Home > Trojan > Remove the AdKoob Malware — a Facebook Stealing Hybrid Trojan/Hjacker Virus

Remove the AdKoob Malware — a Facebook Stealing Hybrid Trojan/Hjacker Virus

The AdKoob malware is a hybrid Trojan and hijacker virus which has recently been discovered in a global attack campaign. It is distributed using various methods and features many modules that are executed following the infection. Our article gives a detailed overview of the infection process and a full removal guide on deleting the AdKoob malware and restoring the victim computers.

Threat Summary

Name AdKoob
Type Browser Hijacker, Trojan
Short Description The AdKoop malware features an extensive list of modules that are configured to steal user data and modifying sensitive system settings.
Symptoms The victims may not experience any apparent symptoms of infection.
Distribution Method Freeware Installations, Bundled Packages, Scripts and others.
Detection Tool See If Your System Has Been Affected by malware


Malware Removal Tool

User Experience Join Our Forum to Discuss AdKoob.

AdKoob Malware – Distribution Methods

The research into the AdKoob malware began when security experts detected suspicious behavior of a legitimate Windows binary file (svchost.exe). During the investigation the experts were able to identify a new threat resulting in AdKoob’s discovery. This clearly shows that there is an advanced delivery method used to spread the initial payloads leading to the infection. There are several possible scenarios how this can be achieved.

The first method is the coordination of SPAM email campaigns that utilize various phishing techniques. A typical message includes design elements taken from famous companies or Internet services attempting to coerce the victim uses into interacting with the malicous element. The AdKoob malware payload file can be either attached or linked in the body contents.

The other strategy is to create fake download sites that are used to host the malicious instances. Usually virus files that contain the AdKoob malware come under the form of infected payloads. Two main types are the following:

  • Infected Documents —The hackers can bundle the AdKoob payload into scripts that are embedded in documents: rich text documents, spreadsheets or presentations. When they are opened by the victims a notification prompt will appear asking the users to enable the macros. If this is done the infection sequence will be started.
  • Malware Software Installers — Using a similar method the criminals can download the legitimate setup files of popular software. This is software that is frequently used by the users: productivity apps, creativity suites or system utilities. The resulting installers are then uploaded to the fake download portals or linked in the email messages.

Likewise the criminals behind the AdKoob malware can embed various malicious scripts to redirect the users to the malicious files. There are many examples: scripts, redirects, in-line hyperlinks, banner ads or pop-ups.

Advanced campaigns can take advantage of browser hijackers — they represent malicious extensions made for the most popular web browsers. The hackers utilize fake developer credentials and user reviews along with an elaborate description of the item. This isused to coerce the victims into installing it. The most likely places to find such pieces of malware are the fake download portals or the official plugin repositories. Once installed these malicious extensions follow a common behavior pattern — first they will modify the default settings (home page, search engine or the new tabs page). This is followed by the virus infection and any other malware actions configured by the hackers.

AdKoob Malware – Detailed Description

Warning! The AdKoob malware is considered a Trojan/Hijacker hybrid threat.

The security analysis of the AdKoob malware shows that attack sequence follows a multi-stage behavior pattern. The payload is made up of an open-source UPX packer or a custom injector. The next step is to inject the malware code into the service host process.

Following the successful infection the AdKoob malware will present a fake error message in an application frame “Unable To Locate Component” with the following contents:

The configuration file is missing. Re-installing Easy Backup may fix this problem.

This shows that the captured sample may be distributed via a malicious software installer for a backup software. The analysis shows that the main malicious engine performs a security check looking for a specific string in the %appdata% service folder. This is related to the configuration of the virus to run only once.

The engine ha been found to execute a stealth protection module which protects the AdKoob malware from discovery. It will scan the system for the presence of anti-virus programs, sandbox environments, virtual machines and other software that can interfere with its correct execution. The associated real-time engines may be disabled and the programs completely removed.

Once this is complete the virus engine will proceed with the first stage of the actual malicious process. It will start to analyze the Windows Registry and hijack sensitive data about the host and the users. There are two main groups of data that are usually categorized:

  • Personal Data — It is made up of information that can reveal details about the user and expose their identity. This includes data sets such as their real name, interests, phone number, location and stored account credentials.
  • Campaign Metrics — This data set consists of information that is useful for optimizing the attacks. It is usually made up of reports that give details on the installed hardware components and certain operating system values on the compromised machines.

