A ransomware infection known as KRider has been spotted in the wild by malware researchers. The virus uses an AES encryption algorithm to encrypt the files on the infected computer. Unlike other ransomware infection, this virus does not drop a ransom note with demands to pay a hefty ransom fee to get your files back. In case you have become a victim of this ransomware infection we advise you to read this article thoroughly.
|Short Description||The malware encrypts users files using a strong AES encryption algorithm, making direct decryption possible only via a unique decryption key.|
|Symptoms||The user may witness ransom notes and “instructions” linking to a web page and a decryptor. Changed file names and the file-extension .kr3 has been used.|
|Detection Tool|| See If Your System Has Been Affected by malware |
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|User Experience||Join our forum to Discuss .kr3 Ransomware.|
|Data Recovery Tool||Windows 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.|
How Does .kr3 File Virus Infect
For the infection process to be successful, this ransomware virus may use e-mail spam messages. Those messages usually contain a convincing statement in them that the attachment to the e-mail is of great importance and should be opened as soon as possible, just like the example image below displays:
Besides this, there are other methods by which this virus can spread. Some of them include fake installers downloaded from shady websites, fake patches downloaded from torrent websites and others.
More Information about .kr3 Ransomware
As soon as the user opens the malicious file, the infection with this virus takes place. It drops two executables on the compromised computer, one named KRider.exe and the other is .exe file with random symbols. The files may be dropped on multiple important Windows folders:
This virus may also modify crucial for Windows settings by adding registry values in the Windows Registry Editor. The usually targeted registry sub-keys are the following:
Then the .kr3 virus may also modify some of the important files of Windows with the one and only purpose of remaining undetected on the computer while performing it’s primary purpose – encryption.
The Encryption Process of .kr3 File Virus
The KRider ransomware is a very serious threat when it comes to encryption. The virus takes advantage of an encryption algorithm, known as Advanced Encryption Standard or Rijndael. The cipher is 256 bits in strength and it is very difficult to decode files encoded by it. For the encryption .kr3 ransomware may target Microsoft Office files, OpenOffice files, PDF files, text documents, database files. But the virus may also be preconfigured to encrypt the standard file types that are used often:
→ “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”Source:fileinfo.com
The files are encoded by having bytes of them replaced with code from the cipher which makes them no longer able to be opened. After this a unique key is generated and stored on the infected computer. The files have the .kr3 file extension and may appear like the following:
After encryption, the .kr3 ransomware may also perform other activities to further eliminate any option of data recovery. One of those is to attempt and delete the shadow volume copies of the infected computer via executing the privileged vssadmin command in Windows:
What is interesting in this particular case is that the .kr3 ransomware infection does not drop any ransom note, suggesting the virus may still be in development. Whatever the case might be, it is not advisable in any circumstance to look for a way of payment, because it is no guarantee you will get the files back. Instead, removal is highly recommended after backing up the encrypted files.
Remove .kr3 Ransomware Infection and Restore Encrypted Files
For the removal of this ransomware virus, you can go ahead and follow the removal instructions below. They are carefully designed to help you to be rid of this ransomware infection methodologically. In case you lack the experience in performing manual removal, experts often advise users to perform an automatic removal by downloading and installing an advanced anti-malware program.
After already removed the virus files from your computer, our recommendations are to focus on trying several alternative tools for data recovery, decryption and file restoring. They are outlined in step “2. Restore files encrypted by .kr3 ransomware.”
- Guide 1: How to Remove .kr3 Ransomware from Windows.
- Guide 2: Get rid of .kr3 Ransomware from Mac OS X.
- Guide 3: Remove .kr3 Ransomware from Google Chrome.
- Guide 4: Erase .kr3 Ransomware from Mozilla Firefox.
- Guide 5: Uninstall .kr3 Ransomware from Microsoft Edge.
- Guide 6: Remove .kr3 Ransomware from Safari.
- Guide 7: Eliminate .kr3 Ransomware from Internet Explorer.
How to Remove .kr3 Ransomware from Windows.
Step 1: Boot Your PC In Safe Mode to isolate and remove .kr3 Ransomware
Step 2: Uninstall .kr3 Ransomware 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.
Step 3: Clean any registries, created by .kr3 Ransomware on your computer.
The usually targeted registries of Windows machines are the following:
You can access them by opening the Windows registry editor and deleting any values, created by .kr3 Ransomware there. This can happen by following the steps underneath:
Get rid of .kr3 Ransomware from Mac OS X.
Step 1: Uninstall .kr3 Ransomware and remove related files and objects
1. Hit the ⇧+⌘+U keys to open Utilities. Another way is to click on “Go” and then click “Utilities”, like the image below shows:
- 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 .kr3 Ransomware 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:
You can repeat the same procedure with the following other Library directories:
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.
Remove .kr3 Ransomware from Google Chrome.
Step 1: Start Google Chrome and open the drop menu
Step 2: Move the cursor over "Tools" and then from the extended menu choose "Extensions"
Step 3: From the opened "Extensions" menu locate the unwanted extension and click on its "Remove" button.
Step 4: After the extension is removed, restart Google Chrome by closing it from the red "X" button at the top right corner and start it again.
Erase .kr3 Ransomware from Mozilla Firefox.
Step 1: Start Mozilla Firefox. Open the menu window
Step 2: Select the "Add-ons" icon from the menu.
Step 3: Select the unwanted extension and click "Remove"
Step 4: After the extension is removed, restart Mozilla Firefox by closing it from the red "X" button at the top right corner and start it again.
Uninstall .kr3 Ransomware from Microsoft Edge.
Step 1: Start Edge browser.
Step 2: Open the drop menu by clicking on the icon at the top right corner.
Step 3: From the drop menu select "Extensions".
Step 4: Choose the suspected malicious extension you want to remove and then click on the gear icon.
Step 5: Remove the malicious extension by scrolling down and then clicking on Uninstall.
Remove .kr3 Ransomware from Safari.
Step 1: Start the Safari app.
Step 2: After hovering your mouse cursor to the top of the screen, click on the Safari text to open its drop down menu.
Step 3: From the menu, click on "Preferences".
Step 4: After that, select the 'Extensions' Tab.
Step 5: Click once on the extension you want to remove.
Step 6: Click 'Uninstall'.
A pop-up window will appear asking for confirmation to uninstall the extension. Select 'Uninstall' again, and the .kr3 Ransomware will be removed.
Eliminate .kr3 Ransomware from Internet Explorer.
Step 1: Start Internet Explorer.
Step 2: Click on the gear icon labeled 'Tools' to open the drop menu and select 'Manage Add-ons'
Step 3: In the 'Manage Add-ons' window.
Step 4: Select the extension you want to remove and then click 'Disable'. A pop-up window will appear to inform you that you are about to disable the selected extension, and some more add-ons might be disabled as well. Leave all the boxes checked, and click 'Disable'.
Step 5: After the unwanted extension has been removed, restart Internet Explorer by closing it from the red 'X' button located at the top right corner and start it again.