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Lukitus ransomware. How to delete? (Removal tutorial)

removal by Jake Doevan - - | Type: Ransomware

Lukitus – the latest variant of Locky ransomware

Fragments of Lukitus ransomware

Lukitus is the newest version of Locky ransomware virus. It started spreading via malicious spam emails that include zip or rar attachments on August 2017. Ransomware aims at 458 different file types and encrypts them using RSA-2048 and AES-128 cryptography. To make them impossible to open and use, it also appends .lukitus file extension to each of them.

Lukitus ransomware also renames targeted files and creates total chaos. The virus uses a specific scheme to change filenames. It includes characters from the unique victim’s ID and random numbers or letters:

[first 8 characters of ID]-[next 4 characters of ID]-[next 4 characters of ID]-[4 characters]-[12 characters].lukitus

This crypto-malware not only takes these files to hostage, but makes their recovery nearly impossible. The virus is capable of deleting Shadow Volume Copies that are crucial for restoring files using third-party software. Therefore, users are offered to obtain the Locky Decryptor.

After the installation, Lukitus downloads two informational files on the computer:

  • ukitus.htm,
  • lukitus.bmp.

The BMP file is a threatening wallpaper that replaces affected computer’s background as soon as data encryption is over The HTM file is a ransom note that urges to visit Locky payment site and buy this shady tool for 0.5 Bitcoins.

Despite the fact this tool might be the only way to restore files, we do not recommend having business with cyber criminals. The success of the Locky should not trick you that hackers always keep their promise and allow victims to use their secret tool. Once they receive your $2000, they might disappear. So, instead of risking your money, focus on Lukitus removal.

In order to remove Lukitus from the PC you will need a strong and professional antivirus or malware removal program. We strongly recommend employing Reimage and cleaning your PC with the help of it.

Operation peculiarities of the ransomware

Once Lukitus gets access to the system, it connects to its Command and Control (C&C) server. In order to do so, it employs a Domain Generation Algorithm (DGA), which allows using numerous different domains. Currently, it’s known that ransomware connects to these addresses, but please do not think about visiting them:

  • http: // kokalgfsnepogq [.] ru / imageload.cgi
  • http: // kljidoejmiqx [.] org / imageload.cgi
  • http: // sorqjivpyfrwlo [.] Click / imageload.cgi
  • http: // jcanepkjyu [.] biz / imageload.cgi
  • http: // dxeqiniexovy [.] org / imageload.cgi

When the connection is established, ransomware downloads malicious files to the system and runs them. Lukitus can inject malicious codes to legitimate system processes, modify Windows Registry and cause other system changes, such as deletes Shadow Volume Copies.

Of course, the most important task is data encryption, which is completed as soon as the virus strengthens its presence. Due to these system changes, you have to get rid of Lukitus immediately. Otherwise, your computer becomes vulnerable.

Malspam spreads Lukitus ransomware in ZIP and RAR archives

Malicious emails that include Lukitus payload are spreading with the help of Necurs Botnet and the BlankSlate malware. Researchers spotted more than 1000 different emails that include infected ZIP or RAR archives. The majority of infections were carried from July-August2017.rar file.

The malicious archive is attached to an ordinary email that asks to check the documents. However, this attachment include JS file that executed malware on the PC as soon as a user opens it. Of course, this file is obfuscated and looks like MS Word or Excel file, PDF, or other safely looking file.

Currently, researchers spotted few active email campaigns that use these subject lines:

  • Emailing [random letters and numbers]
  • < No Subject >

Therefore if you receive an email with such subject line, you should not open it; especially, you should not open attached documents or click on provided links. If you have opened an unknown email that urges to check the attachment, you have to make sure that it’s actually safe to do it.

Handbook of Lukitus removal

You must remove Lukitus using antivirus or malware removal program. It’s a complicated and dangerous cyber infection that requires proper treatment. In order to avoid damaging the system, you have to run a full system scan with security software. It’s the only way to stop hazardous processes and delete malware-related entries from the PC.

We recommended performing this process using Reimage or Malwarebytes. However, if you cannot install your preferred antivirus, you may need to reboot the computer to Safe Mode with Networking and then run the system scan. Detailed Lukitus removal instructions are below.