Depending on the installed and targeted web browsers AdKoob uses different infiltration techniques. For older versions of Mozilla Firefox and Google Chrome the malicious engine attempts a SQL query against the built-in databases. Newer versions of Mozilla Firefox utilizes another method — they store the account credentials within a JSON file. The AdKoob malware contains code that can specifically query and extract this information. Internet Explorer browsers store some values from the Windows Registry. It can also use specific credentials to exfiltrate the sensitive data.

This browser hijacker behavior is merely the first part of the malware’s behavior pattern. Following this the virus will continue with a Trojan module. It determines the public IP address of the infected host by making a request to a service Internet. A secured connection is made to a hacker-controlled command and control servers. This reports the infection, the decrypted stream contains the following values:

  • Unique Machine Identifier
  • Operating System Version
  • Public IP
  • Local timezone of the victim’s machine
  • Browser Identifier String
  • Browser User Agent
  • Base64 Encoded Credentials
  • Bot Identifier

AdKoob Malware – Trojan Operations

Once the Trojan engine has started it looks for active Facebook sessions. It establishes a connection originating from the victim’s profiles. There are two main methods that are used to run this operation:

  1. Stored Authentication Cookies — This is achieved when the AdKoob malware has been able to find the cookies via a data harvesting infiltration.
  2. Browser Credentials Theft — The AdKoob malware attempts to login to the services if it has already acquired the credentials for Facebook.

It appears that there are several specific types of information that are looked up by the malware:

  • Facebook Locale — This is the parameter which is used to define the user’s set language and region.
  • Facebook User ID — A string which is used to connect the Facebook users to the social service.
  • Facebook Profile Username — The usernames chosen by the users.
  • User Information — This includes all data sets that are posted by the users and are displayed om their profiles: their real name, location, birthday, contact information and etc.
  • Facebook Pages — This includes a list of the Facebook pages have been created by the user.

The AdKoob malware then continues further by interacting with an interface that makes a series of requests related to paid advertisement campaigns. When used by companies the AdKoob can be used to deliver personalized, targeted or mass ad campaigns on the infected hosts. The administrative panel allows the operators to coordinate targeted ads. The menu options present various options and specific parameters that can be toggled.

The underlying engine that is responsible for these actions uses a two-direction request and reply method. The infected hosts reports information about the accessed ad pages, while the server instance gives specific instructions on the chosen pages. This leads to the construction of a specific account ID that as a result creates a query to the Facebook Graph API — an API interface that is used to query data from a Facebook account. The query results in data about the ad campaigns — name, spent money and budget limit.

This fact gives security researchers the notion that AdKoop operators are targeting business users. This comes from the premise that regular home users are not likely to use Facebook advertisement campaigns. The harvested information is exfiltrated and sent to the C&C servers.

Following the successful execution of all components the AdKoob malware will remove all traces of itself and leave a specific marker file that ensures that the virus is not run twice.

Martin Beltov

Martin graduated with a degree in Publishing from Sofia University. As a cyber security enthusiast he enjoys writing about the latest threats and mechanisms of intrusion.

More Posts

Follow Me:

Windows Mac OS X Google Chrome Mozilla Firefox Microsoft Edge Safari Internet Explorer Stop Push Pop-ups

About the AdKoob Research

The content we publish on SensorsTechForum.com, this AdKoob how-to removal guide included, is the outcome of extensive research, hard work and our team’s devotion to help you remove the specific, adware-related problem, and restore your browser and computer system.

How did we conduct the research on AdKoob?

Please note that our research is based on independent investigation. We are in contact with independent security researchers, thanks to which we receive daily updates on the latest malware, adware, and browser hijacker definitions.
Furthermore, the research behind the AdKoob threat is backed with VirusTotal https://www.virustotal.com/gui/home/upload.
To better understand this online threat, please refer to the following articles which provide knowledgeable details.


1.Browser Redirect – What Is It?
2.Adware Is Malicious, and It Uses Advanced Techniques to Infect
3.The Thin Red Line Between Potentially Unwanted Programs and Malware
4.The Pay-Per-Install Affiliate Business – Making Millions out of Adware
5.Malicious Firefox Extensions Installed by 455,000 Users Blocked Updates

How to Remove AdKoob from Windows.

