PUP.Optional.Yontoo

Short bio

This detection is for a large family of adware that uses different methods of browser hijacking and monetizing to get their message across. Their search applications are known to bundle “Yahoo Search.”

The bundled installer is usually different from the official one. The bundled installers require arguments for a full installation and are sometimes even aware of running on a virtual machine, both to hinder researchers.

Protection

Malwarebytes protects users from PUP.Optional.Yontoo by using real-time protection.

block PUP.Optional.Yontoo

Malwarebytes blocks PUP.Optional.Yontoo

Remediation

Malwarebytes can detect and remove PUP.Optional.Yontoo 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.

Add an exclusion

Should users wish to keep this program and exclude it from being detected in future scans, they can add the program to the exclusions list. Here’s how to do it.

The Exclusions tab includes a list of items to be excluded from scans. The items may include files, folders, websites, or applications that connect to the Internet, as well as previously detected exploits.

To access the exclusions in Malwarebytes:

If you want to allow the program to connect to the Internet, for example to fetch updates, add an exclusion of the type Exclude an application that Connects to the Internet and use the Browse button to select the file you wish to grant access.

Traces/IOCs

Associated files:

Associated Threats

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