Shadow ransomware. How to remove? (Uninstall guide)
Shadow ransomware is a crypto virus that uses .shadow extension and is related to BTCWare malware
Shadow ransomware is a crypto virus that might result in a total wipeout of the personal files
Questions about Shadow ransomware
Shadow ransomware is a set of viruses that belong to BTCWare ransomware family. It encrypts data with the help of AES-256 encryption algorithm and adds .shadow file extension. Additionally, victims' IP and the contact email address of the hackers is embedded into appending, so the full extension looks like this: .[email]-id-[ID].shadow (for example picture.jpg.paydayz@cock.li-id-1420.shadow). After the encryption procedure is complete, Shadow ransomware opens a pop-up window called payday.hta or !! RETURN FILES !!.txt, explaining to victims what to do next. Typically, users are asked to pay ransom in Bitcoins for file release. Several email addresses are tied to the .shadow extension. However, in late December 2018, victims' machines started to be infiltrated by a STOP ransomware variant that also uses .shadow file extension.
| Summary | |
| Name | Shadow ransomware |
| A variant of | BTCWare ransomware |
| Extension | .shadow |
| Cipher used | AES-256 |
| Decryptable? | No |
| Infection methods | RDP, spam emails, exploits, fake updates, insecure sites, etc. |
| Elimination | Use security software like Reimage to uninstall malicious components |
Shadow BTCWare ransomware uses a strong encryption algorithm to corrupt files on the affected machine. Crypto-malware continues spreading by taking advantage of unprotected remote desktop servers.
Once inside, the malicious program makes changes to the system. It might create or modify Windows Registry in order to boot on system startup, disable security software and make other needed changes. Then Shadow virus starts data encryption procedure.
When files are successfully locked by .shadow file extension virus, malware shows the same ransom note. The only difference here is – new contact email. Now victims have to contact crooks via paydayz@cock.li email address. Additionally, they can send test files for free decryption in order to make sure that thieves are not lying about decryption software:
Free decryption as guarantee
Before paying you can send us up to 3 files for free decryption. The total size of files must be less than 1Mb (non archived), and files should not contain valuable information. (databases,backups, large excel sheets, etc.)
Select 'Safe Mode with Networking'
Select 'Enable Safe Mode with Networking'
Select 'Safe Mode with Command Prompt'
Select 'Enable Safe Mode with Command Prompt'
Enter 'cd restore' without quotes and press 'Enter'
Enter 'rstrui.exe' without quotes and press 'Enter'
When 'System Restore' window shows up, select 'Next'
Select your restore point and click 'Next'
Click 'Yes' and start system restore
However, free decryption possibility might be just a trickery used for convincing you into paying the ransom. Once you make the transaction, crooks might disappear because the main purpose of Shadow ransowmare is the same as any other file-encrypting virus’ – to obtain Bitcoins illegally.
After ransomware attack, you should focus on Shadow ransowmare removal instead of trying to get back your files by paying the ransom. Nevertheless, virus elimination won’t recover your files; you have to clean the system from malicious components. Additionally, you will be able to use backups or try alternative recovery methods to retrieve corrupted data.
In order to remove Shadow ransomware entirely, you have to run a full system scan with professional malware removal[1] program. We suggest using Reimage because this tool is capable of detecting all latest cyber threats and eliminating them properly.
Shadow ransomware is a variant of BTCWare virus, although recently, security experts noticed a STOP ransomware variant that uses .shadow file extension
Poor remote desktop services allows ransomware to enter into the system
This crypto-virus is designed to attack devices via poor or unprotected remote desktop services. Thus, it’s important to create strong passwords and limit admin access to avoid ransomware attack.
However, the cyber security team from Les Virus[2] note that previous versions of BTCWare were spreading via malicious spam email emails and Trojans too. Therefore, you should be careful when:
- opening email attachments;
- downloading freeware or shareware;
- installing software updates;
- clicking on ads.
In order to avoid ransomware attack, you have to click or download needed content only if you are absolutely sure that it’s a legitimate and safe entry. Thus, stay away from suspicious spam emails,[3] unknown file-sharing websites, and pop-ups that warn about detected cyber threats.
