.kroput Files Ransomware Virus – How to Remove It - How to, Technology and PC Security Forum | SensorsTechForum.com
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.kroput Files Ransomware Virus – How to Remove It

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This article is made with the primary goal in mind to explain to you what is the .kroput file extension virus and how you can remove the Kroput ransomware from your computer, plus how you can try and get .kroput files to work once again.

A new ransomware virus, using the .kroput file extension was recently detected to infect computers silently and then extort victims to pay ransom if they want to use their files once again. The .kroput files virus, also known as Kroput ransomware is the type of virus which uses advanced encryption to hold your files hostage until a ransom has been paid to get them to work. If your computer has been affected by the .kroput files virus, we would strongly recommend that you read this article as it contains more information on the .kroput file ransomware and also aims to show you how you can remove it and try getting your files to work again.

Threat Summary

Name.kroput Files Virus
TypeRansomware, Cryptovirus
Short DescriptionIt’s main goal is to scramble the files on your computer and make it so that they no longer able to be opened.
SymptomsUses the .kroput file extension which is added to the encrypted files. May drop a ransom note on the computers of victims.
Distribution MethodSpam Emails, Email Attachments, Executable files
Detection Tool See If Your System Has Been Affected by .kroput Files Virus

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Malware Removal Tool

User ExperienceJoin Our Forum to Discuss .kroput 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.

.kroput Files Virus – How Does It Infect?

Probably one of the main methods that is used for infection with the .kroput ransomware is believed to be via malicious e-mail spam messages. These e-mails often tend to get users to download and start a file that is attached to the e-mails themselves. These files are often disguised as important documents of some sort, such as:

  • An invoice for a purchase.
  • A document for a cancelled order.
  • A file that is a report from a closed bank account.
  • Some type of debt-related document.

The files that are usually used may either be JavaScript (.js) files or Microsoft Word and Adobe Reader documents with malicious macros embedded in them. Either way, the files are often uploaded in an archive and once the user downloads, extracts the file and runs it, infection may immediately commence.

Another method via which infection can commence may be by uploading the virus files of the malware on several different websites that are compromised as well as suspicious sites. On those web locations, crooks may use various different types of methods to disguise the files are legitimate ones. Often criminals use the following files to trick victims into downloading and getting infected with .kroput files virus:

  • Fake installers.
  • Fake cracks.
  • Fraudulent activators for Windows.
  • Fake portable versions of programs.

.kroput File Ransomware – What Does It Do

Once an infection occurs with the .kroput files virus, the ransomware may begin to create files on your computer. The files may often reside in the following Windows directories under different, often random names:

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

The main malicious file of .kroput files ransomware was detected to have the following identification information:

→ SHA-256:114ccacb7ca57c01f3540611fdf49e68416544da8d8077f5896434a4b71b01dd
Name:updatewin.exe
Size:277.5 KB

In addition to it, since .kroput is a variant of STOP ransomware, the ransom note _readme.txt is also dropped on victimised machines:

ATTENTION!

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:
[email protected]
Reserve e-mail address to contact us:
[email protected]
Your personal ID:
[redacted 43 alphanumeric chars]

In addition to the malicious files created by this ransomware, the .kroput virus may also perform other virus activities as well:

  • Create mutexes on the compromised machine.
  • Check to see if the virus is dropped on a virtual drive or is running on actual PC.
  • Take screenshots on the compromised computer.
  • Log the keystrokes you type.
  • Obtain information about your location(IP) and language.

Furthermore, the .kroput files ransomware may also perform other unwanted activities on the computers that have been compromised by it. One of them is to allegedly create a randomly named registry string on the victimised machines which has data embeded in it that may automatically run the virus files of .kroput ransomware so that the virus runs automatically each time you boot Windows. The keys that are usually used for this purpose are the Run and RunOnce sub-keys in Windows. They have the following location:

→ 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

In addition to this, the .kroput file ransomware could also perform series of other malicious activities on the computers that are infected by it and among them may be to delete the backed up files and shadow copy files on the computers, compromised by it. The outcome of this is for the user to not be able to restore files via Windows Recovery services. To reach its goal, the .kroput files virus may run the following commands 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
delete shadows [all | volume | oldest | set | id | exposed { | }]

.kroput Files Virus – Encryption

To encrypt files on the computers that have been infected, .kroput files virus may begin to scan for them, based on their file extensions. The following types of files may be encrypted by the .kroput files virus:

→ “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”

After the encryption process is complete, the files have part of their file data replaced with data from the encryption algorithm and they have the .kroput file extension added to them:

Remove .kroput Files Virus and Try Restoring Data

Before proceeding with the removal of .kroput files ransomware, we strongly suggest that you do a fresh backup of your files, just in case.

To remove the files of .kroput ransomware, you can follow the removal steps underneath and use the instructions in them in combination with the information in this article. In addition to this, you can also remove the .kroput ransomware automatically by using an advanced anti-malware program. Such software will save you hours of manual removal time, since it will scan for and remove all malware and unwanted files, belonging to .kroput ransomware in a matter of minutes time.

If you want to try and get files, encrypted by the .kroput file ransomware to work again, we suggest that you see the “Try to restore” step underneath. It contains methods that aim to show you how you can try to go around direct decryption (which is impossible unless you pay ransom) and restore at least some of your files, even though they are not 100% guaranteed to work.

Ventsislav Krastev

Ventsislav has been covering the latest malware, software and newest tech developments at SensorsTechForum for 3 years now. He started out as a network administrator. Having graduated Marketing as well, Ventsislav also has passion for discovery of new shifts and innovations in cybersecurity that become game changers. After studying Value Chain Management and then Network Administration, he found his passion within cybersecrurity and is a strong believer in basic education of every user towards online safety.

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