Step 1: Boot Your PC In Safe Mode to isolate and remove AdKoob


Manual Removal Usually Takes Time and You Risk Damaging Your Files If Not Careful!
We Recommend To Scan Your PC with SpyHunter

Keep in mind, that SpyHunter’s scanner is only for malware detection. If SpyHunter detects malware on your PC, you will need to purchase SpyHunter's malware removal tool to remove the malware threats. Read our SpyHunter 5 review. Click on the corresponding links to check SpyHunter's EULA, Privacy Policy and Threat Assessment Criteria

1. Hold Windows key + R

2. The "Run" Window will appear. In it, type "msconfig" and click OK.

3. Go to the "Boot" tab. There select "Safe Boot" and then click "Apply" and "OK".
Tip: Make sure to reverse those changes by unticking Safe Boot after that, because your system will always boot in Safe Boot from now on.

4. When prompted, click on "Restart" to go into Safe Mode.

5. You can recognise Safe Mode by the words written on the corners of your screen.

Step 2: Uninstall AdKoob and related software from Windows

Here is a method in few easy steps that should be able to uninstall most programs. No matter if you are using Windows 10, 8, 7, Vista or XP, those steps will get the job done. Dragging the program or its folder to the recycle bin can be a very bad decision. If you do that, bits and pieces of the program are left behind, and that can lead to unstable work of your PC, errors with the file type associations and other unpleasant activities. The proper way to get a program off your computer is to Uninstall it. To do that:

1. Hold the Windows Logo Button and "R" on your keyboard. A Pop-up window will appear.

2. In the field type in "appwiz.cpl" and press ENTER.

3. This will open a window with all the programs installed on the PC. Select the program that you want to remove, and press "Uninstall"
Follow the instructions above and you will successfully uninstall most programs.

Step 3: Clean any registries, created by AdKoob on your computer.

The usually targeted registries of Windows machines are the following:

  • HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run
  • HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
  • HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\RunOnce
  • HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\RunOnce

You can access them by opening the Windows registry editor and deleting any values, created by AdKoob there. This can happen by following the steps underneath:

1. Open the Run Window again, type "regedit" and click OK.

2. When you open it, you can freely navigate to the Run and RunOnce keys, whose locations are shown above.

3. You can remove the value of the virus by right-clicking on it and removing it.

Tip: To find a virus-created value, you can right-click on it and click "Modify" to see which file it is set to run. If this is the virus file location, remove the value.

Before starting "Step 4", please boot back into Normal mode, in case you are currently in Safe Mode.
This will enable you to install and use SpyHunter 5 successfully.

Step 4: Scan for AdKoob with SpyHunter Anti-Malware Tool

1. Click on the "Download" button to proceed to SpyHunter's download page.

It is recommended to run a scan before purchasing the full version of the software to make sure that the current version of the malware can be detected by SpyHunter. Click on the corresponding links to check SpyHunter's EULA, Privacy Policy and Threat Assessment Criteria.

2. After you have installed SpyHunter, wait for it to update automatically.


3. After the update process has finished, click on the 'Malware/PC Scan' tab. A new window will appear. Click on 'Start Scan'.


4. After SpyHunter has finished scanning your PC for any files of the associated threat and found them, you can try to get them removed automatically and permanently by clicking on the 'Next' button.


If any threats have been removed, it is highly recommended to restart your PC.

Video Removal Guide for AdKoob (Windows).

Windows Mac OS X Google Chrome Mozilla Firefox Microsoft Edge Safari Internet Explorer Stop Push Pop-ups

Get rid of AdKoob from Mac OS X.

Step 1: Uninstall AdKoob and remove related files and objects

Manual Removal Usually Takes Time and You Risk Damaging Your Files If Not Careful!
We Recommend To Scan Your Mac with SpyHunter for Mac
Keep in mind, that SpyHunter for Mac needs to purchased to remove the malware threats. Click on the corresponding links to check SpyHunter’s EULA and Privacy Policy

1.Hit the ⇧+⌘+U keys to open Utilities. Another way is to click on “Go” and then click “Utilities”, like the image below shows:

2. Find Activity Monitor and double-click it:

3.In the Activity Monitor look for any suspicious processes, belonging or related to AdKoob:

Tip: To quit a process completely, choose the “Force Quit” option.

4.Click on the "Go" button again, but this time select Applications. Another way is with the ⇧+⌘+A buttons.

5.In the Applications menu, look for any suspicious app or an app with a name, similar or identical to AdKoob. If you find it, right-click on the app and select “Move to Trash”.

6: Select Accounts, after which click on the Login Items preference.

Your Mac will then show you a list of items that start automatically when you log in. Look for any suspicious apps identical or similar to AdKoob. Check the app you want to stop from running automatically and then select on the Minus (“-“) icon to hide it.

