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Kasiski ransomware virus. How to Remove? (Uninstall Guide)

removal by - -   | Type: Ransomware
12

Kasiski ransomware speaks Spanish, wants $500 from each victim

Kasiski virus appears to be a new type of ransomware[1], which, surprisingly, is created for an x64[2] version of Windows. The name of this ransomware is derived from names of corrupted files that Kasiski virus renames during the encryption process. Unlike other ransomware, it doesn’t add extensions but appends [KASISKI] prefix to the file names. The virus can be installed by the user himself, without knowing what kind of file/program it is. As we have already mentioned, Kasiski malware encrypts[3] almost all files with a strong cipher and then changes desktop background with a basic yellow picture with some text written on it. Then the virus drops a file called INSTRUCCIONES.txt (on the desktop) which is known to be a "ransom note." Cybercriminals typically create such files on the system after corrupting victim’s data. They aim to inform the victim how the corrupted data can be recovered, and usually, they demand money. In this ransom note, authors of Kasiski ransomware ask the victim to pay a ransom in Bitcoins. They promise to provide a "DECRYPT TOOL" for $500. Here's how the beginning of the ransom note looks:

Informacion importante

Este es su numero personal (NO LO BORRE) =

Todos sus archivos fueron encryptados (bloqueados)/

Para restaurar sus archivos usted necesita un (DECRYPT TOOL)

Nosotros le ofrecemos el (DECRYPT TOOL) para restaurar sus archivos, su costo es de ($500) quinie

However, we never advise victims to pay the ransom because obviously, cybercriminals are not the people you can count on. Therefore, we usually advise victims to remove Kasiski ransomware from the system using anti-malware tools such as Reimage and find a backup, which is needed for data recovery. If you do not have a backup[4], you can try data recovery methods provided below the article. However, the virus is under analysis at the moment, so researchers might come up with Kasiski decrypt tool very soon. Until then, take care of Kasiski removal to secure your PC from possible additional malware attacks.

Traditional ransomware distribution techniques

How ransomware crooks distribute their malicious programs depends on their programming skills. More advanced ones employ hacking skills to spread malicious files via ad networks, others use exploit kits[5], and finally some scammers use Trojans to infect devices with ransomware. However, the most efficient technique so far is also very basic one. Malware authors only need to compose convincing email letters and send them out to hundreds or even thousands of victims. The message typically says that the user needs to view "attached contents." However, we advise users to think whether a) they know the sender personally or not; b) were they expecting to receive such email or not. If the answer to these questions is no, better stay away from such letters and delete them ASAP.

How can I remove Kasiski virus?

If your computer was compromised, remove Kasiski virus immediately. Ransomware-type programs often come with various additional features such as an ability to install new malware, transmit personal information and even more. To make your PC safe again, it is recommended to use a powerful anti-malware software such as Reimage. Full Kasiski removal guidelines are given down below - follow them carefully, do not rush! You do not want to miss infectious components because if you do so, they might weaken your PC’s security, which would allow other viruses infiltrate the system easier.

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If you failed to remove infection using Reimage Reimage, submit a question to our support team and provide as much details as possible.
Reimage is recommended to uninstall Kasiski 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.
Reimage is recommended to uninstall Kasiski 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.
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References

Method 1. Remove Kasiski using Safe Mode with Networking

To eliminate Kasiski ransomware, carry out these instructions. You will need to restart your PC and run it into Safe Mode with Networking first.

Step 1: Reboot your computer to Safe Mode with Networking
Windows 7 / Vista / XP
  • Click Start Shutdown Restart OK.
  • When your computer becomes active, start pressing F8 multiple times until you see the Advanced Boot Options window.
  • Select Safe Mode with Networking from the list
Select 'Safe Mode with Networking'
Windows 10 / Windows 8
  • Press the Power button at the Windows login screen. Now press and hold Shift, which is on your keyboard, and click Restart..
  • Now select Troubleshoot Advanced options Startup Settings and finally press Restart.
  • Once your computer becomes active, select Enable Safe Mode with Networking in Startup Settings window.
Select 'Enable Safe Mode with Networking'
Step 2: Remove Kasiski

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 Kasiski removal.

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

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

Method 2. Remove Kasiski using System Restore

Step 1: Reboot your computer to Safe Mode with Command Prompt
Windows 7 / Vista / XP
  • Click Start Shutdown Restart OK.
  • When your computer becomes active, start pressing F8 multiple times until you see the Advanced Boot Options window.
  • Select Command Prompt from the list
Select 'Safe Mode with Command Prompt'
Windows 10 / Windows 8
  • Press the Power button at the Windows login screen. Now press and hold Shift, which is on your keyboard, and click Restart..
  • Now select Troubleshoot Advanced options Startup Settings and finally press Restart.
  • 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
  • Once the Command Prompt window shows up, enter cd restore and click Enter. Enter 'cd restore' without quotes and press 'Enter'
  • Now type rstrui.exe and press Enter again.. Enter 'rstrui.exe' without quotes and press 'Enter'
  • When a new window shows up, click Next and select your restore point that is prior the infiltration of Kasiski. After doing that, click Next. When 'System Restore' window shows up, select 'Next' Select your restore point and click 'Next'
  • 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 Kasiski removal is performed successfully.
Reimage is a tool to detect malware. You need to purchase full version to remove infections.
More information about Reimage
Reimage is a tool to detect malware. You need to purchase full version to remove infections. More information about Reimage

Bonus: Recover your data

Guide which is presented above is supposed to help you remove Kasiski from your computer. To recover your encrypted files, we recommend using a detailed guide prepared by 2-spyware.com security experts.

If your files are encrypted by Kasiski, you can use several methods to restore them:

Use System Restore Point

If you have several important files that you must decrypt as soon as possible, we highly recommend using this method. However, you can use it only if you have created a system restore point in the past.

  • Find an encrypted file you need to restore and right-click on it;
  • Select "Properties" and go to "Previous versions" tab;
  • Here, check each of available copies of the file in "Folder versions". You should select the version you want to recover and click "Restore".

ShadowExplorer

It is currently unknown whether Kasiski virus deletes Volume Shadow Copies from compromised PC or not. We suggest running ShadowExplorer to find that out.

  • Download Shadow Explorer (http://shadowexplorer.com/);
  • Follow a Shadow Explorer Setup Wizard and install this application on your computer;
  • Launch the program and go thru the drop down menu on the top left corner to select the disk of your encrypted data. Check what folders are there;
  • Right-click on the folder you want to restore and select "Export". You can also select where you want it to be stored.

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

Gabriel E. Hall
Gabriel E. Hall - Passionate virus researcher

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Information updated:

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