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Sequre ransomware. How to remove? (Uninstall guide)

removal by Alice Woods - - | Type: Ransomware

Sequre ransomware is a threat which uses new techniques to bypass security

Sequre ransomware

Sequre ransomware is a file encrypting virus[1] that was first noticed by security experts in April 2018. The malware encrypts all data using AES encryption algorithm. It changes the filename by using email address sequre@tuta.io_ and hex-translated file name. Then, hackers demand payment of 0.14 BTC for data decryption key.

SUMMARY
Name Sequre ransomware
Type File-encrypting virus
Cipher AES
File appendix sequre@tuta.io_ [hex]
Ransom size 0.14 BTC
Distribution Spam emails, malicious sites, fake updates, cracked software, Peer-to-Peer sites, etc.
Elimination To get rid of Sequre ransomware download professional security software – Reimage, Malwarebytes, Plumbytes Anti-MalwareNorton Internet Security

As soon as the virus enters users’ machines, it strengthens its presence by modifying system settings. Sequre ransomware is unique in the regard of how it performs its function. Instead of executable file completing all the procedures, the ransomware consists of several executables encrypted by C# program which then launches directly into memory.

Sequre virus can encrypt a variety of files, including the most popular formats, like .doc, .html, .jpg, .mp3, .mpeg and similar. Thus, the file called picture.jpg would be turned into sequre@tuta.io_7654321757A6540747574612E696F5K123123L5679037303637 and become completely unusable.

To decrypt files, users need to obtain a unique key that is stored on a remote server by cybercriminals. For that, hackers demand payment of 0.14 Bitcoins (approx. $1300 at the current exchange rate). Do not pay the ransom! Instead, remove Sequre ransomware and recover your files using alternative methods.

Victims find out about all the conditions in a ransom note, which is called  HOW DECRIPT FILES.hta. This file is placed into every infected folder, and the starts with the following text:

Your files are encrypted!Your personal identifier NQFWTAPP72VXJI2TKUFGN2107016WN0KDU9UYCUI A serious vulnerability in your network security has been detected. Data is not stolen and no one can do it while they are encrypted. For you, we have an automatic decryptor and instructions for correcting it.
<…>

The crooks then proceed explaining how to obtain Bitcoin cryptocurrency and how to proceed with the payment. As soon ransom is paid, victims are urged to send a screenshot of it and the personal ID to the sequre@tuta.io. Sequre authors also offer to transfer a file (up to 10MB) to make sure that decrypt actually works. Finally, they threaten that Sequre ransomware removal will result in permanent data loss.

We advise users to ignore hackers’ demands as these people cannot be trusted. Ransomware authors are known to ignore victims, even after the requirements are met. So, you risk losing not only your personal files but also a large sum of money.

Thus, you can recover your files from a backup or by using alternative methods we provide below. Before you proceed with that, you have to get rid of a Sequre virus using robust security software, such as Reimage, Malwarebytes or Plumbytes Anti-MalwareNorton Internet Security.

The way ransomware infects users’ machines

Security experts[2] segregate the following malware infection methods:

  • Contaminated spam email attachments or malicious links;
  • Repacked or cracked software;
  • Key generators;
  • Unprotected RDP configuration[3];
  • Hacked websites;
  • Exploit kits and few others.

To protect yourself from harmful viruses, never open suspicious attachments (especially if they ask you to enable a macro function to open) inside emails or click on links. Additionally, avoid visiting websites of dubious content, do not click on ads and keep your OS and software up to date at all times. Finally, download and install security software with real-time protection feature.

Delete Sequre ransomware and attempt file recovery

As we already mentioned, the best course of actions would be Sequre removal and then an attempt to recover your files. Do not try to remove Sequre virus manually as it is almost impossible.

Instead, download and install anti-malware software. We recommend Reimage, Malwarebytes or Plumbytes Anti-MalwareNorton Internet Security as these malware removal tools are designed to deal with even the most stubborn viruses. Don’t forget that ransomware typically has removal protection and will not let security software t startup properly. In this case, restart your PC and boot in Safe Mode with Networking.

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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.
More information about this program can be found in Reimage review.

If you decided to select another anti-spyware, uninstall Reimage from your computer.
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Alternate Software
Malwarebytes
Alternate Software
Malwarebytes

To remove Sequre virus, follow these steps:

Remove Sequre using Safe Mode with Networking

To ensure proper security software operation, enter Safe Mode with Networking using these steps:

  • 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 Sequre

    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 Sequre removal.

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

Remove Sequre using System Restore

Try to eliminate Sequre virus by using System Restore:

  • 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 Sequre. 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 Sequre removal is performed successfully.

Bonus: Recover your data

Guide which is presented above is supposed to help you remove Sequre 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 Sequre, you can use several methods to restore them:

Try Data Recovery Pro

Data Recovery Pro is professional software that is created to return files that were damaged ir accidentally deleted. However, it is also known to be work for ransomware encrypted 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 Sequre ransomware;
  • Restore them.

Use Windows Previous Versions feature

This method will only work if your had System Restore enabled before the virus attack occurred. Also, this feature only allows recover files one-by-one. Thus, large amount of data is hard to recover.

  • Find an encrypted file you need to restore and right-click on it;
  • Select “Properties” and go to “Previous versions” tab;
  • Here, check each of available copies of the file in “Folder versions”. You should select the version you want to recover and click “Restore”.

ShadowExplorer might be useful

ShadowExplorer is a tool that recreates files from Shadow Volume Copies from Windows OS. Unfortunately, ransomware viruses typically delete these files.

  • 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.

Decryptor is not available yet

About the author

Alice Woods
Alice Woods - Likes to teach users about virus prevention

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References