Short bio

Trojan.Sefnit is Malwarebytes’ detection name for a family of Trojans that operate as a backdoor, allowing remote access to Windows systems.

Type and source of infection

Trojan.Sefnit is also capable of using your computer for Bitcoin mining, click fraud, and to hijack the victim’s search results.

There are several ways this Trojan can land on a system, including via P2P file sharing, bundlers, or being dropped by other malware.


Malwarebytes protects users from Trojan.Sefnit by using real-time protection.

block Trojan.Sefnit

Malwarebytes blocks Trojan.Sefnit


Malwarebytes can detect and remove Trojan.Sefnit without further user interaction.

  1. Please download Malwarebytes to your desktop.
  2. Double-click mb3-setup-consumer-{version}.exe and follow the prompts to install the program.
  3. Then click Finish.
  4. Once the program has fully updated, select Scan Now on the Dashboard. Or select the Threat Scan from the Scan menu.
  5. If another update of the definitions is available, it will be implemented before the rest of the scanning procedure.
  6. When the scan is complete, make sure that All Threats are selected, and click Remove Selected.
  7. Restart your computer when prompted to do so.

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