Complete Kristina Ransomware Removal Guide (Full Instructions)

Kristina ransomware image

An infection with the dangerous Kristina Ransomware leads to serious security issues. Victims can restore and protect their computers by following our complete removal guide.

Remove Kristina Ransomware and Restore PC
Manual Removal Guide
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Distribution of Kristina Ransomware

The Kristina ransomware is a new virus which has been sighted in a limited attack campaign. At the moment the security researchers cannot determine the primary infection strategy. We presume that the most widely used tactics are going to be employed.

Among them are the email messages created in an automated way and sent to large lists of potential victims. The Kristina ransomware can be directly attached to the messages. This is one of the easiest way for the criminals to attempt the infection. However a lot of email hosting providers usually capture the signatures of the virus and as such discard such messages or label them as dangerous or spam. Other infection methods related to this one is the option of inserting hyperlinks in the body content of the messages. The links are usually labeled as leading to a familiar website or a file of user interest. Redirects can redirect to hacker-controlled sites, infected payloads or other instances that can lead to an Kristina Ransomware infection.

The computer criminals behind the malware can create malicious sites or download portals which distribute malware of different kinds, including the Kristina Ransomware. A popular option is the use of infected documents which may be of different types ‒ spreadsheets, rich text documents, presentations and databases. They are modified to initiate the virus once the built-in scripts are run. Usually when the files are opened a notification will ask the users to run the macros (scripts). If this is done the infection follows.

The hacker-controlled sites are specialist portals that have been created either manually or automatically by the criminals behind the Kristina Ransomware. They can either directly distribute the threat by initiating various scripts or automated operations or link to such instances. Redirects are usually caused by email interaction, ad networks or other browsing activity. However one of the main sources is the availability of browser hijackers. They are malicious addons made for the most popular web browsers ‒ Mozilla Firefox, Google Chrome, Internet Explorer, Opera, Microsoft Edge and Safari. Once installed they not only infect the users with the malware, but also redirect the victims to a hacker-controlled site. Depending on the configuration the browser hijackers can also steal sensitive information such as any stored passwords, account credentials, history, bookmarks, form data and settings.

Impact of Kristina Ransomware

As usual the hacker operators blackmail the victims into paying them the sum of $50 in Bitcoins to the designated address. We recommend that all users abstain from communicating with the hackers and use our full Kristina ransomware removal guide below to recover their data and delete the active infections. Kristina Ransomware has been discovered in a series of hacker attacks around the world. At the moment the collected samples associated with it are relatively few in number. In the same time the security researchers are not yet ready with the full security analysis. A behavioral check shows that at the moment the captured samples contain only a very limited number of modules. It is presumed that the virus can be extended further by adding new features over time. Examples include the following:

  • Information Harvesting ‒ The criminals can steal sensitive data before the encryption process is started.
  • Trojan Module ‒ It can be used to spy on the victim machines and overtake control on request.
  • Additional Virus Delivery ‒ The Kristina ransomware can be used to deploy other malware to the target computers.

The researchers that initiated the Kristina ransomware overview note that the engine has the ability to extract a lot of data from the victim machines. The collection includes not only the hardware components, installed software and user settings. The procedure is done in order to generate the unique infection ID (UIID) used to identify each victim computer. Like previous malware samples it uses a list of target file type extensions built into the infection module. Data which may become affected includes the following: backups, images, videos, music, databases, configuration files and etc.

The Kristina ransomware might be part of an older malware family known as Crypt12. Some security specialists propose that this is an updated version that uses code snippets taken from the old source. It is possible for the code to have posted or sold on the hacker underground communities and from there modified to create the resulting malware. The original threat was written in the .NET programming language which is compatible with all contemporary versions of Microsoft Windows. Kristina ransomware can be invoked either automatically or manually as part of a more complex infection scenario. A possible attack route speculated by some specialists includes the following mechanism:

  • The hackers infect the victim machines with several malware, among them the Kristina ransomware.
  • Trojan components or an updated version of the virus is invoked.
  • Once the hackers have access to the victim machine they can invoke the Kristina ransomware with parameters of their choice.

The processed files are renamed following a predefined formula: [victim’s-id]-[developer’s-email].crypt12. All victim files are assigned this identifier after the process is complete. At the same an application frame is created which bears the title “KristinaCS L1.0” along with the unique infection id (listed as “cryptid”). It shows the current state of encryption and serves as an intimidating psychological mechanism. At the same time the background wallpaper is changed to reflect the infection. Red text is placed on a black background showing the following text:

Your files Have Been Crypted email to: [email protected] for instructions

This is a widely used blackmail tactics which relies on manipulation of the victims. The users are instructed to contact the hackers and no specified ransomware sum is shown. In all cases this should be avoided as the use of a quality anti-spyware solution can effectively restore infected computers and remove the infections.

