissions.

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Detection Logic

sequence with maxspan=60s
 [registry where
  registry.path :
      ("HKEY_USERS\\S-1-5-21-*Classes\\*\\Shell\\open\\command\\DelegateExecute",
       "HKEY_USERS\\S-1-12-1-*Classes\\*\\Shell\\open\\command\\DelegateExecute",
       "*\\ms-windows-store*")]
 [process where event.action == "start" and process.parent.name : "WSReset.exe" and
  process.Ext.token.integrity_level_name == "high" and
  not process.executable :
           ("?:\\Windows\\System32\\WerFault.exe",
            "?:\\Windows\\SysWOW64\\WerFault.exe",
            "?:\\Windows\\System32\\mmc.exe",
            "?:\\Windows\\SysWOW64\\mmc.exe",
            "?:\\Windows\\system32\\conhost.exe",
            "?:\\Windows\\SysWOW6\\conhost.exe")]

Field Validations

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