KITZ VIRUS (.kitz FILE) RANSOMWARE 🔐 FIX & DECRYPT DATA

Kitz Virus is a type of STOP/DJVU ransomware that encrypts files on the infected computer and demands payment in exchange for the decryption key. It typically spreads through spam emails, fake software updates, or malicious downloads. If your files are encrypted by Kitz Virus, it is important not to pay the ransom as there is no guarantee that you will receive the decryption key or that your files will be recovered.

Kitz uses a unique key for each victim, with one exception:

  • If Kitz cannot establish a connection to its command and control server (C&C Server) before starting the encryption process, it uses the offline key. This key is the same for all victims, making it possible to decrypt files encrypted during a ransomware attack.

I have gathered a complete collection of all possible solutions, tips, and practices in neutralizing the Kitz virus and decrypting files. In some cases, it is easy to recover your files. And sometimes it is just impossible.

There are several universal methods for recovering encrypted .kitz files, which will be demonstrated below. It is vital to read the entire instruction manual carefully and make sure to understand it all. Do not skip any steps. Each of these steps is very important and must be completed by you.

Kitz virus?

☝️ Kitz can be correctly identified as a STOP/DJVU ransomware infection.

Kitz

🤔 Kitz virus is ransomware that originates from the DJVU/STOP family. Its primary purpose is to encrypt files that are important to you. After that ransomware virus asks its victims for a ransom fee ($490 – $980) in BitCoin.

The Kitz ransomware is a kind of threat that encrypted your documents and then forces you to pay for them. Note that Djvu/STOP ransomware family was first revealed and analyzed by virus analyst Michael Gillespie.

Kitz virus is similar to other representatives of DJVU ransomware like: Kiwm, Kifr, Torm. This virus encrypts all popular file types and adds its particular “.kitz” extension into all files. For instance, the file “1.jpg”, will be amended into “1.jpg.kitz“. As soon as the encryption is accomplished, the virus generates a specific message file “_readme.txt” and adds it to all folders that contain the modified files.

The image below gives a clear vision of how the files with “.kitz” extension look like:

Kitz Virus - encrypted .kitz files

Kitz File (STOP/DJVU Ransomware)

Name Kitz Virus
Ransomware family1 DJVU/STOP2 ransomware
Extension .kitz
Ransomware note _readme.txt
Ransom From $490 to $980 (in Bitcoins)
Contact [email protected], [email protected]
Detection Win32/GenKryptik_AGen.WF, Virlock.Ransom.FileInfector.DDS, MSIL/Agent.XX
Symptoms
  • Encrypted most of your files (photos, videos, documents) and adds a particular “.kitz” extension;
  • Can delete Volume Shadow copies to make victim’s attempts to restore data impossible;
  • Adds a list of domains to HOSTS file to block access to certain security-related sites;
  • Installs password-stealing Trojan on the system, like Vidar Stealer or RedLine Stealer;
  • Manages to install a SmokeLoader backdoor;
Fix Tool To remove possible malware infections, scan your PC:
6-day free trial available.

This text asking payment is for restoring files via decryption key:

_readme.txt (STOP/DJVU Ransomware)

_readme.txt (STOP/DJVU Ransomware) – The scary alert demanding from users to pay the ransom to decrypt the encoded files contains these frustrating warnings

Kitz ransomware arrives as a set of processes that are meant to perform different tasks on a victim’s computer. One of the first ones being launched is winupdate.exe, a tricky process that displays a fake Windows update prompt during the attack. This is meant to convince the victim that a sudden system slowdown is caused by a Windows update. However, at the same time, the ransomware runs another process (usually named after four random characters) which starts scanning the system for target files and encrypting them. Next, the ransomware deletes Volume Shadow Copies from the system using the following CMD command:

vssadmin.exe Delete Shadows /All /Quiet

Once deleted, it becomes impossible to restore the previous computer state using System Restore Points. The thing is, ransomware operators are getting rid of any Windows OS-based methods that could help the victim to restore files for free. In addition, the crooks modify the Windows HOSTS file by adding a list of domains to it and mapping them to the localhost IP. As a result, the victim will run into a DNS_PROBE_FINISHED_NXDOMAIN error when accessing one of the blocked websites.

We noticed that ransomware attempts to block websites that publish various how-to guides for computer users. It is evident that by restricting specific domains, the crooks are trying to prevent the victim from reaching relevant and helpful ransomware-attack-related information online. The virus also saves two text files on the victim’s computer that provide attack-related details – the victim’s public encryption key and personal ID. These two files are called bowsakkdestx.txt and PersonalID.txt.

Kitz ransomware virus saves public encryption key and victim's id in bowsakkdestx.txt file

After all these modifications, the malware doesn’t stop. Variants of STOP/DJVU tend to drop Vidar password-stealing Trojan on compromised systems. This threat has a lengthy list of capabilities, such as:

  • Stealing Steam, Telegram, Skype login/password;
  • Stealing cryptocurrency wallets;
  • Downloading malware to the computer and running it;
  • Stealing browser cookies, saved passwords, browsing history, and more;
  • Viewing and manipulating files on victim’s computer;
  • Allowing the hackers to perform other tasks on the victim’s computer remotely.

