THREAT REMOVAL

.kropun Files Virus – How to Remove It

This article has been created to help explain what is the .kropun file extension variant of Stop ransomware and how you can remove it plus try to get your files back.

STOP ransomware keeps surprising users with more and more versions. One such version is the one, using the .kropun file suffix. The .kropun STOP virus aims to make the files on your computer not readable and you cannot open them. The malware is a variant of the STOP Ransomware family of viruses – a nasty malicious program that does this because the people behind it want you to pay ransom in the form of BitCoins, which is highly inadvisable. If your computer has been infected by the .kropun version of STOP ransomware, we recommend that you read this article thoroughly.

Threat Summary

Name.kropun STOP Virus
TypeRansomware, Cryptovirus
Short DescriptionCreated to encrypt valuable files stored on compromised computers and afterward urges victims to pay ransom.
SymptomsFiles are encrypted and renamed with the .kropun file extension. A ransom note file called _readme.txt is dropped and loaded on screen to extort ransom payment.
Distribution MethodSpam Emails, Email Attachments
Detection Tool See If Your System Has Been Affected by malware

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Malware Removal Tool

User ExperienceJoin Our Forum to Discuss .kropun STOP 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.

.kropun Stop Ransomware – Distribution

The .kropun variant of STOP ransomware may infect a computer via more than one ways. For starters, the virus may comrpomise machines via a malicious web link, whose primary purpose is to inject an automated JavaScript code, that may download the payload of this virus onto the compromised computers by it.

The .kropun ransomware may use other means of distribution as well, such as spread its infection file as an e-mail attachment over the mail. Such e-mails aim to convince users to download and run the attachment and they often portray it as a “must see” document that is very important. Often, the subjects of the e-mail are similar to the examples below:

  • “Your payment invoice.”
  • “Your order has been revoked.”
  • “Your bank receipt.”
  • “Your PayPal invoice.”
  • “Problem with your visa/mastercard.”

The attachment themselves may either be a .js or other type of file in an archive or they may be a .docx or .pdf file with embedded malcious macros. The latter two trigger infection when you enable their content.

Another mean of distribution used by the .kropun files virus is to come to your computer as a result of being directly uploaded on a suspicious site, where they might seem as If they are exactly what you are trying to download, like:

  • Crack for a program.
  • Keygen.
  • Patch.
  • Installer.
  • Portable program.
  • License activator for Windows or Microsoft Office.

.kropun STOP Ransomware – Activity

Once an infection with the .kropun version of STOP ransomware has occurred, the virus may drop its ransom note file on several Windows directories on the infected computer:

  • %AppData%
  • %Local%
  • %Temp%
  • %Roaming%
  • %ProgramData%
  • %LocalLow%

Shortly after this has been done, the ransomware virus may start to create multiple different types of files and those include its ransom note, that has the following message to victims:

———————————————- ALL YOUR FILES ARE ENCRYPTED ———————————————–

Don’t worry, you can return all your files!
All your files documents, photos, databases 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 do we give to you?
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
Don’t try to use third-party decrypt tools because it will destroy your files.
Discount 50% available if you contact us first 72 hours.
—————————————————————————————————————————
To get this software you need write on our e-mail:
blower@firemail.cc
Reserve e-mail address to contact us:
blower@firemail.cc
Your personal ID:
[redacted 43 alphanumeric chars]

In addition to the ransom note, the .kropun Virus may also edit the following reigstry sub-keys by adding value strings in them which open files automatically when you start Windows:

→ HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\RunOnce
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\RunOnce

Furthermore, the .kropun ransomware may also perform other actions, like delete the shadow copy files from the victim PC as well as disable Windows Recovery. These actions are done by the .kropun ransomware so that you cannot recover your files with the help of Windows backup services. To do them, the .kropun Ransomware may execute a script that enters commands similar to the ones below as an administrator in Windows Command Prompt:

→ sc stop VVS
sc stop wscsvc
sc stop WinDefend
sc stop wuauserv
sc stop BITS
sc stop ERSvc
sc stop WerSvc
cmd.exe /C bcdedit /set {default} recoveryenabled No
cmd.exe /C bcdedit /set {default} bootstatuspolicy ignoreallfailures
C:\Windows\System32\cmd.exe” /C vssadmin.exe Delete Shadows /All /Quiet

From the latest information which we have received, the virus has been listed as a RaaS (ransomware-as-a-service), which means that crooks pay the official ransomware developers to spread the virus in their own variant and hence infect computer and what the “investor” gets is the profit from the ransom, while the crooks take percentage of it for developing and managing the infection and ransom services.

