This week, IT security specialists has received reports of yet another ransomware called .Kroput ransomware. This malicious software spreads via spam emails and malware files and appends .kroput file extension to encrypted files.
.Kroput ransomware is a variant of crypto viruses. It affects all current versions of Windows operating system like the Windows 10, Windows 8, Windows 7, Windows Vista and Windows XP. This ransomware virus uses strong encryption method to eliminate the possibility of brute force a key that will allow to decrypt encrypted photos, documents and music. Kroput ransomware encrypts almost of files, including common as:
.wmo, .ods, .dba, .mcmeta, .wp6, .ybk, .wgz, .3ds, .db0, .wp5, .ztmp, .odc, .2bp, .pem, .zip, .ai, .cfr, .sql, .js, .wpl, .mdf, .sidd, .yal, .1, .rar, .x3f, .upk, .zw, .wmd, .re4, .kdc, .odm, .tor, .das, .gho, .pkpass, .wb2, .odp, .kdb, .srf, .m4a, .bkp, .wpd, .pdd, .ptx, .3fr, .ysp, .der, .xlk, .css, .qdf, .ff, .png, .sr2, .dng, .zabw, .wp7, .indd, .dbf, .crt, .ntl, .xy3, .xld, .py, .ws, .xbplate, .xwp, .jpg, .wcf, .xdb, wallet, .webdoc, .pfx, .bc6, .xpm, .qic, .mrwref, .zip, .wpt, .ppt, .xf, .xmmap, .xlsm, .3dm, .p12, .sb, .7z, .wpd, .itm, .mef, .vdf, .pdf, .vpp_pc, .gdb, .wp4, .sid, .eps, .erf, .xmind, .mdbackup, .xml, .asset, .zif, .wbd, .r3d, .hplg, .psd, .0, .pak, .xls, .fsh, .cer, .rtf, .bc7, .wsc, .doc, .bay, .xyp, .sie, .wps, .wma, .xlsx, .t13, .wsh, .kf, .arw, .wbm, .crw, .wn, .wps, .syncdb, .iwd, .wbz, .cas, .sav, .wot, .zdc, .m3u, .y, .rgss3a, .wpa, .map, .wpe, .wire, .flv, .mp4, .lvl, .esm, .arch00, .txt, .slm, .docm, .itl, .wdb, .wbc, .zdb, .mddata, .wpw, .bik, .xls, .vcf, .raw, .rw2, .dazip, .bar, .wma, .wm, .dmp, .mpqge, .wdp, .x3d, .wav, .zi, .vfs0, .hvpl, .jpeg, .bkf, .desc, .wmv, .wsd, .wpb, .fpk, .z, .big, .vpk, .sum, .iwi, .dxg, .1st, .snx, .ltx, .psk, .xlsx, .wri, .wmv, .yml, .pef, .xlsb, .t12, .raf, .xbdoc, .xx, .z3d, .accdb, .mov, .forge, .bsa, .m2, .tax, .ibank, .hkx, .rb, .fos, .odb, .hkdb, .webp, .sis, .d3dbsp, .blob, .epk, .avi, .x, .lbf, .csv, .xdl, .layout, .wotreplay, .nrw, .w3x, .xyw, .wmf, .apk, .rwl, .xll, .icxs, .odt, .lrf, .x3f, .dwg, .wpg, .mdb, .rofl, .pptx, .pst, .pptm, .xar, .menu, .xlgc, .docx, .rim
Once a file is encrypted, its extension replaced to .kroput. Next, the ransomware virus drops a file called ‘_readme.txt’. This file contain an information on how to decrypt all encrypted files. You can see an one of the variants of the ransomnote below:
ATTENTION! Do not worry my friend, 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 buy 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 files 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-qE5J2sY0BY 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 will never restore your data without payment. Check your e-mail "Spam" folder if you do not get answer more than 6 hours. To get this software you need to write on our e-mail: firstname.lastname@example.org Reserve e-mail address to contact us: email@example.com Your personal ID:
Follow our guide below to scan for and remove .Kroput ransomware from your PC system as well as restore (decrypt) encrypted photos, documents and music for free.
Table of contents
- How to remove .Kroput ransomware
- How to decrypt .kroput files
- Use STOPDecrypter to decrypt .kroput files
- How to restore .kroput files
- How to protect your computer from .Kroput ransomware?
