Short Bio

Trojan.Fileless.MTGen is a generic detection for fileless infections that gain persistence by creating registry keys. In the majority of the cases, these registry keys are designed to run Powershell commands that  carry out the rest of the infection. Other than Powershell, we have also seen the mshta command.

More information about fileless infections can be found in our blog post, Fileless Infections: An Overview.


Some of these Trojans are very difficult to remove. Make sure that the scan for rootkits in Malwarebytes is enabled under “Scan options” on the “Protection” tab.

Associated threats

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