UnrealCEFSubprocess.exe File and Process

The UnrealCEFSubProcess.exe process belongs to the software of Epic Games or Unreal Engine and is usually found in a subfolder of “C:\Program Files (x86)” such as C:\Program Files (x86)\Epic Games\Launcher\Engine\Binaries\Win64\ or C:\Riot Games\VALORANT\live\Engine\. The folder could belong to a number of different Unreal Engine games.

This program does not have a visible window, nor is it essential for Windows OS. It has been digitally signed. In the vast majority of cases when you encounter this file on your computer, it will be harmless and will belong to the installation files of a game using Unreal Engine.

However, if the file is located in the Windows folder for temporary files, then this rating can be increased to 100%, as it may be a malicious executable posing as the legitimate Unreal Engine file.

You should exercise caution if the file is in a strange location and not inside the directory of a game. A scan using a reliable anti-malware tool should help you determine if the particular instance you found is malicious or not.

How The Legitimate "UnrealCEFSubProcess" Impersonates Malware To Attack Your PC