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Nemesis ransomware virus. How to remove? (Uninstall guide)

removal by Ugnius Kiguolis - - | Type: Ransomware

Nemesis demands 10 Bitcoins for the questionable decryption software

Ransom note by Nemesis virus

Nemesis is a crypto-malware that encrypts files with AES-256 cipher. Following data encryption, it delivers a ransom note called “### DECRYPT MY FILES ###.html” and changes the desktop. In order to get back access to their records, victims are asked to contact cyber criminals via provided email address and pay the ransom.

Originally, the virus appends .v8dp file extension. However, Nemesis virus might also lock files with one of these appendixes:

  • .id-victim’s ID_[TOR website URL].63vc4,
  • .l454t,
  • .id_[victim’s ID]_[webmafia@asia.com].t5019,
  • .id_[victim’s ID]_[Blacklagoon@aolonline.top].nemesis,
  • .id_[victim’s ID]_[pizdoglaz@asia.com].t5019,

When all files are encrypted, malware downloads a ransom note in each of the folders that include corrupted files. Crooks claim that there’s no other chance to recover data but to obtain the Nemesis decryptor. The size of the ransom might vary. However, in most cases, it is around 10 Bitcoins which is a lot. We do not suggest you transfer the money as the felons do not give any guarantees that the data will be returned [1].

Nemesis virus is compared with infamous Cerber ransomware. However, some researchers assume that it can also belong to the same hackers who have been continuously terrorizing the virtual community with @india.com-named viruses. However, they haven't released any announcement yet.

Greek mythology remains a popular theme among hackers. One of the recent malware – Erebus ransomware – also made its appearance on the web this month[2]. One of the reasons explaining such success of these threats is the employment of AES encryption code. Likewise, the creators of Nemesis ransomware stuck to the same method and used AES-256 to encrypt users' files. Due to it, the encrypted data cannot be recovered without a proper decryption key.

Fortunately, security researchers have been working hard to help people avoid making these payments to cyber criminals by releasing legitimate decrypters[3]. We should expect to see Nemesis decrypter in the nearest future.

Despite how menacing each of these ransomware viruses looks, you still have a hope to get your files back. First of all, you need to remove Nemesis from your computer and then proceed to the decryption steps. Start its removal right away with the help of Reimage.

Questions about Nemesis ransomware virus

If you cannot install or update security software, you should check Nemesis removal instructions below. We will help you to disable the virus and run it automatically with the help of reputable security software.

Ransomware has been updated one more time on July 2017

At the end of July, security researchers discovered a brand new variant of Nemesis. It is called as CryptOn and append .id_[victim’s ID]_[pizdoglaz@asia.com].t5019. However, any other significant changes were not detected yet.

This crypto-malware continues spreading using the same distribution tactics. After the infiltration, it delivers the same ransom note with detailed instructions how to obtain Nemesis decryptor. However, victims have to contact crooks via pizdoglaz@asia.com email first.

Undoubtedly, you should not follow these instructions and do not pay the ransom. No one can assure that crooks actually have working decryption software or are willing to give it to you. Keep in mind that having business with cyber criminals may not end up good. Thus, just remove CryptOn or other variants of Nemesis and look up for alternative data recovery options.

Distribution strategies used by the authors of the ransomware

This type of virtual threat usually spreads via two types of channels: spam emails or trojans [4]. The former has remained a popular technique throughout these past years. Though IT experts continuously warn users to remain cautious, users still fall for the bait.

Well-known malware even disguised in the fake emails sent from the Office of Personnel Management as a result of 2014 data breach incident [5]. However, whether it is an official email from a tax institution or police, do not rush to open the attached documents. Otherwise, you might activate Nemesis hijack.

Besides, you should be careful of trojanized ransomware and exploit kits which also deliver crypto-viruses. They usually dwell in compromised file-sharing domains. In order to lower the risk of infection, install a reputable anti-spyware program to deal with the infection.

Terminate Nemesis ransomware from the system

If you are searching for a reliable way to remove Nemesis virus. Install Reimage or Plumbytes Anti-MalwareMalwarebytes Malwarebytes to scan the device. Keep in mind that either of these programs needs to be updated in order for it detects all components of the malware. After that, you may start the file decryption procedure.

More information about Nemesis removal is provided below the instructions. Since there is too little information about this malware yet, it is likely that it might cease the effective performance of the device. In that case, read the below instructions. After the virus is removed, restart the system and re-scan the PC. You can now advance to the file-recovery procedure.

