Djvu VirusRansomwareRemoval Guide

Ccyu Virus Removal Guide (+Decrypt .ccyu files)

Ccyu Virus Ransomware

Ccyu is a malicious software working as common ransomware. Michael Gillespie, the popular virus researcher, very first found this new name in the DJVU ransomware family.

Ccyu was created for the sole function to encrypt all popular file types. Rationally, as soon as the file encryption is effectively accomplished, the users are not able to get access to them. Ccyu virus adds its own “.ccyu” to all the encrypted data. For example, the file “price_list.xls”, as soon as crypted by Ccyu, will be titled as “price_list.xls.ccyu”. Once the encryption is achieved, Ccyu puts its own special text document (_readme.txt) into all the folders that save the encrypted files.

The message stated by _readme.txt requesting the random os really similar to the notifications offered by other ransomware threats coming from the DJVU family. The warning basically shows that the information has been secured and the only solution to get access to it is to use a special standalone key. Regretfully, this declaration is definitely real.

The approach to encrypt the files utilized by Ccyu is not completely researched. However, there is no doubt that each computer system owner may be released an unique decryption key, which is definitely unique. It is exceptionally hard to recuperate the data without the proper type in location.

“Don’t worry, you can return all your files!”, from text file message:

message from Ccyu virus

One more peculiarity of the Ccyu virus is that the users are not able to get access to the key. The decrypting key is hosted on an unique server under the total control by the scoundrels who have actually introduced the Ccyu ransomware into the world wide web. In order to acquire the key and bring back the crucial information, the users are told to get in touch with the scams via e-mail or by telegram and to pay the ransom in the amount of $980.

The message also states that individuals must contact the Ccyu authors within 72 hours upon the moment of the data file encryption. The alert shows that by doing so the people will obtain a 50% discount, therefore, the ransom quantity falls to $490.

No matter what the quantity of the ransom is, we strongly encourage that you do not pay the ransom. There is no warranty that these online scoundrels will keep their guarantees, so they may not care at all what the victims feel about the file encryption, even when the amount of the ransom is gotten into their accounts. For this reason, paying ransom typically does not lead to a successful recovery. So, the users may just lose their money for absolutely nothing.

Likewise, we urge you not to contact the scams as they instruct. Do not move loan into their wallets. There are no applications that could split the Ccyu virus or bring back the data at no cost. Therefore, the only appropriate choice is to bring back the data from possible backups (if offered).

Virus Summary

NameCcyu Ransomware
File Extensionccyu
Short DescriptionThe ransomware encrypts all the data stored on your system and requires a ransom to be paid on your part supposedly to recover your important files.
SymptomsFile encryption by the ransomware is performed by means of the AES-256 algorithm (CFB mode) encryption algorithm. Once the encryption is completed, the ransomware adds its special .ccyu extension to all the files modified by it.
Distribution MethodAdware bundles and software cracks
Similar InfectionsLokas, Besub, Nusar
Ccyu Removal Tool   GridinSoft Anti-Malware
Ccyu Decryption Tool   Emsisoft Djvu Decryptor

Do not forget that the Web is now full of infections comparable to the Ccyu virus. For example, this particular threat is basically similar to Brusaf and other ransomware-type infections. These destructive utilities have actually been developed in order to encrypt the important data and reveal the demand for the users to pay the ransom. All these infections use the similar algorithm to produce the particular key for effective data decryption.

Unless the Ccyu ransomware is still under the advancement procedure or has got some concealed bugs, it is not possible to bring back the data manually. Therefore, the only working option to prevent the loss of your essential data is to frequently keep updated backups of all your crucial files.

Another crucial piece of guidance is to save the backups on unique storage not connected to your primary PC. For instance, you may keep it on the USB Flash Drive, or some external drive, or by using the cloud data storage services. Keeping the backups on your routine drive is really risky, because the backup might likewise be encrypted by the Ccyu infection.

Leakages for the Ccyu ransomware attack.

Ccyu utilizes lots of paths to infiltrate the vulnerable computers. It is not certain what particular approach was used in your case, however, the intrusion may take place by means of the following channels:

  • bundling with third-party programs, generally freeware;
  • spam e-mails from the unknown senders;
  • websites offering complimentary hosting;
  • P2P (peer-to-peer) torrent software.

