Kozy.Jozy ransomware virus. How to remove? (Uninstall guide)

removal by Olivia Morelli - - | Type: Ransomware
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Kozy.Jozy ransomware is a malicious computer threat that you should be aware of

Kozy.Jozy virus is a severe computer threat, and you should do everything to stop it from entering your PC. It belongs to crypto-ransomware family, which means that it is a file-encrypting virus. The way it works is rather simple. When the user executes Kozy.Jozy malware, it encrypts all data that has the following file extensions:

.cd, .ldf, .mdf, .odt, .ods, .odb, .odg, .bmp, .png, .max, .dbf, .epf, .1cd, .md, .pdf, .ppt, .doc, .arj, .tar, .7z, .rar, .xls, .zip, .tif, .jpg, .cdr, .psd, .jpeg, .docx, .xlsx, .pptx, .accdb, .mdb, .rtf.

Encrypted data becomes useless as the user cannot open, use, or manipulate it in any way. The worst thing is that this virus runs the encryption process in the background without notifying the computer user, and the only thing that can seem suspicious is that the computer runs a bit slower than usually. As a result, the user does not have a change to interrupt or stop this virus anyhow. Kozy.Jozy ransomware adds unique file extensions to encrypted files, too; here is an example of it – .31392E30362E32303136_(random number from 0 to 20)_LSBJ1. It is worth noting that victims have also reported similar symbol combinations, so it might be that authors of this malware sell its code in dark web forums. Once the virus encrypts all files, and when there is nothing more to corrupt, it changes desktop wallpaper with the following image:
Kozy.Jozy ransomware encrypts files and asks to pay up

The message is written in the Russian language, and it claims that files have been encrypted with the RSA-2048 cipher. It is one of the most complicated ciphers to crack, so it means that it might be impossible to decrypt your data anytime soon. Besides, the virus deletes Volume Shadow Copies, so forget about them – this virus takes all necessary actions to frighten the user and make him pay the ransom. The ransom note says that the victim needs to get in touch with ransomware authors by sending a letter to kozy.jozy@yahoo.com email. The frauds will ask you to transfer them a considerable amount of money via Bitcoin payment system. Sadly, this might not help you to get your files back; therefore, we recommend you to remove Kozy.Jozy ransomware from your PC as soon as possible. Make sure you use a powerful anti-malware program for that, for example, Reimage.

How does this virus spread?

The vast of ransomware threats spread using same techniques. It seems that cyber criminals are not so creative at this point; typically, they send these viruses to victims via emails. For instance, they try to mask an executive file by adding .txt or .doc to its filename, for example, invoice.jpg.exe. We advise you not to open an email if you do not know the sender of it.

If you had accidentally installed a malicious Trojan into your computer a while ago, it could also be a reason why Kozy.Jozy got into your computer. Trojans can silently download malicious files to a compromised computer and execute them after some time. If you do not want your data to be encrypted, you should take particular security measures – secure your computer with an anti-malware software, backup your files, update your software, and avoid visiting untrustworthy websites and downloading content from them.

How to remove Kozy.Jozy?

We do not suggest removing Kozy.Jozy virus manually. It is not a simple program, but a malicious computer threat, which contaminates the computer system by placing malicious files everywhere. Unless you are an advanced programming expert, you might not be able to identify all these files. Remember that even remains of a virus pose a threat to computer and can cause various issues later. Therefore, it is advisable to use an anti-malware software to delete this virus from your computer. We recommend using Reimage to complete Kozy.Jozy removal.

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What to do if failed?
If you failed to remove infection using Reimage, submit a question to our support team and provide as much details as possible.
Reimage is recommended to uninstall Kozy.Jozy ransomware virus. Free scanner allows you to check whether your PC is infected or not. If you need to remove malware, you have to purchase the licensed version of Reimage malware removal tool.

More information about this program can be found in Reimage review.

More information about this program can be found in Reimage review.

Manual Kozy.Jozy virus Removal Guide:

Remove Kozy.Jozy using Safe Mode with Networking

Reimage is a tool to detect malware.
You need to purchase Full version to remove infections.
More information about Reimage.

  • Step 1: Reboot your computer to Safe Mode with Networking

    Windows 7 / Vista / XP
    1. Click Start Shutdown Restart OK.
    2. When your computer becomes active, start pressing F8 multiple times until you see the Advanced Boot Options window.
    3. Select Safe Mode with Networking from the list Select 'Safe Mode with Networking'

    Windows 10 / Windows 8
    1. Press the Power button at the Windows login screen. Now press and hold Shift, which is on your keyboard, and click Restart..
    2. Now select Troubleshoot Advanced options Startup Settings and finally press Restart.
    3. Once your computer becomes active, select Enable Safe Mode with Networking in Startup Settings window. Select 'Enable Safe Mode with Networking'
  • Step 2: Remove Kozy.Jozy

    Log in to your infected account and start the browser. Download Reimage or other legitimate anti-spyware program. Update it before a full system scan and remove malicious files that belong to your ransomware and complete Kozy.Jozy removal.

If your ransomware is blocking Safe Mode with Networking, try further method.

Remove Kozy.Jozy using System Restore

Reimage is a tool to detect malware.
You need to purchase Full version to remove infections.
More information about Reimage.

  • Step 1: Reboot your computer to Safe Mode with Command Prompt

    Windows 7 / Vista / XP
    1. Click Start Shutdown Restart OK.
    2. When your computer becomes active, start pressing F8 multiple times until you see the Advanced Boot Options window.
    3. Select Command Prompt from the list Select 'Safe Mode with Command Prompt'

    Windows 10 / Windows 8
    1. Press the Power button at the Windows login screen. Now press and hold Shift, which is on your keyboard, and click Restart..
    2. Now select Troubleshoot Advanced options Startup Settings and finally press Restart.
    3. Once your computer becomes active, select Enable Safe Mode with Command Prompt in Startup Settings window. Select 'Enable Safe Mode with Command Prompt'
  • Step 2: Restore your system files and settings
    1. Once the Command Prompt window shows up, enter cd restore and click Enter. Enter 'cd restore' without quotes and press 'Enter'
    2. Now type rstrui.exe and press Enter again.. Enter 'rstrui.exe' without quotes and press 'Enter'
    3. When a new window shows up, click Next and select your restore point that is prior the infiltration of Kozy.Jozy. After doing that, click Next. When 'System Restore' window shows up, select 'Next' Select your restore point and click 'Next'
    4. Now click Yes to start system restore. Click 'Yes' and start system restore
    Once you restore your system to a previous date, download and scan your computer with Reimage and make sure that Kozy.Jozy removal is performed successfully.

Finally, you should always think about the protection of crypto-ransomwares. In order to protect your computer from Kozy.Jozy and other ransomwares, use a reputable anti-spyware, such as Reimage, Plumbytes Anti-MalwareWebroot SecureAnywhere AntiVirus or Malwarebytes Anti Malware

About the author

Olivia Morelli
Olivia Morelli - Ransomware analyst

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  • Ozzy

    my files are ruined nd I cannot open them.. can somebody say whether it is possible to decrypt them somehow or not?!

  • elder

    No! not ransomware! I was attacked! Cyber criminals hacked my computer! I didnt install this! I want my files back!

  • notsocozy

    I have removed this virus using anti-malware program but unfortunately my files are ruined…

  • hatehackers!!!

    this has affected my uncles computer! we are so mad! ransomware is the worst computer virus I have ever heard about ;(