7: Remove any left-over files that might be related to this threat manually by following the sub-steps below:

  • Go to Finder.
  • In the search bar type the name of the app that you want to remove.
  • Above the search bar change the two drop down menus to “System Files” and “Are Included” so that you can see all of the files associated with the application you want to remove. Bear in mind that some of the files may not be related to the app so be very careful which files you delete.
  • If all of the files are related, hold the ⌘+A buttons to select them and then drive them to “Trash”.

In case you cannot remove AdKoob via Step 1 above:

In case you cannot find the virus files and objects in your Applications or other places we have shown above, you can manually look for them in the Libraries of your Mac. But before doing this, please read the disclaimer below:

Disclaimer! If you are about to tamper with Library files on Mac, be sure to know the name of the virus file, because if you delete the wrong file, it may cause irreversible damage to your MacOS. Continue on your own responsibility!

1: Click on "Go" and Then "Go to Folder" as shown underneath:

2: Type in "/Library/LauchAgents/" and click Ok:

3: Delete all of the virus files that have similar or the same name as AdKoob. If you believe there is no such file, do not delete anything.

You can repeat the same procedure with the following other Library directories:

→ ~/Library/LaunchAgents

Tip: ~ is there on purpose, because it leads to more LaunchAgents.

Step 2: Scan for and remove AdKoob files from your Mac

When you are facing problems on your Mac as a result of unwanted scripts and programs such as AdKoob, the recommended way of eliminating the threat is by using an anti-malware program. SpyHunter for Mac offers advanced security features along with other modules that will improve your Mac’s security and protect it in the future.

Click the button below below to download SpyHunter for Mac and scan for AdKoob:


SpyHunter for Mac

Video Removal Guide for AdKoob (Mac)

Windows Mac OS X Google Chrome Mozilla Firefox Microsoft Edge Safari Internet Explorer Stop Push Pop-ups

Remove AdKoob from Google Chrome.

Step 1: Start Google Chrome and open the drop menu

Step 2:Move the cursor over "Tools" and then from the extended menu choose "Extensions"

Step 3: From the opened "Extensions" menu locate the unwanted extension and click on its "Remove" button.

Step 4: After the extension is removed, restart Google Chrome by closing it from the red "X" button at the top right corner and start it again.

Windows Mac OS X Google Chrome Mozilla Firefox Microsoft Edge Safari Internet Explorer Stop Push Pop-ups

Erase AdKoob from Mozilla Firefox.

Step 1: Start Mozilla Firefox. Open the menu window

Step 2: Select the "Add-ons" icon from the menu.

Step 3: Select the unwanted extension and click "Remove"

Step 4: After the extension is removed, restart Mozilla Firefox by closing it from the red "X" button at the top right corner and start it again.

Windows Mac OS X Google Chrome Mozilla Firefox Microsoft Edge Safari Internet Explorer Stop Push Pop-ups

Uninstall AdKoob from Microsoft Edge.

Step 1: Start Edge browser.

Step 2: Open the drop menu by clicking on the icon at the top right corner.

Step 3: From the drop menu select "Extensions".

Step 4: Choose the suspected malicious extension you want to remove and then click on the gear icon.

Step 5: Remove the malicious extension by scrolling down and then clicking on Uninstall.

Windows Mac OS X Google Chrome Mozilla Firefox Microsoft Edge Safari Internet Explorer Stop Push Pop-ups

Remove AdKoob from Safari.

Step 1: Start the Safari app.

Step 2: After hovering your mouse cursor to the top of the screen, click on the Safari text to open its drop down menu.

Step 3: From the menu, click on "Preferences".

stf-safari preferences

Step 4: After that, select the 'Extensions' Tab.


Step 5: Click once on the extension you want to remove.

Step 6: Click 'Uninstall'.

stf-safari uninstall

A pop-up window will appear asking for confirmation to uninstall the extension. Select 'Uninstall' again, and the AdKoob will be removed.

How to Reset Safari
IMPORTANT: Before resetting Safari make sure you back up all your saved passwords within the browser in case you forget them.

Start Safari and then click on the gear leaver icon.

Click the Reset Safari button and you will reset the browser.

Windows Mac OS X Google Chrome Mozilla Firefox Microsoft Edge Safari Internet Explorer Stop Push Pop-ups

Eliminate AdKoob from Internet Explorer.

Step 1: Start Internet Explorer.

Step 2: Click on the gear icon labeled 'Tools' to open the drop menu and select 'Manage Add-ons'

Step 3: In the 'Manage Add-ons' window.

