What Is Ccyu Virus?
Ccyu is a ransomware sample that belongs to the globally spread ransomware family called STOP/DJVU. When this virus gets inside a computer system, it initiates a series of malicious changes that enable it to encrypt your personal files stored on your computer.
If you notice the .ccyu file extension appended to the names of your valuable files, you should know that they are no longer accessible. Encrypted .ccyu files can be used again only with the help of a decryption tool.
Ransomware operators use the _readme.txt ransom note to demand a huge amount of money in the form of Bitcoin. We advise against following the hackers’ instructions for the alleged file decryption.
Read this article to learn more about the Ccyu ransomware and its complete removal from the infected PC. You can also try to get your files to work again with the help of the alternative recovery methods we have listed at the end of the article.
Ccyu Virus Summary
|Name||Ccyu virus, also known as UDS:Trojan-Ransom.Win32.Stop.gen, Ransom:Win32/StopCrypt.KM!MTB, Win32:PWSX-gen [Trj], Win32:PWSX-gen [Trj], A Variant Of Win32/GenKryptik.FHJB – more detections of this virus on VirusTotal|
|Short Description||The ransomware encrypts files on your computer system and demands a ransom to be paid to allegedly recover them.|
|Symptoms||The Ccyu Virus ransomware will encrypt your files by appending the .ccyu extension to them.|
|Ransom Demanding Note||_readme.txt|
|Distribution Method||Spam Emails, Email Attachments|
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Ccyu Virus – How Did I Get Infected?Ccyu virus is one of the latest versions of STOP ransomware.
All STOP variants may find their way to computer systems via common methods of distribution. The payload file may appear as an email attachment that pretends to be a legitimate document. It may be stated to be a:
- Work-related file.
- E-Ticket for a event or a flight.
- Financial statement.
If the Ccyu virus uses documents infected with malicious macro scripts, it will run on the system the moment it is opened on the device. Then, the following process may occur:
There is one more strategy that may be used by hackers standing behind this computer virus infection. They could mask malicious payload files by hiding them in freeware software. Then they could upload infected packages to various third-party sites and describe them by using the following hoax statements:
- It’s a self extracting archive or regular archive.
- Download installation files for free.
- Obtain important software patch.
- Get a cracked portable version of legitimate app.
- Install software/game crack.
- Find key generator (or Keygen).
Ccyu Virus – What Does It Do?
When the Ccyu virus loads on a computer system, it may try to establish connection to a remote host and then download additional harmful payload files. Some of those files should be found and deleted from the following Windows directories:
This ransomware may also tamper with the Windows Registry Editor to achieve persistence. This common malware persistence mechanism lets hackers abuse legitimate operating system processes by adding entries to the run keys in Windows Registry or the Startup folder. As a result, all files and apps added by the ransomware will be executed when you log in the system. More specifically the following registry sub-keys may be infected:
Finally, Ccyu virus drops its ransom note called _readme.txt on the infected machine and place it in a directory that makes it visible, typically on the Desktop. When you notice it and open it you will see the following ransom message:
What Are .ccyu Files
The .ccyu files are locked as a result of the virus’ usage of the AES encryption algorithm. Hence, you cannot use your important data unless you find a way to decrypt or restore it.
During the encryption, the ransomware scans for the following types of files to encrypt:
- Audio (.mp3, .wav, etc.).
- Picture file kinds (.jpg, .png, .etc).
- Videos (.mp4, .avi, etc.).
- Archive file formats (.zip, .rar, etc).
- Documents of different types (.docx, .pptx, etc.).
As you may see all of the commonly used file types used for the storage of important personal data are among the targets of virus. Soon as a file gets encrypted by the virus, it starts to appear with the extension .ccyu after its original name:
How to Remove Ccyu Virus?