There are times when the Ccyu virus may disguise itself as some real application, for instance, through the misleading signals requiring setup of some software application upgrade. This is the most common trick used by the frauds to inject the Ccyu ransomware files into the system. This way users partially participate in its setup, without clearly comprehending the danger.

Furthermore, the scams may send out unsolicited spam email with challenging informs motivating individuals to open dubious accessories or click on some download links, for example, those encouraging individuals to open specific photos, text files, tax documents and other info.

No doubt, opening these files or clicking on the harmful links may basically harm the system. Fake Acrobat Reader upgrade notifications may cause the Ccyu ransomware seepage. Similarly, downloading the split software application might furthermore contain the ransomware installer. The last however not the least, installation of Ccyu may happen through some Trojan horses that might be installed stealthily into the system and without the user’s direct approval or even permission.

Preventing the Ccyu injection.

Naturally, there is no outright assurance that your computer will be always without any malware attacks, nevertheless, we would like to share some helpful suggestions with you to make it much safer. Make sure to pay extremely very close attention while browsing the web and specifically while getting cost-free programs. Do not open any dubious e-mail attachments, especially if the sender is not understood to you.

Do not forget that particular freeware installer may also contain some other extra apps in the package. These extra applications may be really harmful. It is of utmost significance to keep your anti-virus software and your operating system in basic to be constantly appropriately upgraded.

It is rather logical that downloading cracked apps is prohibited, however, additionally, such unauthorized software use may likewise bring major damage to your PC. Thus, do not download any split programs. Plus, the truth that your current anti-virus did not protect the system from the Ccyu ransomware is an excellent reason for you to reconsider your choices and change to another program that can render the securing functions on a much better level.

Below please find the quotation from the Ccyu text file:


 Don't worry, 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" or "Junk" 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:

 Our Telegram account:

Screenshot of files with “.ccyu” extension added by the virus:”

Ccyu Ransomware - encrypt files with .ccyu extension

Use GridinSoft Anti-Malware to remove Ccyu ransomware from your computer

1.Download GridinSoft Anti-Malware.

You can download GridinSoft Anti-Malware by clicking the button below:

  GridinSoft Anti-Malware

2. Double-click on the setup file.

When setup file has finished downloading, double-click on the setup-antimalware-ag.exe file to install GridinSoft Anti-Malware on your computer.
GridinSoft Anti-Malware
An User Account Control asking you about to allow GridinSoft Anti-Malware to make changes to your device. So, you should click “Yes” to continue with the installation.
GridinSoft Anti-Malware Setup

3. Press Install button for run GridinSoft Anti-Malware.

GridinSoft Anti-Malware Install

3.Once installed, GridinSoft Anti-Malware will automatically run.

GridinSoft Anti-Malware  Start

4. Wait for the GridinSoft Anti-Malware scan to complete.

GridinSoft Anti-Malware will automatically start scanning your computer for Win Speedup 2018 and other malicious programs. This process can take a 20-30 minutes, so we suggest you periodically check on the status of the scan process.
GridinSoft Anti-Malware Scan

5. Click on “Clean Now”.

When the scan has completed, you will see the list of infections that GridinSoft Anti-Malware has detected. To remove them click on the “Clean Now” button in right corner.
GridinSoft Anti-Malware Scan Result

Use Emsisoft Decryptor for restore ccyu files

You can download Emsisoft Decryptor by clicking the button below:

  Emsisoft Decryptor

  1. Run the decryptor as an administrator. The license terms will show up, which you have to agree to by clicking the “Yes” button.
  2. Once the license terms are accepted, the primary decryptor user interface opens.
  3. By default, the decryptor will pre-populate the locations to decrypt with the currently connected drives and network drives. Additional locations can be added using the Add” button.
  4. Decryptors typically offer various options depending on the particular malware family. The available options are located in the Options tab and can be enabled or disabled there. You can find a detailed list of the available Options below.
  5. After you have added all the locations you want to decrypt to the list, click the “Decrypt” button to start the decryption process. The screen will switch to a status view, informing you about the current process and decryption status of your files
  6. The decryptor will inform you once the decryption process is finished. If you require the report for your personal records, you can save it by clicking the “Save log” button. You can also copy it straight to your clipboard to paste it into emails or forum posts if you are asked to.
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Daniel Zimmermann

Daniel Zimmermann has been writing on security and malware subjects for many years and has been working in the security industry for over 10 years. Daniel was educated at the Saarland University in Saarbrücken, Germany and currently lives in New York.

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