How to remove Spora ransomware and decrypt files?

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About Spora ransomware

Spora is a ransomware program or a virus, it behaves like a typical cryptor infection. Nowadays ransomware is the most dangerous type of malicious software and Spora is one of the most popular samples on the internet.

As the other, this ransomware spreads by using email messaging. Most of these email are going to spam folder, but some may slip to your regular inbox. Though most users know this, we want to remind you that you should not open any spam email unless from trusted and checked sources! As for the Spora virus, all email with it inside has the attachment in form of HTA file. Once users executes this file, it will extract a closed.js javascript file in your %temp% folder (C:\Users\%username%\AppData\Local\Temp). This script will execute the encryptor that will encrypt your files with RSA algorithm. Note that Spora ransomware doesn`t rename the encrypted files like other ransomware viruses. After the encryption, it creates .html and .KEY files placing the in all folders that contain encrypted files.

remove Spora ransomware
Spora

The main difference of Spora ransomware is that this virus works offline, it doesn`t require the internet connection to start encryption process, generate public and private keys. To decrypt files the private key is required. But along with the files, developers are encrypting the private key with AES algorithm, making the recovery process more complicated. Even more, Spora ransomware also removes shadow volume copies of your OS, disable Windows Startup Repair and changes Boot settings.

The HTML file is a webpage with a demand message. On this page, you will see your unique ID that will allow you to enter your “Personal Area“.

Spora ransomware

To get logged in, you will need the internet connection, though. Once you do that, the HTML file will redirect you to a website with your Personal area. This is the main page where you will see everything from the amount of money you need to pay to a Public Communication chat.

Spora ransomware

The interesting observation about Spore, is that this ransomware virus demands a lot less money then Locky or Cerber. The demanded ransom-fee approximately equivalent to between 80$ and $300. There are also other payable functions that victim can choose, like Immunity, Removal, File Restore. Also, Spora allows victim to restore 2 encrypted files for free. The demanded ransom should be paid only in Bitcoins. At a time of writing this article, there are now decryption tools available.

Unlike lots of other ransomware infections, Spora ransomware only infecting a small range of file extension to encrypt. Here is the full list:

.xls, .doc, .xlsx, .docx, .rtf, .odt, .pdf, .psd, .dwg, .cdr, .cd, .mdb, .1cd, .dbf, .sqlite, .accdb, .jpg, .jpeg, .tiff, .zip, .rar, .7z, .backup

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STEP 1. Recover files from Spora ransomware encryption

There are a lot of different ransomware viruses on the internet. Some of them are more dangerous than the others because they not only leaving malicious processes to protect themselves, but also removing backups of your system to make the recovery process impossible.

Please Note: Not all ransomware infections are able to remove backups of your system, so it is always worth to try a windows recovery method below. In order to protect your backups from this danger, try our Anti-Ransomware product:

We recommend use Safe Mode with command prompt to safely perform a recovery of your files. You will have to reboot your computer, so you better save this instruction some where on your hard drive or read if from second computer.

  • Windows 7 users: You need to reboot your system and before its loaded constantly press “F8” button until you see boot options.

    Spora ransomware remove
  • Windows 8/10 users: Press the “Power” button from Windows login screen or Settings. Hold the Shift key on your keyboard and click on “Restart
    Spora ransomware remove
  • After your computer reboots – Click on “Troubleshoot” – press “Advanced options” – “Startup Settings
    Spora ransomware remove
  • Click the “Restart” button and your computer will reload again and show you the list with all options. You need to choose the “Safe Mode with Command Prompt
    Spora ransomware remove
  • When your windows loads, enter the following line: cd restore and press Enter.
    Spora ransomware remove
  • After that type rstrui.exe line and press Enter.
    Spora ransomware remove
  • A recovery window will open before you, Click Next to proceed.
    Spora ransomware remove
  • In the next window, you need to choose a Restore point. All files in protected drives will be recovered at the time when this point was created (prior to the infection with Spora). In the case when ransomware removes these backups, there will be no Restore points listed. Select a Restore point and click “Next”.
    Spora ransomware remove
  • Click “Finish” in this window and confirm the recovery process by pressing “Yes“.
    Spora ransomware remove

Simple example of how to recover your files from ransomware infection:

STEP 2. Removing Spora ransomware malicious files

Once the recovery process is complete, you should consider scanning your computer with a GridinSoft Anti-Malware in order to find any traces of Spora infection. Though some ransomware viruses are removing themselves right after the encryption of your files, some may leave malicious processes on your computer for special purposes of cyber criminals.

  1. Run GridinSoft Anti-Malware and choose the scan type, which is suitable for your needs. Of course, for the accuratest scan results we recommend you to choose the “Full Scan”.
  2. Choose "Full Scan"
    GridinSoft Anti-Malware Scan Types

  3. Give Anti-Malware a little time to check your system:
  4. Please wait until the scan completed
    Anti-Malware Scan Process

  5. Move to quarantine all the viruses and unwanted files, that you see in the results list:
  6. Move detected items to quarantine
    GridinSoft Anti-Malware Scan Results

  7. Enjoy the malware removal process:
  8. GridinSoft Anti-Malware Removal Process
    Removal process completed. Your system is clean!

Use of On-run protection may additionaly prevent different types of cyber attacks, our protect may flag the downloader of the ransomware as a malicious application preventing the download of Spora.

GridinSoft Anti-Malware Spora protection

STEP 3. Prevent the Spora ransomware infection with GridinSoft Anti-Ransomware

Despite that some ransomware can remove backups of your OS, our product GridinSoft Anti-Ransomware is able to protect them from the removing in the first place. When some kind of a malicious program or ransomware virus tries to delete your backups, out program intercepts this request and blocks the sending process.
Note: that the product is still in Beta testing phase, some bugs and glitches are possible.
Besides the protection tool, you should read and learn few simple rules. Follow them every time you work on your computer and your will decrease chances of your infection to a minimum:

  • Don’t open suspicious spam letters. No way! Be very careful with your downloads. Download and install software preferably from its official website.
  • Do backups of your important files regularly. Storing your really important files in few different places is a good decision.
  • Keep your system free from adware, hijackers and PUPs The infected computer will be more likely compromised with other malicious software, and ransomware is not an exception in this case.
  • Don’t panic and be reasonable. Don’t pay the ransom fee right after you got infected, it is always best to search on the internet for some answers. It is possible that someone have developed a decryption tool that might help you.
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One thought on “How to remove Spora ransomware and decrypt files?

  1. fiz o procedimento do passo 1 e recebi a mensagem: o ‘rstrui.exe’ não é reconhecido como um comando interno

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