Shadow BTCWare removal instructions
Computer users, who have suffered from ransomware attack, are advised to rely on professional security software in order to wipe out malware from the system. Automatic Shadow removal ensures that all malicious components are removed from the system entirely. Meanwhile, this task is nearly impossible to perform manually.
However, if you cannot install or start security software, you should check the guide below and follow it carefully. The instructions will show you how to deal with the obstacles and remove Shadow ransomware virus with Reimage, Plumbytes Anti-MalwareMalwarebytes Malwarebytes or your chosen anti-malware software.
To remove Shadow virus, follow these steps:
Remove Shadow using Safe Mode with Networking
If you cannot install or run security software, reboot to the Safe Mode with Networking as shown below:
-
Step 1: Reboot your computer to Safe Mode with Networking
Windows 7 / Vista / XP- Click Start → Shutdown → Restart → OK.
- When your computer becomes active, start pressing F8 multiple times until you see the Advanced Boot Options window.
-
Select Safe Mode with Networking from the list
Windows 10 / Windows 8- Press the Power button at the Windows login screen. Now press and hold Shift, which is on your keyboard, and click Restart..
- Now select Troubleshoot → Advanced options → Startup Settings and finally press Restart.
-
Once your computer becomes active, select Enable Safe Mode with Networking in Startup Settings window.
-
Step 2: Remove Shadow
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 Shadow removal.
If your ransomware is blocking Safe Mode with Networking, try further method.
Remove Shadow using System Restore
This method might also help to disable the virus and run automatic Shadow ransomware removal:
-
Step 1: Reboot your computer to Safe Mode with Command Prompt
Windows 7 / Vista / XP- Click Start → Shutdown → Restart → OK.
- When your computer becomes active, start pressing F8 multiple times until you see the Advanced Boot Options window.
-
Select Command Prompt from the list
Windows 10 / Windows 8- Press the Power button at the Windows login screen. Now press and hold Shift, which is on your keyboard, and click Restart..
- Now select Troubleshoot → Advanced options → Startup Settings and finally press Restart.
-
Once your computer becomes active, select Enable Safe Mode with Command Prompt in Startup Settings window.
-
Step 2: Restore your system files and settings
-
Once the Command Prompt window shows up, enter cd restore and click Enter.
-
Now type rstrui.exe and press Enter again..
-
When a new window shows up, click Next and select your restore point that is prior the infiltration of Shadow. After doing that, click Next.
-
Now click Yes to start system restore.
-
Once the Command Prompt window shows up, enter cd restore and click Enter.
Bonus: Recover your data
Guide which is presented above is supposed to help you remove Shadow from your computer. To recover your encrypted files, we recommend using a detailed guide prepared by 2-spyware.com security experts.While the official decryptor is not released yet, you can try these methods to restore at least some of your files.
If your files are encrypted by Shadow, you can use several methods to restore them:
Data Recovery Pro to restore files with .shadow extension
This software is created for recovering corrupted data. Thus, it might also help after ransomware attack.
- 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 Shadow ransomware;
- Restore them.
Take advantage of Windows Previous Versions feature
If System Restore was enabled before ransomware attack, you can restore individual files by following these steps:
- 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 help too
If ransomware did not delete Shadow Volume Copies, you might be able to restore some of the files using ShadowExplorer:
- 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.
Shadow BTCWare decryptor is not available yet.
Finally, you should always think about the protection of crypto-ransomwares. In order to protect your computer from Shadow and other ransomwares, use a reputable anti-spyware, such as Reimage, Malwarebytes MalwarebytesCombo Cleaner or Plumbytes Anti-MalwareMalwarebytes Malwarebytes
About the author
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References
- ^ Margaret Rouse. Antimalware (anti-malware). TechTarget. Network of technology-specific websites.
- ^ Les Virus. Les Virus. Cyber security news.
- ^ Doug Olenick. Email malware, phishing and spam attempts hit new highs for 2017. SC Magazine. Breaking news on cybersecurity, cybercrime, industry insight and security product reviews.