THREAT REMOVAL

WebCobra Miner Virus – How to Remove It

This blog post has been created to help explain what is the WebCobra miner app and how you can try and remove it and prevent it from mining ZCash or Monero cryptocurrencies on your Mac.

A new, very dangerous cryptocurrency miner virus has been detected by security researchers. The malware, called WebCobra comes as an app, which experts believe to be installed as a result of software bundling. The main idea behind the WebCobra miner is to employ cryptocurrency miner activities on the computers of victims in order to obtain Monero and ZCash tokens at victims’ expense. The outcome of this miner is the elevated electricity bills and if you leave it for longer periods of time WebCobra may even damage your computer’s components.

Threat Summary

Name WebCobra Miner Virus
Type Cryptocurrency Miner Virus
Short Description A crypto miner that aims to use the resources of your computer to mine for cryptocurrencies.
Symptoms Your computer may experience slow-downs, overheating, suspicious processes running and other types of unwanted side effects..
Distribution Method Bundled downloads. Web pages which may advertise it.
Detection Tool See If Your System Has Been Affected by malware

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Malware Removal Tool

User Experience Join Our Forum to Discuss WebCobra Miner Virus.

WebCobra – Distribution Methods

The primary methods of distribution used by WebCobra have been reported by users to be via either fake Microsoft websites or software bundling.

If the installer of WebCobra is spread via a fake site, the virus may pretend to be a Microsoft installer package that will check the computer’s runtime environment. In the same time, the installer may start to check and execute the miner codes.

Another method of infection with WebCobra is if the program pretends to be a legitimate type of program, that is bundled in the setups of other free apps downloaded from suspicious websites. Such seemingly free apps may be useful apps that are used in a very often basis. These applications often have their installers modified by users with various different purposes, the outcome of which is to get them to accept the installation of WebCobra with the hopes to miss it’s installation prompt. This prompt is usually located in the “Advanced” or “Custom” installation options, the main idea of which is to get users to skip it’s install steps. But if the user sees it, the program is advertised as “an optional offer” or “a free extra” to the current installation and this is how it ends up on their computers.

WebCobra Miner – Analysis

Similar to other [wplinkpreview url=”https://sensorstechforum.com/bitcoin-miner-virus-detect-remove-it/”]crypto miners we have detected over the years, the WebCobra miner performs multiple malicious activities on the computers of victims. Once an initial infection has commenced, the malware drops a .zip file, called ERDNT.LOG.zip. This .zip file extracts a password-protected Cabinet archive to unzip it. The procedure is done via command prompt by entering the following Windows command:

→ “cmd” /c “CD [WindowsFolder]\{A0BB5888-2851-4724-9666-8998623D6EA7}\&unzip –o –P iso100 ERDNT.LOG.zip

The Cabinet (.CAB) file unpacks two types of files:

  • A LOC file which is a DLL file that decrypts the second file.
  • A .bin file which is decrypted by the LOC file and executes the malicious payload.

The CAB file also uses the following commands in order to execute ERDNT.LOC:

→ “cmd” /v:on /c “set rnd=%random%&mkdir [WindowsFolder]\{DE03ECBA-2A77-438C-8243-0AF592BDBB20}\!rnd!&cd
[WindowsFolder]\{DE03ECBA-2A77-438C-8243-0AF592BDBB20}\!rnd!&move /y
[WindowsFolder]\{DE03ECBA-2A77-438C-8243-0AF592BDBB20}\*.*
[WindowsFolder]\{DE03ECBA-2A77-438C-8243-0AF592BDBB20}\!rnd!\&RundLL32ERDNT.LOC,TModuleEntry u”

After it’s executed, this script of command directly executes the malicious ERDNT.LOG (DLL) file and DATA.BIN file to begin it’s mining operation of Monero and Zcash, where it does the following:

To mine Monero (on x86 machines), the virus injects a script in Svchost.exe where it runs a cryptonight miner by connecting to emergency.fee.xmrig.com and miner.fee.xmrig.com pools.

