MITRE CAR unknown stable spl

Disable UAC

Threat actors often, after compromising a machine, try to disable User Access Control (UAC) to escalate privileges. This is often done by changing the registry key for system policies using “reg.exe”, a legitimate tool provided by Microsoft for modifying the registry via command prompt or scripts. This action interferes with UAC and may enable a threat actor to escalate privileges on the compromised system, thereby allowing further exploitation of the system.

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Detection Logic

sourcetype = __your_sysmon_index__ ParentImage = "C:\\Windows\\System32\\cmd.exe"
| where like(CommandLine,"reg.exe%HKLM\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Policies\\System%REG_DWORD /d 0%")

Field Validations

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