.katyusha Files Virus – How to Remove
THREAT REMOVAL

.katyusha Files Virus – How to Remove

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

.katyusha Files Virus is one that encrypts your data and demands money as a ransom to get it restored. Files will receive the .katyusha extension as a secondary one, without any changes made to the original name of an encrypted file. The .katyusha Files Virus will leave ransomware instructions inside a text file. Keep on reading the article and see how you could try to potentially recover some of your locked files and data.

Threat Summary

Name.katyusha Files Virus
TypeRansomware, Cryptovirus
Short DescriptionThe ransomware encrypts files by placing the .katyusha extension on your computer system and demands a ransom to be paid to allegedly recover them.
SymptomsThe ransomware will encrypt your files and leave a ransom note with payment instructions.
Distribution MethodSpam Emails, Email Attachments
Detection Tool See If Your System Has Been Affected by .katyusha Files Virus

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Malware Removal Tool

User ExperienceJoin Our Forum to Discuss .katyusha Files Virus.
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.

.katyusha Files Virus – Update January 2019

.katyusha Files Virus continues to spread even in the beginning of 2019. Malware researchers have found out that the ransomware is using the “Double pulsar” and “Eternal blue” exploits. The .katyusha Files Virus may compromise computer systems by entering via the following methods:

  • Spear phishing
  • Malvertising
  • Spam mail
  • SMB exploit

On opening the main executable with which the malware comes, called “katyusha.exe” the following three files are dropped inside the C:\Windows\Temp directory:

  • Ktsi.exe
  • Zkts.exe
  • Svchost0.bat

On top of that, the ransommware avoids tampering with files in several directories, so it does not trigger anti-malware programs. It does that in order to complete its encryption process without any hindrances or opposition.

.katyusha Files Virus – Distribution Techniques

The .katyusha Files ransomware might distribute itself via different tactics. 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. Below, you can see the payload file of the cryptovirus being detected by 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.

.katyusha Files Virus – Detailed Analysis

.katyusha Files Virus is actually ransomware, so it encrypts your files and opens a ransom note, with instructions inside it, about the compromised computer machine. The extortionists want you to pay a ransom fee for the alleged restoration of your data.

.katyusha Files Virus might 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 start the virus automatically with each boot of the Windows Operating System.

After encryption the .katyusha Files virus might create a ransom note inside a text file. That text file is called _how_to_decrypt_you_files.txt and this is how it looks:

The ransom note has the following contents:

=====================================HOW TO DECRYPT YOU FILES====================================

All your documents, photos, databases and other important personal files were encrypted!!
Please send 0.5 bitcoins to my wallet address: 3ALmvAWLEothnMF5BjckAFaKB5S6zan9PK
If you paid, send the ID and IDKEY to my email: [email protected]
I will give you the key and tool
If there is no payment within three days
we will no longer support decryption
If you exceed the payment time, your data will be open to the public download
We support decrypting the test file.
Send two small than 2 MB files to the email address: [email protected]

Your ID:85478336
Your IDKEY:
================================================================================
[REDACTED]

================================================================================

Payment site https://www.bithumb.com/
Payment site http://www.coinone.com/
Payment site https://www.gopax.co.kr/
Payment site http://www.localbitcoins.com/

Officail Mail:[email protected]

The email that is known to be used by the cybercriminals who are behind the .katyusha Files Virus is the following:

The message showcased in the note, stemming from .katyusha files virus, indicates that your files are encrypted. You are demanded to pay “500 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.

.katyusha Files Ransomware – Encryption Process

The encryption process of the .katyusha Files ransomware rather simple – every file that gets encrypted will become simply unusable. Files will get the .katyusha extension after being locked. The extension is placed as a secondary one, without any changes made to the original name of an encrypted file.

A list with the targeted extensions of files which are sought to get encrypted is currently unknown. However, if the list becomes available, the article will get updated accordingly.

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

The .katyusha Files 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 .katyusha Files Virus and Try to Restore Encrypted Data

If your computer system got infected with the .katyusha Files 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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