- To sum up
How to remove .Kroput ransomware
Manual removal does not always allow to completely remove .Kroput ransomware virus, as it is not easy to identify and remove components of virus and all malicious files from hard disk. Therefore, it is recommended that you use malicious software removal tool to completely remove .Kroput ransomware virus off your PC. Several free malicious software removal utilities are currently available that can be used against the ransomware. The optimum method would be to run Zemana Anti-malware, Malwarebytes Free and Kaspersky Virus Removal Tool.
Automatically remove .Kroput ransomware virus with Zemana Anti-malware
Zemana Anti-malware highly recommended, because it can search for security threats such .Kroput ransomware virus, adware software and other malware that most ‘classic’ antivirus applications fail to pick up on. Moreover, if you have any .Kroput ransomware removal problems which cannot be fixed by this utility automatically, then Zemana Anti-malware provides 24X7 online assistance from the highly experienced support staff.
Installing the Zemana Free is simple. First you will need to download Zemana Anti-Malware on your MS Windows Desktop by clicking on the link below.
Author: Zemana Ltd
Category: Security tools
Update: July 16, 2019
After the downloading process is complete, close all apps and windows on your computer. Open a directory in which you saved it. Double-click on the icon that’s called Zemana.AntiMalware.Setup as displayed below.
When the installation begins, you will see the “Setup wizard” that will help you setup Zemana Free on your machine.
Once installation is finished, you will see window as shown in the following example.
Now press the “Scan” button . Zemana AntiMalware (ZAM) utility will start scanning the whole computer to find out .Kroput ransomware virus related files, folders and registry keys. A system scan may take anywhere from 5 to 30 minutes, depending on your computer. While the Zemana Anti Malware tool is checking, you can see how many objects it has identified as being infected by malware.
When the system scan is finished, a list of all threats detected is produced. When you’re ready, click “Next” button.
The Zemana AntiMalware will remove .Kroput ransomware virus and other kinds of potential threats like malicious software and potentially unwanted applications and add items to the Quarantine.
Remove Kroput ransomware with MalwareBytes
Remove Kroput ransomware virus manually is difficult and often the ransomware virus is not completely removed. Therefore, we advise you to run the MalwareBytes Anti Malware (MBAM) that are fully clean your PC system. Moreover, this free program will help you to remove trojans, malware, potentially unwanted programs, toolbars and adware that your computer can be infected too.
Please go to the following link to download MalwareBytes Anti-Malware (MBAM). Save it on your Desktop.
Category: Security tools
Update: April 15, 2020
When downloading is finished, run it and follow the prompts. Once installed, the MalwareBytes AntiMalware will try to update itself and when this task is complete, click the “Scan Now” button to begin checking your PC for the Kroput ransomware virus and other security threats. This task may take quite a while, so please be patient. While the MalwareBytes Anti-Malware (MBAM) utility is scanning, you may see number of objects it has identified as being infected by malicious software. In order to remove all threats, simply click “Quarantine Selected” button.
The MalwareBytes Free is a free program that you can use to remove all detected folders, files, services, registry entries and so on. To learn more about this malicious software removal utility, we suggest you to read and follow the step-by-step guidance or the video guide below.
Run KVRT to remove .Kroput ransomware
KVRT is a free portable application that scans your PC for ransomware viruses including .Kroput ransomware and helps remove them easily. Moreover, it will also allow you remove trojans, worms and other malicious software.
Download Kaspersky virus removal tool (KVRT) by clicking on the following link.
Author: Kaspersky® lab
Category: Security tools
Update: March 5, 2018
After the download is done, double-click on the KVRT icon. Once initialization process is done, you will see the Kaspersky virus removal tool screen like below.
Click Change Parameters and set a check near all your drives. Press OK to close the Parameters window. Next press Start scan button . KVRT utility will begin scanning the whole machine to find out .Kroput ransomware virus, other trojans and malicious apps. Depending on your computer, the scan can take anywhere from a few minutes to close to an hour. When a threat is found, the number of the security threats will change accordingly. Wait until the the checking is finished.
When the scanning is done, KVRT will open a scan report like below.
You may remove threats (move to Quarantine) by simply click on Continue to begin a cleaning task.
How to decrypt .kroput files
The .Kroput ransomware virus offers victim to contact it’s makers in order to decrypt all personal files. These persons will require to pay a ransom (usually demand for $490-980 in Bitcoins).