Step 4: Select the extension you want to remove and then click 'Disable'. A pop-up window will appear to inform you that you are about to disable the selected extension, and some more add-ons might be disabled as well. Leave all the boxes checked, and click 'Disable'.

Step 5: After the unwanted extension has been removed, restart Internet Explorer by closing it from the red 'X' button located at the top right corner and start it again.

Remove Push Notifications caused by AdKoob from Your Browsers.

Turn Off Push Notifications from Google Chrome

To disable any Push Notices from Google Chrome browser, please follow the steps below:

Step 1: Go to Settings in Chrome.


Step 2: In Settings, select “Advanced Settings”:

advanced settings

Step 3: Click “Content Settings”:

Content Settings

Step 4: Open “Notifications”:


Step 5: Click the three dots and choose Block, Edit or Remove options:

Block, Edit or Remove

Remove Push Notifications on Firefox

Step 1: Go to Firefox Options.


Step 2: Go to “Settings”, type “notifications” in the search bar and click "Settings":


Step 3: Click “Remove” on any site you wish notifications gone and click “Save Changes”

remove push notifications firefox

Stop Push Notifications on Opera

Step 1: In Opera, press ALT+P to go to Settings.


Step 2: In Setting search, type “Content” to go to Content Settings.

content settings

Step 3: Open Notifications:


Step 4: Do the same as you did with Google Chrome (explained below):

three dots

Eliminate Push Notifications on Safari

Step 1: Open Safari Preferences.


Step 2: Choose the domain from where you like push pop-ups gone and change to "Deny" from "Allow".

AdKoob FAQ

What is AdKoob?

The AdKoob threat is adware or browser redirect virus. It may slow your computer down siginficantly and display advertisements. The main idea is for your information to likely get stolen or more ads to appear on your device.

The creators of such unwanted apps work with pay-per-click schemes to get your computer to visit risky or different types of websites that may generate them funds. This is why they do not even care what types of websites show up on the ads. This makes their unwanted software indirectly risky for your OS.

What are the symptoms of AdKoob?

There are several symptoms to look for when this particular threat and also unwanted apps in general are active:

Symptom #1: Your computer may become slow and has poor performance in general.

Symtpom #2: You have toolbars, add-ons or extensions on your web browsers that you don't remember adding.

Symptom #3: You see all types of ads, like ad-supported search results, pop-ups and redirects to randomly appear.

Symptom #4: You see installed apps on your Mac running automatically and you do not remember installing them.

Symptom #5: You see suspicious processes running in your Task Manager.

If you see one or more of those symptoms, then security experts reccomend that you check your computer for viruses.

What types of Unwanted Programs are there?

According to most malware researchers and cyber-security experts, the threats that can currently affect your Mac can be the following types:

  • Rogue Antivirus programs.
  • Adware.
  • Browser hijackers.
  • Clickers.
  • Fake optimizers.

What to do if I have a "virus" like AdKoob?

Do not panic! You can easily get rid of most adware or unwanted program threats by firstly isolating them and then removing them from your browser and computer. One reccomended way to do that is by using a reputable malware removal software that can take care of the removal automatically for you. There are many anti-malware apps out there that you can choose from. SpyHunter is one of the reccomended anti-malware apps, that can scan your computer for free and detect any viruses, tracking cookies and unwanted adware apps and eliminate them quickly. This saves time when compared to doing the removal manually.

How to secure my passwords and other data from AdKoob?

With few simple actions. First and foremost, it is imperative that you follow these steps:

Step 1: Find a safe computer and connect it to another network, not the one that your Mac was infected in.

Step 2: Change all of your passwords, starting from your e-mail passwords.

Step 3: Enable two-factor authentication for protection of your important accounts.

Step 4: Call your bank to change your credit card details (secret code, etc.) if you have saved your credit card for online shopping or have done online activiites with your card.

Step 5: Make sure to call your ISP (Internet provider or carrier) and ask them to change your IP address.

Step 6: Change your Wi-Fi password.

Step 7: (Optional): Make sure to scan all of the devices connected to your network for viruses and repeat these steps for them if they are affected.

Step 8: Install anti-malware software with real-time protection on every device you have.

Step 9: Try not to download software from sites you know nothing about and stay away from low-reputation websites in general.

If you follow these reccomendations, your network and all devices will become significantly more secure against any threats or information invasive software and be virus free and protected in the future too.

More tips you can find on our website, where you can also ask any questions and comment underneath the articles about your computer problems. We will try to respond as fast as possible.

Leave a Comment

Your email address will not be published. Required fields are marked *