Kadavro Vector (.vector_) ransomware virus - removal and decryption options

Also Known As: Kadavro Vector virus
Damage level: Severe

What kind of malware is Kadavro Vector?

Kadavro Vector is ransomware that our team discovered while examining malware samples submitted to the VirusTotal page. The purpose of ransomware is to encrypt the victim's data. In addition to blocking access to files, Kadavro Vector appends the ".vector_" extension to filenames and displays a ransom note.

An example of how Kadavro Vector modifies filenames: it changes "1.jpg" to "1.jpg.vector_", "2.png" to "2.png.vector_", and so forth.

Screenshot of files encrypted by this ransomware:

Files encrypted by Kadavro Vector ransomware (.vector_ extension)

Kadavro Vector ransom note overview

Kadavro Vector's ransom note is available in different languages (English, Russian and Norwegian). It informs victims that their files will be deleted after a certain amount of time and that the encryption algorithm used for encryption is highly secure, making recovery impossible.

The ransom note also warns victims not to turn off their Internet or computers, as doing so could result in further file loss and instructs them to purchase $250 worth of Monero cryptocurrency to pay for the decryption of their files.

More details about ransomware

Decrypting files without paying the ransom is usually not possible, except when a functional third-party decryption tool is available online or if the affected users have backed up their files. Paying a ransom to the attackers is not recommended as it can be risky and may not guarantee the return of encrypted data, resulting in financial loss.

Also, it is important to remove the ransomware from the system to prevent further data loss through additional encryption.

Ransomware in general

Ransomware typically shares common features, such as file encryption, modification of file extensions, and the appearance of a ransom note. It is uncommon to decrypt data without the cooperation of the attackers, which is why having important files stored on an offline device or remote server is strongly recommended.

Examples of different ransomware variants are Cooper, Boza, and RED BANNER.

How did ransomware infect my computer?

Threat actors use various ways to distribute ransomware, including pages offering pirated or cracked software, emails containing harmful links or files, Trojans delivering additional payloads, fake software updates, P2P networks, third-party downloaders, and free file hosting pages. Cybercriminals rely on users downloading and running ransomware for their attacks to succeed.

The primary file types employed to deceive users into infecting their computers with malware include malicious MS Office and PDF documents, archives, ISO files, executables, and JavaScript files.

Threat Summary:
Name Kadavro Vector virus
Threat Type Ransomware, Crypto Virus, Files locker
Encrypted Files Extension .vector_
Ransom Demanding Message Pop-up window
Free Decryptor Available? No
Ransom Amount $250 worth in Monero cryptocurrency
Monero Wallet 46RvQJ7RVMNXTu4aRRrrwuNJqogM7hA1z6B uBqC9robLeaVAT4LQdwLdHWEP9WZR8oRNowkAW5ghhPZjYmKTcPjd8sMPAmE
Detection Names Avast (Win32:RansomX-gen [Ransom]), Combo Cleaner (Gen:Heur.Ransom.HiddenTears.1), ESET-NOD32 (A Variant Of MSIL/Filecoder.AGA), Kaspersky (HEUR:Trojan-Ransom.Win32.Generic), Microsoft (Ransom:MSIL/Cryptolocker.DV!MTB), Full List Of Detections (VirusTotal)
Symptoms Cannot open files stored on your computer, previously functional files now have a different extension (for example, my.docx.locked). A ransom demand message is displayed on your desktop. Cyber criminals demand payment of a ransom (usually in bitcoins) to unlock your files.
Distribution methods Infected email attachments (macros), torrent websites, malicious ads.
Damage All files are encrypted and cannot be opened without paying a ransom. Additional password-stealing trojans and malware infections can be installed together with a ransomware infection.
Malware Removal (Windows)

To eliminate possible malware infections, scan your computer with legitimate antivirus software. Our security researchers recommend using Combo Cleaner.
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How to protect yourself from ransomware infections?

Download software solely from official and trusted sources while avoiding third-party downloaders, suspicious websites, and comparable sources. Do not open attachments or website links from unknown or irrelevant email addresses, and always analyze emails before opening their contents.

Do not click on links and ads on dubious sites. Perform regular threat scans and keep the operating system and installed software updated. If your computer is already infected with Kadavro Vector, we recommend running a scan with Combo Cleaner Antivirus for Windows to automatically eliminate this ransomware.