.kropun Ransomware –
Encryption Process

To encrypt files, .kropun Ransomware may use an AES-256 encryption cipher. This algorithm is known as Advanced EncryptionStandard and is usually used by the government agenices to encode sensitive information. The cipher generates assymetric key which corresponds to a master key that is only known by the crooks. To encrypt files, the .kropun ransomware may first check your computer for the file types that should be encrypted. These files are usually documents, videos, images, videos, archives, music files and other often used files that may be important for you. The ransomware scans them based on their file extensions, for example it may have a pre-configured list of extensions to scan for, like the one below:

→ “PNG .PSD .PSPIMAGE .TGA .THM .TIF .TIFF .YUV .AI .EPS .PS .SVG .INDD .PCT .PDF .XLR .XLS .XLSX .ACCDB .DB .DBF .MDB .PDB .SQL .APK .APP .BAT .CGI .COM .EXE .GADGET .JAR .PIF .WSF .DEM .GAM .NES .ROM .SAV CAD Files .DWG .DXF GIS Files .GPX .KML .KMZ .ASP .ASPX .CER .CFM .CSR .CSS .HTM .HTML .JS .JSP .PHP .RSS .XHTML. DOC .DOCX .LOG .MSG .ODT .PAGES .RTF .TEX .TXT .WPD .WPS .CSV .DAT .GED .KEY .KEYCHAIN .PPS .PPT .PPTX ..INI .PRF Encoded Files .HQX .MIM .UUE .7Z .CBR .DEB .GZ .PKG .RAR .RPM .SITX .TAR.GZ .ZIP .ZIPX .BIN .CUE .DMG .ISO .MDF .TOAST .VCD SDF .TAR .TAX2014 .TAX2015 .VCF .XML Audio Files .AIF .IFF .M3U .M4A .MID .MP3 .MPA .WAV .WMA Video Files .3G2 .3GP .ASF .AVI .FLV .M4V .MOV .MP4 .MPG .RM .SRT .SWF .VOB .WMV 3D .3DM .3DS .MAX .OBJ R.BMP .DDS .GIF .JPG ..CRX .PLUGIN .FNT .FON .OTF .TTF .CAB .CPL .CUR .DESKTHEMEPACK .DLL .DMP .DRV .ICNS .ICO .LNK .SYS .CFG”

When the .kropun ransomware manages to encrypt the files on the computers it has already infected, the virus may immediately set its .kropun extension to them and the files start to appear like the following:

Remove .kropun Files Virus and Attempt to Restore Data

Before actually removing the .kropun variant of STOP ransomware, we strongly recommend that you backup your files. This can happen safely via creating a Windows image or via copying your hard drive data to another drive.

To remove .kropun files ransomware, we strongly recommend that you follow the removal instructions posted underneath. They are made to help you delete the virus files of .kropun ransomware either manually or automatically. If the first two manual steps do not seem to work or you feel unconfident in removing this ransomware manually, then we reccomend that you remove it automatically by downloading an advanced anti-malware software to perform a scan and detect and eliminate all .kropun virus files for you.

If you want to try and get your data back, we strongly suggest that you see the alternative steps in the “Try to restore” paragraph underneath. They may not be 100% effective, but with their help, you might just be able to get at least some of your data back

Avatar

Ventsislav Krastev

Ventsislav is a cybersecurity expert at SensorsTechForum since 2015. He has been researching, covering, helping victims with the latest malware infections plus testing and reviewing software and the newest tech developments. Having graduated Marketing as well, Ventsislav also has passion for learning new shifts and innovations in cybersecurity that become game changers. After studying Value Chain Management, Network Administration and Computer Administration of System Applications, he found his true calling within the cybersecrurity industry and is a strong believer in the education of every user towards online safety and security.

