Raldug Ransomware

Also Known As: Raldug virus
Distribution: Moderate
Damage level: Severe

Raldug ransomware removal instructions

What is Raldug?

Raldug is another variant of a high-risk ransomware called Djvu. As with its predecessor, Raldug encrypts stored data, thereby making it unusable. Additionally, Raldug appends filenames with ".raldug" extension (e.g., "sample.jpg" is renamed to "sample.jpg.raldug"). Raldug is also designed to drop a "_readme.txt" text file in every existing folder.

The purpose of most ransomware infections is to blackmail victims and Raldug is no exception. Its text file states that data is encrypted and recovery requires a unique decryption tool/key which victims must purchase. Unfortunately, this is true. It is currently unconfirmed whether Raldug uses symmetric or asymmetric cryptography. Nevertheless, it is sure that each victim gets a unique decryption key. The problem is that all keys are stored in a remote server controlled by Raldug developers. In order to receive one's key, each victim has to pay a ransom of $980. It is, however, noted that victims who will contact these persons within 72 hours after the encryption will receive a 50% discount, meaning that the price will drop to $490. However, be aware that these persons cannot be trusted. Ransomware developers are notorious for ignoring victims, once payments are submitted. This means that payment usually gives no positive result. We highly recommend to ignore all encouragements to submit payments and even contact these persons. Raldug is an undecryptable ransomware - there are no tools capable of cracking its encryption and restoring files for free. The only possible solution is to restore everything from a backup.

Screenshot of a message encouraging users to pay a ransom to decrypt their compromised data:

Raldug decrypt instructions

Raldug has very similar characteristics to dozens of other ransomware-type infections, such as Carcn, Btix, _Crypted. As with Raldug, most of these infections compromise data (typically, by encrypting) and make ransom demands. It is unfortunate that most of ransomware employ cryptographies that generate unique decryption keys. Thus, unless the virus isn't fully developed and/or has certain bugs/flaws, restoring data manually (without developers interfering) is impossible. We highly recommend to maintain regular data backups. Yet be sure to store them in a remote server or either unplugged storage devices - locally stored backups will be encrypted alongside with the regular data.

How did ransomware infect my computer?

Cyber criminals typically proliferate ransomware by using unofficial software download sources, email spam campaigns, trojans, and fake software updaters/cracks. Free file hosting websites, freeware download websites, peer-to-peer (P2P) networks (eMule, torrents, etc.) and other unofficial software download sources are used to present malicious executables as legitimate software. This way users get tricked into downloading and installing malware manually. Spam campaigns are used to send hundreds of thousands of emails containing malicious attachments and deceptive messages encouraging users to open. Attachments are often presented as invoices, bills, receipts, and other "important documents" to create the impression of legitimacy. However, opening result is exactly the same - malware infection. Trojans are malicious applications that stealthily infiltrate computers and continually inject additional malware. Fake updaters infect computers by either exploiting outdated software's bugs/flaws or simply downloading and installing malware instead of the actual updates. Cracks work basically the same - their purpose is to activate paid software or free. However, since crooks use them to spread malware, users are way more likely to infect their computers, rather than gaining access to paid features. In summary, the main reasons for computer infections are poor knowledge and reckless behavior.

Threat Summary:
Name Raldug virus
Threat Type Ransomware, Crypto Virus, Files locker
Encrypted Files Extension .raldug
Ransom Demanding Message _readme.txt text file
Ransom Amount $980/$490
Cyber Criminal Contact merosa@india.com, merosa@firemail.cc
Symptoms Can't open files stored on your computer, previously functional files now have a different extension, for example my.docx.locked. A ransom demanding message is displayed on your desktop. Cyber criminals are asking to pay a ransom (usually in bitcoins) to unlock your files.
Additional Information Displays fake windows update pop-up, modifies Windows hosts file to prevent users from accessing cyber security websites.
Distribution methods Infected email attachments (macros), torrent websites, malicious ads.
Damage All files are encrypted and cannot be opened without paying a ransom. Additional password stealing trojans and malware infections can be installed together with a ransomware infection, injects AZORult trojan into the system.