The cryptography algorithm used by DJVU/STOP ransomware family is AES-256. So, if your files got encrypted with an online decryption key, which is totally distinct. The sad reality is that it is impossible to decrypt files without a unique key.

In case Kitz worked in online mode, it is impossible for you to gain access to the AES-256 key. It is stored on a distant server owned by the frauds who distribute the Kitz virus.

For receiving the decryption key the payment should be $980. To obtain the payment details, the victims are encouraged by the message to contact the frauds by email ([email protected]).

The message by the ransomware states the following information:

ATTENTION!

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:

https://we.tl/t-WJa63R98Ku

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:

[email protected]

Reserve e-mail address to contact us:

[email protected]

Your personal ID:
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

Do not pay for Kitz!

Please, try to use the available backups, or Decrypter tool

_readme.txt file also indicates that the computer owners must get in touch with the Kitz representatives within 72 hours starting from the moment of files were encrypted. On the condition of getting in touch within 72 hours, users will be granted a 50% rebate. Thus the ransom amount will be minimized to $490). Yet, stay away from paying the ransom!

I definitely recommend that you do not contact these crooks and do not pay. One of the most real working solutions to recover lost data – just using the available backups, or using Decrypter tool.

The peculiarity of all such viruses apply a similar set of actions for generating the unique decryption key to recover the ciphered data.

Thus, unless the ransomware is still in the stage of development or possesses some hard-to-track flaws, manually recovering the ciphered data is a thing you can’t perform. The only solution to prevent the loss of your valuable data is to regularly make backups of your crucial files.

Note that even if you do maintain such backups regularly, they ought to be put into a specific location without loitering, not being connected to your main workstation.

For instance, the backup may be kept on the USB flash drive or some alternative external hard drive storage. Optionally, you may refer to the help of online (cloud) information storage.

Needless to mention, when you maintain your backup data on your common device, it may be similarly ciphered as well as other data.

For this reason, locating the backup on your main PC is surely not a good idea.

How I was infected?

Ransomware has various methods to build into your system. But it doesn’t really matter what concrete way had a place in your case.

Kitz virus attack

Kitz ransomware attack following a successful phishing attempt.

Nevertheless, these are the common leaks through which it may be injected into your PC:
  • hidden installation along with other apps, especially the utilities that work as freeware or shareware;
  • dubious link in spam emails leading to the virus installer
  • online free hosting resources;
  • using illegal peer-to-peer (P2P) resources for downloading pirated software.

There were cases when the Kitz virus was disguised as some legitimate tool, for example, in the messages demanding to initiate some unwanted software or browser updates. This is typically the way how some online frauds aim to force you into installing the Kitz ransomware manually, by actually making you directly participate in this process.

Surely, the bogus update alert will not indicate that you are going to actually inject the ransomware. This installation will be concealed under some alert mentioning that allegedly you should update Adobe Flash Player or some other dubious program whatsoever.

Of course, the cracked apps represent the damage too. Using P2P is both illegal and may result in the injection of serious malware, including the Kitz ransomware.

To sum up, what can you do to avoid the injection of the Kitz ransomware into your device? Even though there is no 100% guarantee to prevent your PC from getting damaged, there are certain tips I want to give you to prevent Kitz penetration. You must be cautious while installing free software today.

Make sure you always read what the installers offer in addition to the main free program. Stay away from opening dubious email attachments. Do not open files from unknown addresses. Of course, your current security program must always be updated.

The malware does not speak openly about itself. It will not be mentioned in the list of your available programs. However, it will be masked under some malicious process running regularly in the background, starting from the moment when you launch your PC.

How To Remove Kitz Virus?

In addition to encoding a victim’s files, the Kitz virus has also started to install the Vidar Stealer on the system to steal account credentials, cryptocurrency wallets, desktop files, and more.3
Reasons why I would recommend GridinSoft4
  1. Run the setup file.

    Run Setup.exe
    GridinSoft Anti-Malware Setup
  2. Press the “Install” button.

    GridinSoft Anti-Malware Install
  3. Once installed, Anti-Malware will automatically run.

    GridinSoft Anti-Malware Splash-Screen
  4. Wait for complete.

    GridinSoft Anti-Malware Scanning
  5. Click on “Clean Now”.

    GridinSoft Anti-Malware Scan Result

About the author

Brendan Smith

Cybersecurity analyst covering malware families, suspicious files, and detection alerts. Brendan focuses on clear explanations of what a warning means, when it may be a false positive, and which cleanup steps are appropriate.

2 Comments

  • I had been affected by the Kitz ransomware and found out that the ID is online. How to decrypt for Kitz with Online Id?

    • Try to use PhotoRec (it is a free tool) to recover encrypted files. If it did not help to recover encrypted files, then you just have to wait for the moment when decryption becomes possible. Follow the news on our site or telegram.

Leave a Comment