To mine for ZCash (on x64 machines), the virus executes a direct connection to saarnio.ru/ln.zip and downloads Claymore’s ZCash Miner configuration file which then connects to the eu.zec.slushpool.com mining pool.

The outcome of these mining activities on your computer are the following:

  • It may immediately start to slow down in terms of performance.
  • Your PC may start to freeze at time.
  • Internet connection on your network may freeze.
  • Your components (CPU, GPU) may overheat.

Once the WebCobra miner has been executed, it immediately starts to check if it’s running in a isolated environment. If not, then the miner virus may connect to the following IP addresses:

  • 149.249.13:2224
  • 149.254.170:2223
  • 31.92.212

The WebCobra malware is also identified by McAfee with the following SHA256 hashes:

→ 5E14478931E31CF804E08A09E8DFFD091DB9ABD684926792DBEBEA9B827C9F37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Furthermore, WebCobra can also perform the following malicious activities on your PC, besides mining:

  • Locate and read your files.
  • Interact with Windows via Command Prompt.
  • Extract data from your local system.
  • Discover what processes are running.
  • Read your system information.
  • Inject processes.
  • Encrypt data.
  • Obfuscate data.
  • Delete files.

Removal of WebCobra miner is strongly recommended, since you risk not only a big electricity bill if it’s running on your PC, but the miner may also perform other unwanted activities on it and even damage your PC permanently.

Remove WebCobra Miner from Your PC

If you want to remove this miner from your Mac, be advised that it can delete your files. This is why, we advise you to backup all your important files if on your PC before removing this virus.

To remove WebCobra miner automatically from your PC, we advise you to follow the removal manual below. It is separated In manual and automatic removal, since this will effectively help delete the virus files permanently. If manual removal does not help, however, we recommend what most researchers advise and that is to download an advanced anti-malware software to run a scan with it on your infected PC. Such program will automatically take care of the WebCobra miner virus from your computer and will make sure that it’s removed completely plus your PC stays protected in the future too.

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Ventsislav Krastev

Ventsislav is a cybersecurity expert at SensorsTechForum since 2015. He has been researching, covering, helping victims with the latest malware infections plus testing and reviewing software and the newest tech developments. Having graduated Marketing as well, Ventsislav also has passion for learning new shifts and innovations in cybersecurity that become game changers. After studying Value Chain Management, Network Administration and Computer Administration of System Applications, he found his true calling within the cybersecrurity industry and is a strong believer in the education of every user towards online safety and security.

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Windows Mac OS X Google Chrome Mozilla Firefox Microsoft Edge Safari Internet Explorer

How to Remove WebCobra Miner Virus from Windows.


Step 1: Boot Your PC In Safe Mode to isolate and remove WebCobra Miner Virus

OFFER

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 WebCobra Miner Virus 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 WebCobra Miner Virus 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 WebCobra Miner Virus 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.

IMPORTANT!
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 WebCobra Miner Virus 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.

SpyHunter5-update-2018


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

SpyHunter5-Free-Scan-2018


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.

SpyHunter-5-Free-Scan-Next-2018

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


Windows Mac OS X Google Chrome Mozilla Firefox Microsoft Edge Safari Internet Explorer

Get rid of WebCobra Miner Virus from Mac OS X.


Step 1: Uninstall WebCobra Miner Virus and remove related files and objects

OFFER
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 WebCobra Miner Virus:

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 WebCobra Miner Virus. 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 WebCobra Miner Virus. 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 WebCobra Miner Virus 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 WebCobra Miner Virus. 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
/Library/LaunchDaemons

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


Step 2: Scan for and remove malware from your Mac

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



Windows Mac OS X Google Chrome Mozilla Firefox Microsoft Edge Safari Internet Explorer


Remove WebCobra Miner Virus 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


Erase WebCobra Miner Virus 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


Uninstall WebCobra Miner Virus 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


Remove WebCobra Miner Virus 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.

stf-safari-extensions


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 WebCobra Miner Virus 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


Eliminate WebCobra Miner Virus 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.


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