If your files have been encrypted by the .Kroput ransomware virus, We recommends: do not to pay the ransom. If this malware make money for its developers, then your payment will only increase attacks against you. Of course, decryption without the private key is not possible, but that does not mean that the .Kroput ransomware must seriously disrupt your live.
Use STOPDecrypter to decrypt .kroput files
Michael Gillespie (@) released a free decryption tool named STOPDecrypter (download from download.bleepingcomputer.com/demonslay335/STOPDecrypter.zip).
STOPDecrypter has been updated to include decryption support for the following .djvu* variants (.djvu, .djvuu, .udjvu, .djvuq, .djvur, .djvut, .pdff, .tro, .tfude, .tfudeq, .tfudet, .rumba, .adobe, .adobee, .blower, .promos. STOPDecrypter will work for any extension of the Djvu* variants including new extensions (.kroput).
Please check the twitter post for more info.
How to restore .kroput files
In some cases, you can recover files encrypted by .Kroput ransomware virus. Try both methods. Important to understand that we cannot guarantee that you will be able to restore all encrypted personal files.
Recover .kroput encrypted files using Shadow Explorer
The Microsoft Windows has a feature called ‘Shadow Volume Copies’ that can help you to restore .kroput files encrypted by the .Kroput ransomware virus. The way described below is only to restore encrypted personal files to previous versions from the Shadow Volume Copies using a free tool called the ShadowExplorer.
Visit the following page to download the latest version of ShadowExplorer for MS Windows. Save it on your Windows desktop.
Category: Security tools
Update: September 15, 2019
After downloading is finished, open a directory in which you saved it. Right click to ShadowExplorer-0.9-portable and select Extract all. Follow the prompts. Next please open the ShadowExplorerPortable folder as shown in the following example.
Double click ShadowExplorerPortable to start it. You will see the a window like below.
In top left corner, select a Drive where encrypted files are stored and a latest restore point as shown in the figure below (1 – drive, 2 – restore point).
On right panel look for a file that you want to restore, right click to it and select Export like below.
Run PhotoRec to restore .kroput files
Before a file is encrypted, the .Kroput ransomware virus makes a copy of this file, encrypts it, and then deletes the original file. This can allow you to recover your documents, photos and music using file recover programs such as PhotoRec.
Download PhotoRec from the link below. Save it on your MS Windows desktop or in any other place.
Category: Security tools
Update: March 1, 2018
When the downloading process is done, open a directory in which you saved it. Right click to testdisk-7.0.win and select Extract all. Follow the prompts. Next please open the testdisk-7.0 folder as on the image below.
Double click on qphotorec_win to run PhotoRec for MS Windows. It will open a screen like below.
Choose a drive to recover as displayed in the following example.
You will see a list of available partitions. Choose a partition that holds encrypted files as on the image below.
Press File Formats button and choose file types to restore. You can to enable or disable the restore of certain file types. When this is complete, press OK button.
Next, click Browse button to choose where restored files should be written, then click Search.
Count of recovered files is updated in real time. All recovered personal files are written in a folder that you have chosen on the previous step. You can to access the files even if the recovery process is not finished.
When the recovery is complete, press on Quit button. Next, open the directory where restored personal files are stored. You will see a contents as shown in the following example.
All recovered personal files are written in recup_dir.1, recup_dir.2 … sub-directories. If you are searching for a specific file, then you can to sort your recovered files by extension and/or date/time.
How to protect your computer from .Kroput ransomware?
Most antivirus applications already have built-in protection system against the ransomware. Therefore, if your PC system does not have an antivirus application, make sure you install it. As an extra protection, use the HitmanPro.Alert.
Run HitmanPro.Alert to protect your machine from .Kroput ransomware virus
HitmanPro.Alert is a small security tool. It can check the system integrity and alerts you when critical system functions are affected by malware. HitmanPro.Alert can detect, remove, and reverse ransomware effects.
Download HitmanPro.Alert on your MS Windows Desktop by clicking on the following link.
Category: Security tools
Update: March 6, 2019
Once the downloading process is done, open the file location. You will see an icon like below.
Double click the HitmanPro.Alert desktop icon. After the tool is launched, you’ll be shown a window where you can choose a level of protection, like below.
Now click the Install button to activate the protection.
To sum up
After completing the steps above, your machine should be clean from .Kroput ransomware and other malware. Your system will no longer encrypt your personal files. Unfortunately, if the step-by-step guide does not help you, then you have caught a new ransomware virus, and then the best way – ask for help here.