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Attention! SensorsTechForum strongly recommends that all malware victims should look for assistance only by reputable sources. Many guides out there claim to offer free recovery and decryption for files encrypted by ransomware viruses. Be advised that some of them may only be after your money.

As a site that has been dedicated to providing free removal instructions for ransomware and malware since 2014, SensorsTechForum’s recommendation is to only pay attention to trustworthy sources.

How to recognize trustworthy sources:

  • Always check "About Us" web page.
  • Profile of the content creator.
  • Make sure that real people are behind the site and not fake names and profiles.
  • Verify Facebook, LinkedIn and Twitter personal profiles.


OFFER

REMOVE IT NOW (PC)
with Anti-Malware
We recommend you to download SpyHunter and run free scan to remove all virus files on your PC. This saves you hours of time and effort compared to doing the removal yourself.
SpyHunter 5 free remover allows you, subject to a 48-hour waiting period, one remediation and removal for results found. Read EULA and Privacy Policy


Windows Mac OS X

How to Remove .kropun STOP Virus from Windows.


Step 1: Boot Your PC In Safe Mode to isolate and remove .kropun STOP Virus

OFFER

Manual Removal Usually Takes Time and You Risk Damaging Your Files If Not Careful!
We Recommend To Scan Your PC with SpyHunter

Keep in mind, that SpyHunter’s scanner is only for malware detection. If SpyHunter detects malware on your PC, you will need to purchase SpyHunter's malware removal tool to remove the malware threats. Read our SpyHunter 5 review. Click on the corresponding links to check SpyHunter's EULA, Privacy Policy and Threat Assessment Criteria

1. Hold Windows key() + R


2. The "Run" Window will appear. In it, type "msconfig" and click OK.


3. Go to the "Boot" tab. There select "Safe Boot" and then click "Apply" and "OK".
Tip: Make sure to reverse those changes by unticking Safe Boot after that, because your system will always boot in Safe Boot from now on.


4. When prompted, click on "Restart" to go into Safe Mode.


5. You can recognise Safe Mode by the words written on the corners of your screen.


Step 2: Uninstall .kropun STOP Virus and related software from Windows

Here is a method in few easy steps that should be able to uninstall most programs. No matter if you are using Windows 10, 8, 7, Vista or XP, those steps will get the job done. Dragging the program or its folder to the recycle bin can be a very bad decision. If you do that, bits and pieces of the program are left behind, and that can lead to unstable work of your PC, errors with the file type associations and other unpleasant activities. The proper way to get a program off your computer is to Uninstall it. To do that:


1. Hold the Windows Logo Button and "R" on your keyboard. A Pop-up window will appear.


2. In the field type in "appwiz.cpl" and press ENTER.


3. This will open a window with all the programs installed on the PC. Select the program that you want to remove, and press "Uninstall"
Follow the instructions above and you will successfully uninstall most programs.


Step 3: Clean any registries, created by .kropun STOP Virus on your computer.

The usually targeted registries of Windows machines are the following:

  • HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run
  • HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
  • HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\RunOnce
  • HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\RunOnce

You can access them by opening the Windows registry editor and deleting any values, created by .kropun STOP Virus there. This can happen by following the steps underneath:

1. Open the Run Window again, type "regedit" and click OK.


2. When you open it, you can freely navigate to the Run and RunOnce keys, whose locations are shown above.


3. You can remove the value of the virus by right-clicking on it and removing it.
Tip: To find a virus-created value, you can right-click on it and click "Modify" to see which file it is set to run. If this is the virus file location, remove the value.

IMPORTANT!
Before starting "Step 4", please boot back into Normal mode, in case you are currently in Safe Mode.
This will enable you to install and use SpyHunter 5 successfully.

