Remove Desu Ransomware - Restore .desu Files

Remove Desu Ransomware – Restore .desu Files

This article will aid you to remove Desu ransomware absolutely. Follow the ransomware removal instructions provided at the end of the article.

Desu is a virus that encrypts your files and demands money as a ransom to get your files recovered. The Desu cryptovirus will encrypt your data and files, while placing the .desu extension to every one of them. After encryption the MBR file of your computer system will be tampered and load a message upon restart. Continue reading the article and see how you could try to potentially recover some of your files.

Threat Summary

TypeRansomware, Cryptovirus
Short DescriptionThe ransomware encrypts files on your computer system and demands a ransom to be paid to allegedly recover them describing its terms in a note.
SymptomsThe ransomware will encrypt your files by placing the .desu extension to them.
Distribution MethodSpam Emails, Email Attachments
Detection Tool See If Your System Has Been Affected by Desu


Malware Removal Tool

User ExperienceJoin Our Forum to Discuss Desu.
Data Recovery ToolWindows Data Recovery by Stellar Phoenix Notice! This product scans your drive sectors to recover lost files and it may not recover 100% of the encrypted files, but only few of them, depending on the situation and whether or not you have reformatted your drive.

Desu Ransomware – Update January 2019

Update! A decryption tool is now available for Desu ransomware! The tool was created by the malware researcher Michael Gillespie and can be downloaded from the following link, wrapped inside a .zip archive: The tool is designed to decrypt the following variants of the cryptovirus: .ONI, .desu, .Aurora, .aurora, .Nano and .Animus.

Desu Ransomware – Update August 2018

Desu ransomware continues to be spread and already has a few versions with small variations being released at the beginning of August. The ransom note messages have changed their names to:

  • @_RESTORE_PC_1.txt
  • @_RESTORE_PC_2.txt
  • @_RESTORE_PC_3.txt

The email address for contacting the cybercriminals has changed to [email protected] and may differ with each new variant of Desu ransomware. Other than the fact that more and more iterations are being found in the wild faster and gaining some sort of momentum, nothing else can be added about the Desu ransomware developments for the time being.

Desu Ransomware – Methods of Distribution

Desu ransomware might distribute its malicious files by using various methods. A payload dropper which initiates the malicious script for this ransomware is being spread around the World Wide Web, and researchers have gotten their hands on a malware sample. If that file lands on your computer system and you somehow execute it – your computer device will become infected.

In the screenshot given below, you can see the payload of the ransomware being detected by multiple security engines on the VirusTotal service:

Freeware which is found on the Web can be presented as helpful also be hiding the malicious script for the cryptovirus. Refrain from opening files right after you have downloaded them. You should first scan them with a security tool, while also checking their size and signatures for anything that seems out of the ordinary. You should read the tips for preventing ransomware located at the corresponding forum thread.

Desu Ransomware – Technical Description

Desu is a virus that encrypts your files and places a .txt file, with instructions inside it, about the compromised computer device. The extortionists want you to pay a ransom fee for the alleged restoration of your files.

Desu ransomware could make entries in the Windows Registry to achieve persistence, and could launch or repress processes in a Windows environment. Such entries are typically designed in a way to launch the virus automatically with each start of the Windows operating system.

After encryption the Desu virus shows a ransom message located inside the following file:

You can see the contents of the @[email protected] file, from the following screenshot provided below:

The ransom message states the following:

==============================# desu ransomware #==============================

SORRY! Your files are encrypted.

File contents are encrypted with random key.

we STRONGLY RECOMMEND you NOT to use any “decryption tools”.

These tools can damage your data, making recover IMPOSSIBLE.

Also we recommend you not to contact data recovery companies.

They will just contact us, buy the key and sell it to you at a higher price.

If you want to decrypt your files, you have to get private key.

In order to get private key, write here:

[email protected]

And send me your id: [redacted] ! !

And pay 200$ on 1ARDXRQsvnsYiM5jZczFagtCrAzSFC1Qmy wallet

If someone else offers you files restoring, ask him for test decryption.

Only we can successfully decrypt your files; knowing this can protect you from fraud.

You will receive instructions of what to do next.

==============================# desu ransomware #==============================

As seen above, the following e-mail address is being used:

By observing the note, the email for contact and the opinions of some malware researchers, it is very possible that the Desu ransomware is a variant of the Animus Ransomware Virus.

The note of the Desu ransomware virus states that your files are encrypted. You are demanded to pay 200 US dollars to allegedly restore your files. However, you should NOT under any circumstances pay any ransom sum. Your files may not get recovered, and nobody could give you a guarantee for that. Adding to that, giving money to cybercriminals will most likely motivate them to create more ransomware viruses or commit different criminal activities. That may even result to you getting your files encrypted all over again after payment.

Desu Ransomware – Encryption Process

What is known for the encryption process of the Desu ransomware is that every file that gets encrypted will become simply unusable. All encrypted files will receive the “.desu” extension appended to them. The malware researcher Michael Gillespie believes that the Tiny Encryption Algorithm (TEA) or the Extended Tiny Encryption Algorithm (XTEA) is being used for the encryption process, but that remains to be proved.

A list with the targeted extensions of files which are sought to get encrypted is currently known to be the following:

→.pdf, .db, .doc, .docx, .js, .mp3, .jpg, .png, .xls, .xlsx,

However, if the list becomes more complete, the article will get duly updated with the new additions.

The files used most by users and which are probably encrypted are from the following categories:

  • Audio files
  • Video files
  • Document files
  • Image files
  • Backup files
  • Banking credentials, etc

On top of that the MBR (Master Boot Record) will be overwritten and the following message will be displayed upon restarting the operating system:

The Desu cryptovirus could be set to erase all the Shadow Volume Copies from the Windows operating system with the help of the following command:

→vssadmin.exe delete shadows /all /Quiet

In case the above-stated command is executed that will make the effects of the encryption process more efficient. That is due to the fact that the command eliminates one of the prominent ways to restore your data. If a computer device was infected with this ransomware and your files are locked, read on through to find out how you could potentially restore some files back to their normal state.

Remove Desu Ransomware and Restore .desu Files

If your computer system got infected with the Desu ransomware virus, you should have a bit of experience in removing malware. You should get rid of this ransomware as quickly as possible before it can have the chance to spread further and infect other computers. You should remove the ransomware and follow the step-by-step instructions guide provided below.

Tsetso Mihailov

Tsetso Mihailov

Tsetso Mihailov is a tech-geek and loves everything that is tech-related, while observing the latest news surrounding technologies. He has worked in IT before, as a system administrator and a computer repair technician. Dealing with malware since his teens, he is determined to spread word about the latest threats revolving around computer security.

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