Detectionmediumexperimental
System Language Discovery via Reg.Exe
Detects the usage of Reg.Exe to query system language settings. Attackers may discover the system language to determine the geographic location of victims, customize payloads for specific regions, or avoid targeting certain locales to evade detection.
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Launch
Log Source
WindowsProcess Creation
ProductWindows← raw: windows
CategoryProcess Creation← raw: process_creation
Events generated when a new process is spawned on the system. Covers command-line arguments, parent/child relationships, and process metadata.
Detection Logic
Detection Logic2 selectors
detection:
selection_img:
- Image|endswith: '\reg.exe'
- OriginalFileName: 'reg.exe'
selection_cli:
CommandLine|contains|all:
- 'query'
- 'Control\Nls\Language'
condition: all of selection_*False Positives
Unknown
False positive likelihood has not been assessed. Additional context may be needed during triage.
References
Testing & Validation
Simulations
atomic-red-teamT1614.001
View on ARTDiscover System Language by Registry Query
GUID: 631d4cf1-42c9-4209-8fe9-6bd4de9421be
MITRE ATT&CK
Tactics
Sub-techniques
Rule Metadata
Rule ID
c43a5405-e8e1-4221-9ac9-dbe3fa14e886
Status
experimental
Level
medium
Type
Detection
Created
Fri Jan 09
Path
rules/windows/process_creation/proc_creation_win_reg_system_language_discovery.yml
Raw Tags
attack.discoveryattack.t1614.001