Severity scale:  
  (90/100)

Trojan.Encoder.6491. How to remove? (Uninstall guide)

removal by Olivia Morelli - - | Type: Ransomware

Trojan.Encoder.6491 is the first ransomware variant written in Google’s Go programming language

Trojan.Encoder.6491 virus is a newly released ransomware that has been defeated just after three days since its first emergence. This unsuccessful ransomware example is coded using Go language, and reportedly is distributed in the form of Windows_Security.exe file. If you follow computer security news, you probably know that ransomware authors love to use a new technique to encrypt victim’s files quickly and silently – they launch a fake screen that looks like Windows Update screen, and in the meantime, corrupts all files on the system. Trojan.Encoder.6491 ransomware uses the same technique and locks the files with advanced encryption standard (AES cipher). The virus encrypts files by file extensions they have, and it targets more than 140 different file types. Once it finds target file, encrypts it and appends a .enc file extension to it. Please do not confuse this virus with TrueCrypter or Crypt0L0cker viruses, which also attach the same extension to encrypted files. However, Trojan.Encoder.6491 malware does not only append new file extension but also distorts the filename by applying the Base64 algorithm. This modification does not allow the victim to identify corrupted files.

After applying all changes to victim’s files, the virus displays a ransom note, which contains all information about the data encryption and decryption processes. The victim is asked to pay around 25 USD in Bitcoins, which is 0.052300 BTC. There is also an e-mail provided at the end of the note for those who have any questions – helpmedecrypt@protonmail.com. However, if your files have been encrypted by Trojan.Encoder.6491 ransomware virus, do not waste your money and better use it for a better purpose, for example, protection of your computer system. We have some good news for you – this virus has some flaws that allows victims to decrypt .enc files. The decryption tool has not been released publicly yet, but soon it is going to be available to everyone. However, you should try to decrypt data only after removing the virus. To remove Trojan.Encoder.6491 malware, use Reimage software or the one you already have. Make sure you update it first to ensure a successful Trojan.Encoder.6491 removal!

Trojan.Encoder.6491 virus leaves such message for the victim

How does this ransomware infect computers?

Questions about Trojan.Encoder.6491

You can infect your computer with this ransomware by opening random email letters and files attached to them. Sending tons of malicious email attachments to victims is the primary ransomware distribution method, so before opening an email that is sent by an unknown sender, think twice. We bet that you do not want to compromise the computer system by accident, so stay away from Spam and Junk sections in your email, but keep in mind that some malicious letters can bypass these email filters and go straight to the Inbox.

Ransomware can infect unprotected computers as soon as the victim clicks on a malevolent ads or visits an infectious website that contains an exploit kit. Avoid such dangers by installing a trustworthy anti-malware software.

Remove Trojan.Encoder.6491 virus and decrypt .enc files

Please use Trojan.Encoder.6491 removal instructions provided below to prepare your PC before you run an anti-malware software. This way, the virus will be deactivated, and anti-virus software will be able to do its job. To remove Trojan.Encoder.6491, use one of the programs we recommend, but please, do not try to uninstall this virus manually. You can leave some malicious files on the system and make it vulnerable to further malware attacks!

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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 Trojan.Encoder.6491, follow these steps:

Remove Trojan.Encoder.6491 using Safe Mode with Networking

  • 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 Trojan.Encoder.6491

    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 Trojan.Encoder.6491 removal.

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

Remove Trojan.Encoder.6491 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 Trojan.Encoder.6491. 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 Trojan.Encoder.6491 removal is performed successfully.

Bonus: Recover your data

Guide which is presented above is supposed to help you remove Trojan.Encoder.6491 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 Trojan.Encoder.6491, you can use several methods to restore them:

Data Recovery Pro to fix your files

If you want, you can try this data recovery method to restore files encrypted by Trojan.Encoder.6491 ransomware:

  • 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 Trojan.Encoder.6491 ransomware;
  • Restore them.

Trojan.Encoder.6491 decryption tool

At the moment, Trojan.Encoder.6491 decryption tool is available only for people who purchase a certain computer protection software – the anti-virus company does not allow victims to use this tool for users of other anti-virus programs. However, considering that this ransomware is full of flaws, other malware researchers should release free decryption tools shortly. Be patient! We will update the article as soon as such tools appear.

Finally, you should always think about the protection of crypto-ransomwares. In order to protect your computer from Trojan.Encoder.6491 and other ransomwares, use a reputable anti-spyware, such as Reimage, Malwarebytes MalwarebytesCombo Cleaner or Plumbytes Anti-MalwareMalwarebytes Malwarebytes

About the author

Olivia Morelli
Olivia Morelli - Ransomware analyst

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