Cetori Virus Removal Guide (+Decrypt .cetori files)

Cetori – Ransomware

Cetori is a harmful software working as typical ransomware. Michael Gillespie, the well-known virus researcher, first found this new name in the DJVU ransomware family.

Cetori was created for the sole purpose to encrypt all popular file types. Logically, as soon as the file encryption is successfully achieved, the users are unable to get access to them. Cetori ransomware adds its own “.cetori” to all the encrypted files. For example, the file “price_list.xls”, as soon as crypted by Cetori, will be entitled as “price_list.xls.cetori”. As soon as the file encryption is achieved, Cetori puts its own special text document (_readme.txt) into all the folders that save the encrypted files.

The message mentioned by _readme.txt requesting for the random os extremely comparable to the alerts provided by other ransomware dangers coming from the DJVU family. The caution generally shows that the data has been secured and the only option to get access to it is to use a special standalone key. Regretfully, this declaration is absolutely real.

The method to encrypt the files used by Cetori is not completely researched. Nevertheless, there is no doubt that each computer owner may be provided a special decryption key, which is absolutely unique. It is exceptionally tough to recuperate the information without the appropriate type in place.

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

Don't worry, you can return all your files! virus

One more peculiarity of the Cetori 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 complete control by the crooks who have launched the Cetori infection into the web. In order to get the key and bring back the essential data, the users are told to get in touch with the frauds by means of email or by telegram and to pay the ransom in the quantity of $980.

The message also states that individuals must call the Cetori authors within 72 hours upon the minute of the data file encryption. The alert suggests that by doing so individuals will acquire a 50% discount, for that reason, the ransom quantity drops down to $490.

No matter what the amount of the ransom is, we highly recommend that you do not pay the ransom. There is no warranty that these online criminals will keep their pledges, so they might not care at all what the victims feel about the file encryption, even when the amount of the ransom is received into their accounts. Thus, paying ransom typically does not result in a successful recovery. So, the users might simply lose their money for absolutely nothing.

Likewise, we prompt you not to contact the frauds as they instruct. Do not move loan into their wallets. There are no applications that could split the Cetori ransomware or bring back the information at no cost. For that reason, the only right decision is to restore the information from possible backups (if available).

Virus Summary

NameCetori Ransomware
File Extensioncetori
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-556 algorithm (CFB mode) encryption algorithm. Once the encryption is completed, the ransomware adds its special .cetori extension to all the files modified by it.
Distribution MethodAdware bundles and software cracks
Similar InfectionsMasodas, Vesrato, Nuksus
Removal Tool   GridinSoft Anti-Malware

Do not forget that the Internet is now filled with infections similar to the Cetori ransomware. For instance, this specific threat is generally identical to Brusaf and other ransomware-type infections. These destructive utilities have actually been developed in order to secure the crucial information and express the need for the users to pay the ransom. All these infections utilize the similar algorithm to produce the specific key for successful data decryption.

Unless the Cetori ransomware is still under the advancement procedure or has got some concealed bugs, it is not possible to restore the information by hand. Therefore, the only working solution to prevent the loss of your important information is to frequently preserve up-to-date backups of all your essential data.

Another crucial piece of suggestions is to store the backups on special storage not connected to your primary computer. For example, you might store it on the USB Flash Drive, or some external drive, or by using the cloud data storage services. Keeping the backups on your system drive is very dangerous, considering that the backup might also be encrypted by the Cetori infection.

Leakages for the Cetori ransomware attack.

Cetori uses many paths to infiltrate the susceptible computers. It is not specific what particular approach was used in your case, nevertheless, the intrusion might take place through the following channels:

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

There are times when the Cetori ransomware may disguise itself as some real application, for instance, through the deceptive informs requiring installation of some software application update. This is the most typical trick utilized by the frauds to inject the Cetori infection files into the system. This way users partially participate in its installation, without plainly understanding the threat.

Additionally, the scams may send unsolicited spam email with tricky alerts motivating individuals to open dubious accessories or click some download links, for example, those encouraging individuals to open particular pictures, text files, tax documents and other info.

No doubt, opening these files or clicking on the malicious links may basically damage the system. Fake Media Player update notices may result in the Cetori ransomware seepage. Similarly, downloading the cracked software application may in addition consist of the ransomware installer. The last but not the least, setup of Cetori might take place through some Trojan horses that might be set up stealthily into the system and without the user’s direct permission or perhaps authorization.

Preventing the Cetori virus attack.

Obviously, there is no absolute warranty that your computer system will be constantly without any malware attacks, nevertheless, we would like to share some useful suggestions with you to make it more secure. Make certain to pay very attention while browsing the web and specifically while getting cost-free programs. Do not open any dubious e-mail attachments, particularly if the sender is not known to you.

Do not forget that particular freeware installer may likewise include some other extra apps in the bundle. These extra applications may be very destructive. It is of utmost value to keep your anti-virus software application and your os in general to be constantly properly updated.

It is rather rational that downloading cracked software is unlawful, nevertheless, in addition, such unapproved software usage might also bring severe damage to your PC. Hence, do not download any cracked programs. Plus, the reality that your existing anti-virus did not safeguard the system from the Cetori ransomware is an excellent reason for you to reconsider your choices and change to another program that can render the safeguarding functions on a better level.

Below please find the quotation from the Cetori 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 “.cetori” extension added by the virus:”

Cetori Ransomware - encrypt files with .cetori extension

Use GridinSoft Anti-Malware to remove Cetori 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

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About 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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