Techniques › T1614.001 › AN1561
AN1561 Analytic 1561
Windows · attack.mitre.org · ATT&CK Enterprise v19.2
<p>Registry access to system language keys (e.g., HKLM\SYSTEM\CurrentControlSet\Control\Nls\Language) or suspicious processes invoking locale-related APIs (e.g., GetUserDefaultUILanguage, GetSystemDefaultUILanguage, GetKeyboardLayoutList). Defender visibility focuses on anomalous or non-standard processes issuing these queries, especially when run by unknown binaries or scripts.</p>
- Detects
- T1614.001 System Language Discovery
- Part of
- DET0565 Detection Strategy for System Language Discovery
Log sources and channels
Exactly as MITRE states them in x_mitre_log_source_references. Where a channel is vague, it is vague in the source; kevmap does not tidy it.
| Log source | Channel | Data component |
|---|---|---|
| WinEventLog:Security | EventCode=4657 | DC0050 Windows Registry Key Access |
| WinEventLog:Sysmon | EventCode=1 | DC0032 Process Creation |
| ETW | Calls to GetUserDefaultUILanguage, GetSystemDefaultUILanguage, GetKeyboardLayoutList | DC0021 OS API Execution |
Mutable elements
Parameters MITRE marks as environment-specific. These are the knobs you are expected to tune; they are why an analytic is not a rule.
| Field | Description |
|---|---|
ParentProcessAllowList | Defines trusted processes allowed to query registry language keys or APIs. Unexpected parent-child process chains may indicate adversary use. |
QueryThreshold | Frequency threshold for language registry or API calls within a set time window. |