Step 4: Scan for .kropun STOP Virus with SpyHunter Anti-Malware Tool

1. Click on the "Download" button to proceed to SpyHunter's download page.


It is recommended to run a scan before purchasing the full version of the software to make sure that the current version of the malware can be detected by SpyHunter. Click on the corresponding links to check SpyHunter's EULA, Privacy Policy and Threat Assessment Criteria.


2. After you have installed SpyHunter, wait for it to update automatically.

SpyHunter5-update-2018


3. After the update process has finished, click on the 'Malware/PC Scan' tab. A new window will appear. Click on 'Start Scan'.

SpyHunter5-Free-Scan-2018


4. After SpyHunter has finished scanning your PC for any files of the associated threat and found them, you can try to get them removed automatically and permanently by clicking on the 'Next' button.

SpyHunter-5-Free-Scan-Next-2018

If any threats have been removed, it is highly recommended to restart your PC.

Step 5 (Optional): Try to Restore Files Encrypted by .kropun STOP Virus.

Ransomware infections and .kropun STOP Virus aim to encrypt your files using an encryption algorithm which may be very difficult to decrypt. This is why we have suggested a data recovery method that may help you go around direct decryption and try to restore your files. Bear in mind that this method may not be 100% effective but may also help you a little or a lot in different situations.

1. Download the reccomended Data Recovery software by clicking on the link underneath:

Simply click on the link and on the website menus on top, choose Data Recovery - Data Recovery Wizard for Windows or Mac (depending on your OS), and then download and run the tool.


Windows Mac OS X

Get rid of .kropun STOP Virus from Mac OS X.


Step 1: Uninstall .kropun STOP Virus and remove related files and objects

OFFER
Manual Removal Usually Takes Time and You Risk Damaging Your Files If Not Careful!
We Recommend To Scan Your Mac with SpyHunter for Mac
Keep in mind, that SpyHunter for Mac needs to purchased to remove the malware threats. Click on the corresponding links to check SpyHunter’s EULA and Privacy Policy


1. Hit the ⇧+⌘+U keys to open Utilities. Another way is to click on “Go” and then click “Utilities”, like the image below shows:


2. Find Activity Monitor and double-click it:


3. In the Activity Monitor look for any suspicious processes, belonging or related to .kropun STOP Virus:

Tip: To quit a process completely, choose the “Force Quit” option.


4. Click on the "Go" button again, but this time select Applications. Another way is with the ⇧+⌘+A buttons.


5. In the Applications menu, look for any suspicious app or an app with a name, similar or identical to .kropun STOP Virus. If you find it, right-click on the app and select “Move to Trash”.


6: Select Accounts, after which click on the Login Items preference. Your Mac will then show you a list of items that start automatically when you log in. Look for any suspicious apps identical or similar to .kropun STOP Virus. Check the app you want to stop from running automatically and then select on the Minus (“-“) icon to hide it.


7: Remove any left-over files that might be related to this threat manually by following the sub-steps below:

  • Go to Finder.
  • In the search bar type the name of the app that you want to remove.
  • Above the search bar change the two drop down menus to “System Files” and “Are Included” so that you can see all of the files associated with the application you want to remove. Bear in mind that some of the files may not be related to the app so be very careful which files you delete.
  • If all of the files are related, hold the ⌘+A buttons to select them and then drive them to “Trash”.

In case you cannot remove .kropun STOP Virus via Step 1 above:

In case you cannot find the virus files and objects in your Applications or other places we have shown above, you can manually look for them in the Libraries of your Mac. But before doing this, please read the disclaimer below:

Disclaimer! If you are about to tamper with Library files on Mac, be sure to know the name of the virus file, because if you delete the wrong file, it may cause irreversible damage to your MacOS. Continue on your own responsibility!

1: Click on "Go" and Then "Go to Folder" as shown underneath:

2: Type in "/Library/LauchAgents/" and click Ok:

3: Delete all of the virus files that have similar or the same name as .kropun STOP Virus. If you believe there is no such file, do not delete anything.

You can repeat the same procedure with the following other Library directories:

→ ~/Library/LaunchAgents
/Library/LaunchDaemons

Tip: ~ is there on purpose, because it leads to more LaunchAgents.