Remove Kristina Ransomware and Restore PC

WARNING! Manual removal of the Kristina Ransomware requires being familiar with system files and registries. Removing important data accidentally can lead to permanent system damage. If you don’t feel comfortable with manual instructions, download a powerful anti-malware tool that will scan your system for malware and clean it safely for you.

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SpyHunter anti-malware tool will diagnose all current threats on the computer. By purchasing the full version, you will be able to remove all malware threats instantly. Additional information about SpyHunter / Help to uninstall SpyHunter

Kristina Ransomware – Manual Removal Steps

Start the PC in Safe Mode with Network

This will isolate all files and objects created by the ransomware so they will be removed efficiently. The steps bellow are applicable to all Windows versions.

1. Hit the WIN Key + R

2. A Run window will appear. In it, write msconfig and then press Enter

3. A Configuration box shall appear. In it Choose the tab named Boot

4. Mark Safe Boot option and then go to Network under it to tick it too

5. Apply -> OK

Remove Kristina from Windows

Here’s a way to remove the program. This method will work regardless if you’re on Windows 10, 8, 7, Vista or XP. Simply selecting the program and pressing delete won’t work, as it’ll leave a lot of small files. That’s bad because these leftovers can linger on and cause all sorts of problems. The best way to delete a program is to uninstall it. Here’s how you can do that:

1. Hold the “Windows” button (It’s between CTRL and Alt on most keyboards) and press “R”. You’ll see a pop-up window.


2. In the textbox, type “appwiz.cpl”, then press“ Enter ”.


3. The “Programs and features” menu should now appear. It’s a list of all the programs installed on the PC. Here you can find the program, select it, and press “Uninstall“.


Remove Kristina Virus From Your Browser

Before resetting your browser’s settings, you should know that this action will wipe out all your recorded usernames, passwords, and other types of data. Make sure to save them in some way.

Removal guide for Mozilla Firefox Removal guide for Google Chrome Removal guide for Internet Explorer

    1. Start Mozilla Firefox. In the upper right corner, click on the Open menu icon and select “Add-ons“.

    2. Inside the Add-ons Manager select “Extensions“. Search the list of extensions for suspicious entries. If you find any, select them and click “Remove“.

    3. Click again on the Open menu icon, then click “Options“.

    4. In the Options window, under “General” tab, click “Restore to Default“.

    5. Select “Search” in the left menu, mark the unknown search engine and press “Remove”.

    1. Start Google Chrome. On the upper-right corner, there a “Customize and Control” menu icon. Click on it, then click on “Settings“.


    2. Click “Extensions” in the left menu. Then click on the trash bin icon to remove the suspicious extension.

    3. Again in the left menu, under Chrome, Click on “Settings“. Go under “On Startup” and set a new page.

    4. Afterward, scroll down to “Search“, click on “Manage search engines“.

    5. In the default search settings list, find the unknown search engine and click on “X“. Then select your search engine of choice and click “Make default“. When you are ready click “Done” button in the right bottom corner.

1. Start Internet Explorer. Go to the “Tools” menu and click on “Manage add-ons“.

2. In the “Manage add-ons” window, bellow “Add-on Types“, select “Toolbars and Extensions“. If you see a suspicious toolbar, select it and click “Remove“.

3. Then again in the “Manage Add-ons” window, in “Add-on Types“, Select “Search Providers“. Chose a search engine and click “Set as default“. Select the unknown search engine and click “Remove and Close”.

4. Open the Tools menu, select “Internet Options”.

5. In the “General” tab, in “Home page”, enter your preferred page. Click “Apply” and “OK”.

Repair Windows Registry

1. Again type simultaneously the WIN Key + R key combination

2. In the box, write regedit and hit Enter

3. Type the CTRL+ F and then write the malicious name in the search type field to locate the malicious executable

4. In case you have discovered registry keys and values related to the name, you should delete them, but be careful not to delete legitimate keys

Click for more information about Windows Registry and further repair help

Preventive Security Measures

  • Enable and properly configure your Firewall.
  • Install and maintain reliable anti-malware software.
  • Secure your web browser.
  • Check regularly for available software updates and apply them.
  • Disable macros in Office documents.
  • Use strong passwords.
  • Don’t open attachments or click on links unless you’re certain they’re safe.
  • Backup regularly your data.
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    Author : Martin Beltov

    Martin graduated with a degree in Publishing from Sofia University. As a cyber security enthusiast he enjoys writing about the latest threats and mechanisms of intrusion.

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