PUP.Optional.InstallCore

PUP.Optional.InstallCore is deemed as potentially unwanted program that performs malicious actions once installed on the computer. This detection by Malwarebytes Anti-Malware program is given to specific software that user may optionally install together with third-party application. However, due to lack of notification during the install process, PUP.Optional.InstallCore often gets into the PC without user’s knowledge. Thus, you may see unwanted program on the computer without a notice.

Threat behavior

Installation

In usual situation, PUP.Optional.InstallCore is bundled to freeware or shareware applications. In fact, there may be other unwanted programs that are packed to the main software that users preferred to obtain. Authors behind malicious programs are utilizing pay-per-install scheme to deploy their products over the Internet.

There are also instances that malware are being used to deploy PUP.Optional.InstallCore. In this case, the threat can be acquired when visiting malicious web pages, downloading compromised files, or using file-sharing apps. Links from spam emails and social media sites are also one medium consumed by attacker to spread PUP.Optional.InstallCore.

Payload

Once PUP.Optional.InstallCore is run on the computer, it targets mostly known browsers like Internet Explorer, Google Chrome, Mozilla Firefox, and Safari. This threat performs changes on browser settings that may result to home page hijacking and browser redirect problems. PUP.Optional.InstallCore also drops extension, add-on, and plug-in to achieve other malicious tasks.

To start instantly when browser is opened, PUP.Optional.InstallCore installs itself as browser helper object. This also gives the malware to have control on the browser and install its own search engine and toolbar object.

Symptoms

Presence of PUP.Optional.InstallCore affects your installed browser program. Here are some obvious signs that the malware has invaded the computer.

  • Modified start page, home page or search engine
  • Constant redirect to unwanted web sites
  • Excessive display of pop-up advertisements
  • Browser and new tabs opens on its own

Presence of the following files indicates that computer is infected with PUP.Optional.InstallCore:

  • C:\Users\Owner\Downloads\UltimateCodec.exe

How can you remove PUP.Optional.InstallCore?

To totally remove PUP.Optional.InstallCore from the computer and get rid of relevant adware, please execute the procedures as stated on this page. Make sure that you have completely scan the system with suggested malware removal tools and virus scanners.

Step 1 : Scan the computer with Malwarebytes Anti-Malware

1. Download Malwarebytes Anti-Malware from the link below. Save the file on your hard drive.

2. Once the download completes, double-click on the file MBSetup.exe to run the program.

3. Select desired installation package whether for Personal Computer or Work Computer.

4. On next window, click Install button to proceed.

MBAM Default Install

5. Just proceed with the succeeding prompts until it start to execute the installation procedure.

MBAM Installing

6. Installation process will take less than a minute. It should run automatically after completing the setup.

7. When Malwarebytes Anti-Malware interface appears, please select Scan on the menu. The program will check for any available update before proceeding. Do not skip this step. Virus scan may take a while, please wait for the process to finish.

MBAM-threatscan

8. When scanning is done, Malwarebytes Anti-Malware will display the list of identified threats. Remove all and restart the computer to finalized the scan process.

Step 2 : Run AdwCleaner to totally remove PUP.Optional.InstallCore

1. Download the tool called AdwCleaner from the location stated below.

2. Once you have completed the download, please close all running programs on the computer.

3. Locate the file and double-click on adwcleaner.exe to start running the tool.

AdwCleaner

4. It searches for presence of harmful programs, plug-ins, add-ons, or any data that were found malicious and linked to PUP.Optional.InstallCore. You may have to delete each detected item.

5. Once scan is done, the tool may need to reboot your computer to finalize the cleaning process.

6. After reboot, open AdwCleaner once more. Click on Uninstall to remove this program from your computer.

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4 thoughts on “PUP.Optional.InstallCore”

  1. Matthew Tharby

    I had this batched in with Ipadian. I even found out that Ipadian isn’t in uninstall program, so I simply opened the file location and deleted it from there, then deleted it from recycle bin. It’s still here, so Malwarebytes is uninstalling it now.

  2. Sodium Chloride & Piper Nigrum

    That’s because the install stall key is still stuck under your Registry Key for your user account on that system. So even if you remove the files it may replace the files after a reboot!

  3. Mathew Cavaliere Schaak

    Luckily I caught this before it could do anything, thanks for the info.

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