Step 2: Scan for and remove malware from your Mac

When you are facing problems on your Mac as a result of unwanted scripts, programs and malware, the recommended way of eliminating the threat is by using an anti-malware program. Combo Cleaner offers advanced security features along with other modules that will improve your Mac’s security and protect it in the future.


Step 3 (Optional): Try to Restore Files Encrypted by .kropun STOP Virus.

Ransomware infections and .kropun STOP Virus aim to encrypt your files using an encryption algorithm which may be very difficult to decrypt. This is why we have suggested a data recovery method that may help you go around direct decryption and try to restore your files. Bear in mind that this method may not be 100% effective but may also help you a little or a lot in different situations.

1. Download the reccomended Data Recovery software by clicking on the link underneath:

Simply click on the link and on the website menus on top, choose Data Recovery - Data Recovery Wizard for Windows or Mac (depending on your OS), and then download and run the tool.


.kropun STOP Virus FAQ

What is .kropun STOP Virus ransomware and how does it work?

.kropun STOP Virus is a ransomware infection - the malicious software that enters your computer silently and blocks either access to the computer itself or encrypt your files.

Many ransomware viruses use sophisticated encryption algorithm how to make your files inaccessible. The goal of ransomware infections is to demand that you pay a ransom payment to get access to your files back.

How does .kropun STOP Virus ransomware infect my computer?

Via several ways..kropun STOP Virus Ransomware infects computers by being sent via phishing e-mails, containing virus attachment.

This attachment is usually masked as an important document, like an invoice, bank document or even a plane ticket and it looks very convincing to users.

After you download and execute this attachment, a drive-by download occurs and your computer is infected with the ransomware virus.

Another way, you may become a victim of .kropun STOP Virus is if you download a fake installer, crack or patch from a low reputation website or if you click on a virus link. Many users report getting a ransomware infection by downloading torrents.

How to open ..kropun STOP Virus files?

You can't. At this point the ..kropun STOP Virus files are encrypted. You can only open them once they are decrypted.

Decryptor did not decrypt my data. What now?

Do not panic and backup the files. If a decryptor did not decrypt your ..kropun STOP Virus files successfully, then do not despair, because this virus is still new.

One way to restore files, encrypted by .kropun STOP Virus ransomware is to use a decryptor for it. But since it's a new virus, advised that the decryption keys for it may not be out yet and available to the public. We will update this article and keep you posted as soon as this decryptor is released.

How Do I restore "..kropun STOP Virus" files (Other Methods)?

Yes, sometimes files can be restored. We have suggested several file recovery methods that could work if you want to restore ..kropun STOP Virus files.

These methods are in no way 100% guarantee that you will be able to get your files back. But if you have a backup, your chances of success are much greater.

How do I get rid of .kropun STOP Virus ransomware virus?

The safest way and the most efficient one for the removal of this ransomware infection is the use a professional anti malware software. It will scan for and locate .kropun STOP Virus ransomware and then remove it without causing any additional harm to your important ..kropun STOP Virus files.

Also, keep in mind that viruses like .kropun STOP Virus ransomware also install Trojans and keyloggers that can steal your passwords and accounts. Scanning your computer with an anti-malware software will make sure that all of these virus components are removed and your computer is protected in the future.

What to Do If nothing works?

There is still a lot you can do. If none of the above methods seem to work for you, then try these methods:

  • Try to find a safe computer from where you can can login on your own line accounts like One Drive, iDrive, Google Drive and so on.
  • Try to contact your friends, relatives and other people so that they can check if they have some of your important photos or documents just in case you sent them.
  • Also, check if some of the files that were encrypted it can be re-downloaded from the web.
  • Another clever way to get back some of your files is to find another old computer, a flash drive or even a CD or a DVD where you may have saved your older documents. You might be surprised what will turn up.
  • You can also go to your email account to check if you can send any attachments to other people. Usually what is sent the email is saved on your account and you can re-download it. But most importantly, make sure that this is done from a safe computer and make sure to remove the virus first.

More tips you can find on our forums, where you can also asks any questions about your ransomware problem.

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