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.
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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