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  (95/100)

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

removal by Jake Doevan - - | Type: Ransomware
12

Sad hackers release Sad ransomware

The picture illustrating Sad ransomware note

Sad virus defines crypto-malware which encodes data and demands ransom 0.3 BTC in exchange to the decryption software called decrypter.exe.[1] The latter is available on a specific website accessible via Tor browser. 

During the infiltration, the malware drops the following files[2]:

  • _HELPME_DECRYPT_.txt
  • _HELPME_DECRYPT_.hta
  • _HELPME_DECRYPT_.html

All of them display a slightly different message. The .txt file includes the link to the general information about bitcoins and ways to purchase them.

The .hta file states that the data has been encoded using AES-256 cipher. According to the style of the message, the developer seems to be a non-native English speaker. The file also includes Tor link to the decrtypter.exe – the tool to decode the data affected by Sad ransomware.

Furthermore, the .html file displays less information and urges victims to purchase the decryption software. The malware also leaves picture.exe file in Shared folder.

The malware is already detectable by the majority of security tools as MSIL.Trojan-Ransom.Sad.A, Ransom.Sad, Ransom.CryptXXX, Ransom_SAD.A , etc. The malware seems to disguise under tGVkDTIb.exe file, though executable files may vary.

The malware appends an extension comprised of random hexadecimal characters. There is no information whether Sad Decryptor functions properly. Instead of paying the ransom, concentrate on the elimination of the malware. Reimage or Malwarebytes Anti Malware will help you complete Sad removal.

Ransomware distribution trends

Usually, trojanized ransomware might be foisted as rogue applications in highly dubious websites, such as gaming, gambling, and sites with adult content.

Alternatively, some ransomware developers prefer using exploit kits and hide their malware under fake Adobe Flash Player update[3]. Do not forget that spam emails also remain a popular distribution method.

In order to limit the risk of Sad hijack, pay attention to the programs and source you download from. Be wary of spam emails which are supposedly sent by the official institutions. Installing a couple of different type anti-malware tools might be practical as well. They will help you evade websites infected with exploit kits or phishing sites promoting counterfeited software updates. Let us move on Sad ransomware removal.

Sad elimination steps

Though the malware has quite sufficient GUI and operation mode, it is not known whether it deletes shadow volume copies and causes Sad removal troubles. If the anti-virus program does not respond, restart the system in Safe Mode.

Later on, you should be able to launch the security tool and eliminate the malware. Only after you remove Sad virus completely, proceed to data recovery. There is also an additional method which helps you access the operating system. Not only English users should be wary of the malware, but other users residing in the Czech Republic, Bulgaria[4], or Spain.

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What to do if failed?
If you failed to remove infection using Reimage, submit a question to our support team and provide as much details as possible.
Reimage is recommended to uninstall Sad ransomware virus. 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.
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Manual Sad virus Removal Guide:

Remove Sad 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 Sad

    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 Sad removal.

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

Remove Sad using System Restore

If Safe Mode method is not convenient to you, you may perform System Restore. In order for it to complete successfully, you may need to disable or delete anti-virus tool. After the procedure, reinstall it again. If necessary, change the name of the executable so that the malware would not interfere with its process.

  • 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 Sad. 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 Sad removal is performed successfully.

Bonus: Recover your data

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

What is Data Recovery Pro?

This program was designed to recover damaged data after a system crash. If you do not have backup copies, try this method.

What is “Windows Previous Versions” function?

If System Restore function is enabled, you may benefit from this method as well. Note that you will have to go through each file manually. 

  • 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”.

The benefits of ShadowExplorer

This tool uses shadow volume copies to recreate the copies of the original documents. Sad ransomware does not seem to delete them, likewise, you may stand a chance.

  • 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.

Finally, you should always think about the protection of crypto-ransomwares. In order to protect your computer from Sad and other ransomwares, use a reputable anti-spyware, such as Reimage, Plumbytes Anti-MalwareWebroot SecureAnywhere AntiVirus or Malwarebytes Anti Malware

About the author

Jake Doevan
Jake Doevan - Computer technology expert

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References