Djvu VirusRansomwareRemoval Guide

Sapp Virus Removal Guide (+Decrypt .sapp files)

Sapp Virus Ransomware

Sapp is a destructive software application working as common ransomware. Michael Gillespie, the popular malware researcher, very first discovered this new name in the DJVU ransomware family.

Sapp was developed for the sole purpose to encrypt all popular file types. Logically, as soon as the file encryption is successfully accomplished, the users are not able to get access to them. Sapp ransomware includes its own “.sapp” to all the encrypted files. For instance, the file “price_list.xls”, once modified by Sapp, will be titled as “price_list.xls.sapp”. When the encryption is achieved, Sapp puts its own unique text file (_readme.txt) into all the folders that save the encrypted files.

The alert mentioned by document requesting the random os very similar to the notices offered by other ransomware dangers belonging to the DJVU family. The caution generally indicates that the information has been encrypted and the only service to get access to it is to use a distinct standalone key. Regretfully, this declaration is absolutely real.

The method to secure the files used by Sapp is not totally looked into. Nevertheless, there is no doubt that each computer system owner might be provided an unique decryption key, which is definitely distinct. It is extremely difficult to recover the information without the appropriate key in location.

“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 Sapp 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 criminals who have released the Sapp ransomware into the world wide web. In order to get the key and bring back the crucial data, the users are told to get in touch with the frauds through email or by telegram and to pay the ransom in the quantity of $980.

The message also says that the people ought to get in touch with the Sapp authors within 72 hours upon the minute of the data encryption. The alert suggests that by doing so individuals will acquire a 50% discount, for that reason, the ransom amount drops down to $490.

No matter what the amount of the ransom is, we highly advise that you do not pay the ransom. There is no warranty that these online crooks will keep their guarantees, so they may not care at all what the victims feel about the encryption, even when the quantity of the ransom is received into their accounts. Hence, paying ransom typically does not result in an effective healing. So, the users might simply lose their money for nothing.

Similarly, we urge you not to contact the scams as they advise. Do not move loan into their wallets. There are no applications that might break the Sapp ransomware or restore the data at no charge. For that reason, the only correct choice is to restore the data from possible backups (if readily available).

Virus Summary

NameSapp Ransomware
File Extensionsapp
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 .sapp extension to all the files modified by it.
Distribution MethodAdware bundles and software cracks
Similar InfectionsLokas, Besub, Nusar
Sapp Removal Tool   GridinSoft Anti-Malware
Sapp Decryption Tool   Emsisoft Djvu Decryptor

Do not forget that the Internet is now filled with infections similar to the Sapp virus. For instance, this specific hazard is basically identical to Brusaf and other ransomware-type infections. These damaging utilities have been established in order to secure the crucial data and express the need for the users to pay the ransom. All these infections utilize the identical algorithm to create the particular key for effective information decryption.

Unless the Sapp ransomware is still under the advancement process or has actually got some hidden bugs, it is not possible to bring back the information manually. Therefore, the only working solution to prevent the loss of your essential information is to frequently preserve up-to-date backups of all your essential data.

Another important piece of advice is to save the backups on special storage not linked to your main PC. For example, you may save it on the USB Flash Drive, or some external disk drive, or by using the cloud data storage services. Keeping the backups on your routine drive is really dangerous, since the backup might likewise be encrypted by the Sapp .

Leaks for the Sapp ransomware attack.

Sapp utilizes numerous paths to penetrate the susceptible computers. It is not specific what specific approach was used in your case, nevertheless, the invasion might take place via the following channels:

  • bundling with third-party programs, mainly free apps;
  • spam emails from the unidentified senders;
  • sites supplying complimentary hosting;
  • P2P (peer-to-peer) torrent software.

There are times when the Sapp may camouflage itself as some genuine application, for example, through the misleading notifies requiring installation of some software application upgrade. This is the most common trick used by the frauds to inject the Sapp infection files into the system. By doing this users partly take part in its installation, without clearly understanding the threat.

Additionally, the scams may send unsolicited spam e-mail with tricky informs encouraging individuals to open suspicious attachments or click on some download links, for instance, those motivating individuals to open particular photos, text files, tax documents and other information.

No doubt, opening these files or clicking the destructive links may essentially damage the system. Fake Media Player upgrade notices may lead to the Sapp ransomware infiltration. Likewise, downloading the cracked software application might in addition include the ransomware installer. The last but not the least, installation of Sapp might happen through some Trojan horses that might be installed stealthily into the system and without the user’s direct permission or perhaps permission.

Avoiding the Sapp ransomware attack.

Naturally, there is no outright guarantee that your computer will be always devoid of any malware attacks, however, we want to share some beneficial pointers with you to make it more secure. Make sure to pay very attention while browsing the web and specifically while downloading cost-free programs. Do not open any suspicious e-mail accessories, especially if the sender is not understood to you.

Do not forget that specific freeware installer may also include some other additional apps in the bundle. These extra applications may be very damaging. It is of utmost importance to keep your anti-virus software application and your operating system in general to be always properly updated.

It is rather logical that downloading pirated programs is unlawful, nevertheless, additionally, such unauthorized apps usage may likewise bring major damage to your system. Hence, do not download any split programs. Plus, the reality that your existing anti-virus did not secure the system from the Sapp ransomware is an excellent factor for you to reevaluate your options and switch to another program that can render the protecting functions on a much better level.

Below please find the quotation from the Sapp 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 “.sapp” extension added by the virus:”

Sapp Ransomware - encrypt files with .sapp extension

Use GridinSoft Anti-Malware to remove Sapp 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 sapp 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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