To eliminate Raldug virus our malware researchers recommend scanning your computer with Spyhunter.
▼ Download Spyhunter
Free scanner checks if your computer is infected. To remove malware, you have to purchase the full version of Spyhunter.

How to protect yourself from ransomware infections?

Email attachments that are irrelevant and those received from suspicious/unrecognizable email addresses should never be opened. Be sure to download apps only from official sources, using direct download links. Third party downloaders/installers often include rogue apps, which is why such tools should never be used. Be sure to keep installed applications up-to-date. To achieve this, however, use only implemented functions or tools provided by the official developer. Software piracy is considered a cyber crime. Moreover, the risk of infections is extremely high. For this reason, you should never attempt to crack installed applications. Lastly, be sure to always have a reputable anti-virus/anti-spyware suite installed and running. It will help you to detect and eliminate malware before the system is harmed. The key to computer safety is caution. If your computer is already infected with Raldug, we recommend running a scan with Spyhunter for Windows to automatically eliminate this ransomware.

Text presented in Raldug ransomware's text file ("_readme.txt"):


Don't worry my friend, you can return all your files!
All your files like photos, databases, documents and other important are encrypted
with strongest encryption and unique key.
The only method of recovering files is to purchase decrypt tool and unique key for you.
This software will decrypt all your encrypted files.
What guarantees you have?
You can send one of your encrypted file from your PC and we decrypt it for free.
But we can decrypt only 1 file for free. File must not contain valuable information.
You can get and look video overview decrypt tool:
Price of private key and decrypt software is $980.
Discount 50% available if you contact us first 72 hours, that's price for you is $490.
Please note that you'll never restore your data without payment.
Check your e-mail "Spam" folder if you don't get answer more than 6 hours.

To get this software you need write on our e-mail:

Reserve e-mail address to contact us:

Your personal ID:


Screenshot of files encrypted by Raldug (".raldug" extension):

Files encrypted by Raldug

As with most of ransomware from Djvu family, Raldug also displays a fake Windows update pop-up during the encryption:

Djvu ransomware family fake update

IMPORTANT NOTE! - Aside from encrypting data, ransomware-type infections from Djvu malware family also installs a trojan-type virus called AZORult, which is designed to steal various account credentials. Moreover, this malware family is designed to add a number of entries to the Windows hosts file. The entries contain URLs of various websites, most of which are related to malware removal. This is carried out with the intention of making users unable to access malware security websites and seek help. Our website (PCrisk.com) is also on the list. Removing these entries, however, is simple - you can find detailed instructions in this article (note that, although the steps are shown in the Windows 10 environment, the process is virtually identical on all versions of the Microsoft Windows operating system).

Screenshot of websites added to Windows hosts file:

Tro Ransomware adding websites to Windows Hosts file

Raldug ransomware removal:

Instant automatic removal of Raldug virus: Manual threat removal might be a lengthy and complicated process that requires advanced computer skills. Spyhunter is a professional automatic malware removal tool that is recommended to get rid of Raldug virus. Download it by clicking the button below:
▼ DOWNLOAD Spyhunter By downloading any software listed on this website you agree to our Privacy Policy and Terms of Use. Free scanner checks if your computer is infected. To remove malware, you have to purchase the full version of Spyhunter.

Quick menu:

Step 1

Windows XP and Windows 7 users: Start your computer in Safe Mode. Click Start, click Shut Down, click Restart, click OK. During your computer start process, press the F8 key on your keyboard multiple times until you see the Windows Advanced Option menu, and then select Safe Mode with Networking from the list.

Safe Mode with Networking

Video showing how to start Windows 7 in "Safe Mode with Networking":

Windows 8 users: Start Windows 8 is Safe Mode with Networking - Go to Windows 8 Start Screen, type Advanced, in the search results select Settings. Click Advanced startup options, in the opened "General PC Settings" window, select Advanced startup. Click the "Restart now" button. Your computer will now restart into the "Advanced Startup options menu". Click the "Troubleshoot" button, and then click the "Advanced options" button. In the advanced option screen, click "Startup settings". Click the "Restart" button. Your PC will restart into the Startup Settings screen. Press F5 to boot in Safe Mode with Networking.

