Windows SpeechRuntime Suspicious Child Process

This detection identifies suspicious child processes of SpeechRuntime.exe that could indicate abuse of a vulnerability. SpeechRuntime is vulnerable to an attack that allows a user to run code on another user's session remotely and stealthily by exploiting a Windows COM class. When this class is invoked, it launches SpeechRuntime.exe in the context of the currently logged-on user. Because this COM class is susceptible to COM Hijacking, an attacker can alter the registry remotely to point to a malicious DLL. By dropping that DLL on the target system (e.g., via SMB) and triggering the COM object, the attacker causes the malicious DLL to load into SpeechRuntime.exe and execute under the user's context. The rule specifically looks for SpeechRuntime.exe spawning common command and scripting interpreters or tools used for execution and file transfer.