Uncommon Extension In Keyboard Layout IME File Registry Value
Detects usage of Windows Input Method Editor (IME) keyboard layout feature, which allows an attacker to load a DLL into the process after sending the WM_INPUTLANGCHANGEREQUEST message. Before doing this, the client needs to register the DLL in a special registry key that is assumed to implement this keyboard layout. This registry key should store a value named "Ime File" with a DLL path. IMEs are essential for languages that have more characters than can be represented on a standard keyboard, such as Chinese, Japanese, and Korean.
Convert In Phoenix Studio
Open this Sigma rule in the converter with the YAML preloaded and ready for backend selection.
detection:
selection:
TargetObject|contains|all:
- '\Control\Keyboard Layouts\'
- 'Ime File'
filter_main_known_extension:
Details|endswith: '.ime'
condition: selection and not 1 of filter_main_*IMEs are essential for languages that have more characters than can be represented on a standard keyboard, such as Chinese, Japanese, and Korean.
Tactics
Sub-techniques