Windows 8 Safe Mode with networking

Video showing how to start Windows 8 in "Safe Mode with Networking":

Windows 10 users: Click the Windows logo and select the Power icon. In the opened menu click "Restart" while holding "Shift" button on your keyboard. In the "choose an option" window click on the "Troubleshoot", next select "Advanced options". In the advanced options menu select "Startup Settings" and click on the "Restart" button. In the following window you should click the "F5" button on your keyboard. This will restart your operating system in safe mode with networking.

windows 10 safe mode with networking

Video showing how to start Windows 10 in "Safe Mode with Networking":

Step 2

Log in to the account infected with the Raldug virus. Start your Internet browser and download a legitimate anti-spyware program. Update the anti-spyware software and start a full system scan. Remove all entries detected.

If you cannot start your computer in Safe Mode with Networking, try performing a System Restore.

Video showing how to remove ransomware virus using "Safe Mode with Command Prompt" and "System Restore":

1. During your computer start process, press the F8 key on your keyboard multiple times until the Windows Advanced Options menu appears, and then select Safe Mode with Command Prompt from the list and press ENTER.

Boot your computer in Safe Mode with Command Prompt

2. When Command Prompt mode loads, enter the following line: cd restore and press ENTER.

system restore using command prompt type cd restore

3. Next, type this line: rstrui.exe and press ENTER.

system restore using command prompt rstrui.exe

4. In the opened window, click "Next".

restore system files and settings

5. Select one of the available Restore Points and click "Next" (this will restore your computer system to an earlier time and date, prior to the Raldug ransomware virus infiltrating your PC).

select a restore point

6. In the opened window, click "Yes".

run system restore

7. After restoring your computer to a previous date, download and scan your PC with recommended malware removal software to eliminate any remaining Raldug ransomware files.

To restore individual files encrypted by this ransomware, try using Windows Previous Versions feature. This method is only effective if the System Restore function was enabled on an infected operating system. Note that some variants of Raldug are known to remove Shadow Volume Copies of the files, so this method may not work on all computers.

To restore a file, right-click over it, go into Properties, and select the Previous Versions tab. If the relevant file has a Restore Point, select it and click the "Restore" button.

Restoring files encrypted by CryptoDefense

If you cannot start your computer in Safe Mode with Networking (or with Command Prompt), boot your computer using a rescue disk. Some variants of ransomware disable Safe Mode making its removal complicated. For this step, you require access to another computer.

To regain control of the files encrypted by Raldug, you can also try using a program called Shadow Explorer. More information on how to use this program is available here.

shadow explorer screenshot

To protect your computer from file encryption ransomware such as this, use reputable antivirus and anti-spyware programs. As an extra protection method, you can use programs called HitmanPro.Alert and EasySync CryptoMonitor, which artificially implant group policy objects into the registry to block rogue programs such as Raldug ransomware.

Note that Windows 10 Fall Creators Update includes "Controlled Folder Access" feature that blocks ransomware attempts to encrypt your files. By default this feature automatically protects files stored in Documents, Pictures, Videos, Music, Favorites as well as Desktop folders.

Controll Folder Access

Windows 10 users should install this update to protect their data from ransomware attacks. Here's more information on how to get this update and add additional protection layer from ransomware infections.

HitmanPro.Alert CryptoGuard - detects encryption of files and neutralises any attempts without need for user-intervention:

hitmanproalert ransomware prevention application

Malwarebytes Anti-Ransomware Beta uses advanced proactive technology that monitors ransomware activity and terminates it immediately - before reaching users' files:

malwarebytes anti-ransomware

  • The best way to avoid damage from ransomware infections is to maintain regular up-to-date backups. More information on online backup solutions and data recovery software Here.

Other tools known to remove Raldug ransomware: