Microsoft’s free tool, Process Explorer (from Sysinternals), is better than Task Manager. Run it, find mlg.exe , and look at the "Company Name" column.
If you just want the sound effects, safer alternatives include the MLG SoundBoard 2024 on Google Play or the MLG Soundboard Ultimate Memes on the App Store. Scan an item with Windows Security - Microsoft Support mlg.exe download
If "mlg.exe" relates to a specific software or tool, you might find it through: Microsoft’s free tool