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To remove Lukitus virus, follow these steps:

Eliminate Lukitus using Safe Mode with Networking

Follow these steps to disable the Lukitus virus and install/run antivirus or malware removala program:

  • Step 1: Restart your computer in Safe Mode with Networking

    Windows 7 / Vista / XP
    1. Go to Start Shutdown Restart OK.
    2. As soon as your computer starts, start pressing F8 key repeatedly before the Windows logo shows up.
    3. Choose Safe Mode with Networking from the list Choose 'Safe Mode with Networking' option

    Windows 10 / Windows 8
    1. Click on the Power button at the Windows login screen, and then press and hold Shift key on your keyboard. Then click Restart.
    2. Then select Troubleshoot Advanced options Startup Settings and click Restart.
    3. Once your computer starts, select Enable Safe Mode with Networking from the list of options in Startup Settings. Choose 'Enable Safe Mode with Networking' option
  • Step 2: Remove Lukitus

    Sign in to your account and launch any Internet browser. Download a legitimate anti-malware software, for instance, Reimage. Make sure you update it to the latest version and then run a full system scan with it to detect and eliminate all malicious components of the ransomware to remove Lukitus completely.

If your ransomware does not allow you to access Safe Mode with Networking, please follow the instructions provided below.

Eliminate Lukitus using System Restore

  • Step 1: Restart your computer in Safe Mode with Command Prompt

    Windows 7 / Vista / XP
    1. Go to Start Shutdown Restart OK.
    2. As soon as your computer starts, start pressing F8 key repeatedly before the Windows logo shows up.
    3. Choose Command Prompt from the list Choose 'Safe Mode with Command Prompt' option

    Windows 10 / Windows 8
    1. Click on the Power button at the Windows login screen, and then press and hold Shift key on your keyboard. Then click Restart.
    2. Then select Troubleshoot Advanced options Startup Settings and click Restart.
    3. Once your computer starts, select Enable Safe Mode with Command Prompt from the list of options in Startup Settings. Choose 'Enable Safe Mode with Command Prompt' option
  • Step 2: Perform a system restore to recover files and settings
    1. When the Command Prompt window appears, type in cd restore and press Enter. Type 'cd restore' without quotes and hit 'Enter'
    2. Then type rstrui.exe and hit Enter.. Type 'rstrui.exe' without quotes and hit 'Enter'
    3. In a new window that shows up, click the Next button and choose a restore point that was created before the infiltration of Lukitus and then click on the Next button again. When 'System Restore' wizard comes up, click 'Next'. Choose a preferable restore point and click 'Next'
    4. To start system restore, click Yes. Hit 'Yes' and start system restore
    After restoring the computer system to an antecedent date, install and check your computer with Reimage to uncover any remains of Lukitus.

Bonus: Restore your files

Using the tutorial provided above you should be able to eliminate Lukitus from the infected device. novirus.uk team has also prepared an in-depth data recovery guide which you will also find above.

There are a couple of methods you can apply to recover data encrypted by Lukitus:

Data Recovery Pro helps to recover damaged files

Data Recovery Pro might help to restore some of the encrypted files.

  • Download Data Recovery Pro;
  • Install Data Recovery on your computer following the steps indicated in the software’s Setup;
  • Run the program to scan your device for the data encrypted by Lukitus ransomware;
  • Recover the data.

Take advantage Windows Previous Versions feature

This method can help to get back individual files after Lukitus attack:

  • Right-click on the encrypted document you want to recover;
  • Click “Properties” and navigate to “Previous versions” tab;
  • In the “Folder versions” section look for the available file copies. Choose the desired version and press “Restore”.

ShadowExplorer might help if Lukitus failed to delete Shadow Volume Copies

Sometimes ransomware fails to delete Shadow Volume Copies. If this happens, ShadowExplorer might help you in data recovery:

  • Download Shadow Explorer (http://shadowexplorer.com/);
  • Install Shadow Explorer on your computer following the instructions in the software’s Setup Wizard;
  • Run the program. Navigate to the menu on the top-left corner and select a disk containing your encrypted files. Look through the available folders;
  • When you find the folder you want to recover, right-click it and select “Export”. Also, choose where the recovered data will be stored.

Lukitus decryptor hasn't been released yet.

About the author

Jake Doevan - Do not waste your precious time dealing with computer virus infections alone

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Source: https://www.2-spyware.com/remove-lukitus-ransomware-virus.html

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