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UAC Bypass via Unsafe Deserialization in Event Viewer

Identifies attempts to bypass User Account Control (UAC) via Unsafe .Net Deserialization in Windows Event Viewer. Attackers bypass UAC to stealthily execute code with elevated permissions.

View Source

Detection Logic

file where event.action != "deletion" and file.name : "RecentViews" and
 file.path : "?:\\Users\\*\\AppData\\*\\Microsoft\\Event Viewer\\RecentViews" and
 process.executable != null and
 not process.executable :
            ("?:\\Windows\\System32\\mmc.exe",
             "?:\\Windows\\SysWOW64\\mmc.exe",
             "?:\\Windows\\System32\\svchost.exe",
             "?:\\Windows\\Explorer.exe",
             "?:\\Program Files\\Citrix\\User Profile Manager\\UserProfileManager.exe",
             "?:\\ProgramData\\ForensiT\\Transwiz\\Deployment Files\\Transwiz.exe",
             "?:\\Windows\\WinSxS\\*\\mmc.exe",
             "?:\\Program Files\\*.exe",
             "?:\\Program Files (x86)\\*.exe",
             "?:\\Windows\\System32\\dllhost.exe",
             "?:\\Windows\\System32\\taskhost.exe") and
 not user.id : ("S-1-5-18", "S-1-5-19", "S-1-5-20") and 
 not (process.code_signature.subject_name : "ForensiT Limited" and process.code_signature.trusted == true)

Field Validations

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