If you want to get rid of Ccyu virus from your computer system completely, our main suggestion is to follow the removal instructions that have been created below. They contain steps that are necessary to detect and delete this virus either by yourself or automatically. If you do not have the experience or the time to do this yourself, then experts strongly recommend that you scan your computer with anti-malware software to remove this virus automatically. Such a program is designed to thoroughly check and detect any malicious files and clean up your computer effectively.
How to Decrypt .ccyu Files?
In order to decrypt the .ccyu files, strongly suggest that you follow our STOP Ransomware File Decryption Guide. It contains the usage of the official decryption software for this virus, that is designed by independent malware researchers and works in case your decryption key that is used to unlock the files is offline-based. If you find a video tutorial on how to use this tool more convenient, then we suggest that you all follow the video decryption guide underneath.
Video guide for using the STOP Ransomware Decryptor:
What is Ccyu Ransomware?
Ccyu is a ransomware infection - the malicious software that enters your computer silently and blocks either access to the computer itself or encrypt your files.
Many ransomware viruses use sophisticated encryption algorithms to make your files inaccessible. The goal of ransomware infections is to demand that you pay a ransom payment to get access to your files back.
Can Ccyu Ransomware Cayse Damage?
Yes, ransomware can damage your computer. Ransomware is a malicious software that is designed to block access to your computer or files until a ransom is paid.
Ransomware can also damage your system, corrupt data and delete files, resulting in the permanent loss of important files.
Should I Ignore Viruses, Like Ccyu?
No, you should never ignore ransomware. It can encrypt your data and block access to your computer, making it impossible to access your files until you pay a ransom.
Ignoring ransomware could lead to the permanent loss of your data, as well as the potential for the ransomware to spread to other computers on your network. Additionally, paying the ransom does not guarantee that your data will be recovered.
How Does Ccyu Infect?
Via several ways.Ccyu Ransomware infects computers by being sent via phishing emails, containing virus attachment.
This attachment is usually masked as an important document, like an invoice, bank document or even a plane ticket and it looks very convincing to users.
After you download and execute this attachment, a drive-by download occurs and your computer is infected with the ransomware virus.
Another way you may become a victim of Ccyu is if you download a fake installer, crack or patch from a low reputation website or if you click on a virus link. Many users report getting a ransomware infection by downloading torrents.
How to Open .Ccyu files?
You can't. At this point, the .Ccyu files are encrypted. You can only open them once they are decrypted using a specific decryptionkey for the particular algorithm.
What to Do If a Decryptor Does Not Work?
Do not panic, and backup the files. If a decryptor did not decrypt your .Ccyu files successfully, then do not despair, because this virus is still new.
Can I Restore ".Ccyu" Files?
Yes, sometimes files can be restored. We have suggested several file recovery methods that could work if you want to restore .Ccyu files.
These methods are in no way 100% guaranteed that you will be able to get your files back. But if you have a backup, your chances of success are much greater.
How To Get Rid of Ccyu Virus?
The safest way and the most efficient one for the removal of this ransomware infection is the use a professional anti-malware program.
It will scan for and locate Ccyu ransomware and then remove it without causing any additional harm to your important .Ccyu files.
Also, keep in mind that viruses like Ccyu ransomware also install Trojans and keyloggers that can steal your passwords and accounts.
What to Do If I Cant Get The Files Back?
There is still a lot you can do. If none of the above methods seem to work for you, then try these methods:
- Try to find a safe computer from where you can can login on your own line accounts like One Drive, iDrive, Google Drive and so on.
- Try to contact your friends, relatives and other people so that they can check if they have some of your important photos or documents just in case you sent them.
- Also, check if some of the files that were encrypted can be re-downloaded from the web.
- Another clever way is to find another old computer, a flash drive or even a CD or a DVD where you may have saved your older documents. You might be surprised what will turn up.
- You can also go to your email account to check if you can send any attachments to other people. Usually what is sent the email is saved on your account and you can re-download it. But most importantly, make sure that this is done from a safe computer and make sure to remove the virus first.