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What to do if failed?
If you failed to remove virus damage using Reimage, submit a question to our support team and provide as much details as possible.
Reimage is recommended to remove virus damage. Free scanner allows you to check whether your PC is infected or not. If you need to remove malware, you have to purchase the licensed version of Reimage malware removal tool.
Alternative Software
Different security software includes different virus database. If you didn’t succeed in finding malware with Reimage, try running alternative scan with Malwarebytes.
Alternative Software
Different security software includes different virus database. If you didn’t succeed in finding malware with Reimage, try running alternative scan with Combo Cleaner.

To remove Nemesis virus, follow these steps:

Remove Nemesis using Safe Mode with Networking

These instructions will help you reaccess your computer and conduct full Nemesis removal.

  • Step 1: Reboot your computer to Safe Mode with Networking

    Windows 7 / Vista / XP
    1. Click Start Shutdown Restart OK.
    2. When your computer becomes active, start pressing F8 multiple times until you see the Advanced Boot Options window.
    3. Select Safe Mode with Networking from the list Select 'Safe Mode with Networking'

    Windows 10 / Windows 8
    1. Press the Power button at the Windows login screen. Now press and hold Shift, which is on your keyboard, and click Restart..
    2. Now select Troubleshoot Advanced options Startup Settings and finally press Restart.
    3. Once your computer becomes active, select Enable Safe Mode with Networking in Startup Settings window. Select 'Enable Safe Mode with Networking'
  • Step 2: Remove Nemesis

    Log in to your infected account and start the browser. Download Reimage or other legitimate anti-spyware program. Update it before a full system scan and remove malicious files that belong to your ransomware and complete Nemesis removal.

If your ransomware is blocking Safe Mode with Networking, try further method.

Remove Nemesis using System Restore

If the virus still lingers in the system, opt for this method.

  • Step 1: Reboot your computer to Safe Mode with Command Prompt

    Windows 7 / Vista / XP
    1. Click Start Shutdown Restart OK.
    2. When your computer becomes active, start pressing F8 multiple times until you see the Advanced Boot Options window.
    3. Select Command Prompt from the list Select 'Safe Mode with Command Prompt'

    Windows 10 / Windows 8
    1. Press the Power button at the Windows login screen. Now press and hold Shift, which is on your keyboard, and click Restart..
    2. Now select Troubleshoot Advanced options Startup Settings and finally press Restart.
    3. Once your computer becomes active, select Enable Safe Mode with Command Prompt in Startup Settings window. Select 'Enable Safe Mode with Command Prompt'
  • Step 2: Restore your system files and settings
    1. Once the Command Prompt window shows up, enter cd restore and click Enter. Enter 'cd restore' without quotes and press 'Enter'
    2. Now type rstrui.exe and press Enter again.. Enter 'rstrui.exe' without quotes and press 'Enter'
    3. When a new window shows up, click Next and select your restore point that is prior the infiltration of Nemesis. After doing that, click Next. When 'System Restore' window shows up, select 'Next' Select your restore point and click 'Next'
    4. Now click Yes to start system restore. Click 'Yes' and start system restore
    Once you restore your system to a previous date, download and scan your computer with Reimage and make sure that Nemesis removal is performed successfully.

Bonus: Recover your data

Guide which is presented above is supposed to help you remove Nemesis from your computer. To recover your encrypted files, we recommend using a detailed guide prepared by 2-spyware.com security experts.

If your files are encrypted by Nemesis, you can use several methods to restore them:

Using Data Recovery Pro to recover files encrypted by Nemesis

It is software which is designed to help netizens find the lost and damaged files. 

  • Download Data Recovery Pro;
  • Follow the steps of Data Recovery Setup and install the program on your computer;
  • Launch it and scan your computer for files encrypted by Nemesis ransomware;
  • Restore them.

Using ShadowExplorer solution to recover encrypted files

This application might be your last chance leading to file recovery. Specifically, the application locates the copies and then recreates the files using the patterns. There is no information whether the malware deletes the copies.

  • Download Shadow Explorer (http://shadowexplorer.com/);
  • Follow a Shadow Explorer Setup Wizard and install this application on your computer;
  • Launch the program and go through the drop down menu on the top left corner to select the disk of your encrypted data. Check what folders are there;
  • Right-click on the folder you want to restore and select “Export”. You can also select where you want it to be stored.

Nemesis decrypter is not available yet

Finally, you should always think about the protection of crypto-ransomwares. In order to protect your computer from Nemesis and other ransomwares, use a reputable anti-spyware, such as Reimage, Malwarebytes MalwarebytesCombo Cleaner or Plumbytes Anti-MalwareMalwarebytes Malwarebytes

About the author

Ugnius Kiguolis
Ugnius Kiguolis - The mastermind

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References

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