PUP.Optional.Vosteran

Short bio

PUP.Optional.Vosteran is a browser hijacker that usually comes in the form of a browser extension. It targets Google Chrome, Mozilla Firefox, Internet Explorer, and Opera and changes the start page and search engine settings.

Vosteran used to bundle their own browser with other software.

Type and source of infection

PUP.Optional.Vosteran is usually installed by the users themselves, whether as a standalone extension or bundled with other software.

Protection

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

Malwarebytes blocks PUP.Optional.Vosteran

Remediation

Malwarebytes can detect and remove PUP.Optional.Vosteran 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:

• Click on the Settings tab in the left pane.
• Click on the Exclusions tab.
• Click the Add Exclusion button.
• Select the exclusion type Exclude a File or Folder and use the Browse button to select the main folder for the software that you wish to keep.
• Repeat this for any secondary folder(s) that belong to the software.
• 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:

• Vosteran.lnk
• vosteran.exe

Associated Threats

• PUP.Optional.Vosteran.A

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