More tips you can find on our forums, where you can also asks any questions about your ransomware problem.
How to Report Ransomware to Authorities?
In case your computer got infected with a ransomware infection, you can report it to the local Police departments. It can help authorities worldwide track and determine the perpetrators behind the virus that has infected your computer.
Below, we have prepared a list with government websites, where you can file a report in case you are a victim of a cybercrime:
Cyber-security authorities, responsible for handling ransomware attack reports in different regions all over the world:
Germany - Offizielles Portal der deutschen Polizei
United States - IC3 Internet Crime Complaint Centre
United Kingdom - Action Fraud Police
France - Ministère de l'Intérieur
Italy - Polizia Di Stato
Spain - Policía Nacional
Netherlands - Politie
Poland - Policja
Portugal - Polícia Judiciária
Greece - Cyber Crime Unit (Hellenic Police)
India - Mumbai Police - CyberCrime Investigation Cell
Australia - Australian High Tech Crime Center
Reports may be responded to in different timeframes, depending on your local authorities.
Can You Stop Ransomware from Encrypting Your Files?
Yes, you can prevent ransomware. The best way to do this is to ensure your computer system is updated with the latest security patches, use a reputable anti-malware program and firewall, backup your important files frequently, and avoid clicking on malicious links or downloading unknown files.
Can Ccyu Ransomware Steal Your Data?
Yes, in most cases ransomware will steal your information. It is a form of malware that steals data from a user's computer, encrypts it, and then demands a ransom in order to decrypt it.
Can Ransomware Infect WiFi?
Yes, ransomware can infect WiFi networks, as malicious actors can use it to gain control of the network, steal confidential data, and lock out users. If a ransomware attack is successful, it could lead to a loss of service and/or data, and in some cases, financial losses.
Should I Pay Ransomware?
No, you should not pay ransomware extortionists. Paying them only encourages criminals and does not guarantee that the files or data will be restored. The better approach is to have a secure backup of important data and be vigilant about security in the first place.
What Happens If I Don't Pay Ransom?
If you don't pay the ransom, the hackers may still have access to your computer, data, or files and may continue to threaten to expose or delete them, or even use them to commit cybercrimes. In some cases, they may even continue to demand additional ransom payments.
Why Is the Ransom Paid in Crypto?
Cryptocurrency is a secure and untraceable form of payment, making it the ideal choice for ransom payments. It is difficult to trace, and the transactions are almost instantaneous. This means it is nearly impossible for authorities to track the payment and recover the money.
Can Ransomware Attack Be Detected?
Yes, ransomware can be detected. Anti-malware software and other advanced security tools can detect ransomware and alert the user when it is present on a machine.
It is important to stay up-to-date on the latest security measures and to keep security software updated to ensure ransomware can be detected and prevented.
Do Ransomware Criminals Get Caught?
Yes, ransomware criminals do get caught. Law enforcement agencies, such as the FBI, Interpol and others have been successful in tracking down and prosecuting ransomware criminals in the US and other countries. As ransomware threats continue to increase, so does the enforcement activity.
About the Ccyu Research
The content we publish on SensorsTechForum.com, this Ccyu how-to removal guide included, is the outcome of extensive research, hard work and our team’s devotion to help you remove the specific malware and restore your encrypted files.
How did we conduct the research on this ransomware?
Our research is based on an independent investigation. We are in contact with independent security researchers, and as such, we receive daily updates on the latest malware and ransomware definitions.
To better understand the ransomware threat, please refer to the following articles which provide knowledgeable details.
As a site that has been dedicated to providing free removal instructions for ransomware and malware since 2014, SensorsTechForum’s recommendation is to only pay attention to trustworthy sources.
How to recognize trustworthy sources:
- Always check "About Us" web page.
- Profile of the content creator.
- Make sure that real people are behind the site and not fake names and profiles.
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