Screenshot of Kadavro Vector's ransom note:

Kadavro Vector ransomware ransom note

Text in the ransom note:


All your files have been encrypted with the powerful Kadavro Vector ransomware.

Kadavro Vector is a well-designed ransomware that encrypts all your data, passwords, text data, exe handlers, projects, and a lot of recovery files. No one except our team is able to decrypt your files.

The first thing you need to do is follow our instructions. If you skip one step, you may regret your data.

1) Do not turn off the Internet. Why ?
  - If you turn off your internet, KADAVRO VECTOR will lose connection with the server, and this will cause you to lose files even after paying for the decryption.

2) Do not turn off your computer. Why ?
- Turning off the computer will cause KADAVRO VECTOR to lose connection with the server as well. This will result in file loss. There is a small chance that the panel will appear after restarting / shutting down the computer, then you still have to pay

3) Carefully read the purchase of monero, monero is a crypto currency through which you will have to pay for the decryption of your files.


Все ваши файлы были зашифрованы мощной программой-вымогателем Kadavro Vector.

Kadavro Vector — это хорошо продуманная программа-вымогатель, которая шифрует все ваши данные, пароли, текстовые данные, обработчики исполняемых файлов, проекты и множество файлов восстановления. Никто, кроме нашей команды, не сможет расшифровать ваши файлы.

Первое, что вам нужно сделать, это следовать нашим инструкциям. Если вы пропустите один шаг, вы можете пожалеть о своих данных.

1) Не отключайте интернет. Почему ?
   - Если вы отключите интернет, KADAVRO VECTOR потеряет связь с сервером, и это приведет к потере файлов даже после оплаты расшифровки.

2) Не выключайте компьютер. Почему ?
- Выключение компьютера также приведет к потере связи KADAVRO VECTOR с сервером. Это приведет к потере файла. Есть небольшой шанс, что панель появится после перезагрузки/выключения компьютера, тогда все равно придется платить

3) Внимательно читайте покупку Monero, Monero - это криптовалюта, через которую вам придется платить за расшифровку ваших файлов.


Alle filene dine er kryptert med den kraftige Anon Kadavro løsepengevaren.

Kadavro Vector er en godt designet løsepengeprogramvare som krypterer alle dine data, passord, tekstdata, exe-behandlere, prosjekter og mange gjenopprettingsfiler. Ingen bortsett fra teamet vårt er i stand til å dekryptere filene dine.

Det første du må gjøre er å følge instruksjonene våre. Hvis du hopper over ett trinn, kan du angre på dataene dine.

1) Ikke slå av Internett. Hvorfor ?
   – Hvis du slår av internett, vil KADAVRO VECTOR miste forbindelsen med serveren, og dette vil føre til at du mister filer selv etter å ha betalt for dekrypteringen.

2) Ikke slå av datamaskinen. Hvorfor ?
- Å slå av datamaskinen vil føre til at KADAVRO VECTOR også mister forbindelsen med serveren. Dette vil føre til tap av filer. Det er en liten sjanse for at panelet dukker opp etter omstart / slått av datamaskinen, da må du fortsatt betale

3) Les nøye gjennom kjøpet av Monero, Monero er en kryptovaluta som du må betale for dekrypteringen av filene dine.

Send $250 worth of Monero to this address:

46RvQJ7RVMNXTu4aRRrrwuNJqogM7hA1z6B uBqC9robLeaVAT4LQdwLdHWEP9WZR8oRNowkAW5ghhPZjYmKTcPjd8sMPAmE


All your files will be deleted after the time specified on the screen
Files are deleted using one of the most secure algorithms (Air Force AFSSI-5020), without the possibility of recovery. Hurry up.


Все ваши файлы будут удалены по истечении времени, указанного на экране
Файлы удаляются по одному из самых безопасных алгоритмов (Air Force AFSSI-5020), без возможности восстановления. Торопитесь.

Screenshot of Kadavro Vector's desktop wallpaper:

Kadavro Vector ransomware wallpaper

Kadavro Vector ransomware removal:

Instant automatic malware removal: Manual threat removal might be a lengthy and complicated process that requires advanced IT skills. Combo Cleaner is a professional automatic malware removal tool that is recommended to get rid of malware. Download it by clicking the button below:
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Video suggesting what steps should be taken in case of a ransomware infection:

Quick menu:

Reporting ransomware to authorities:

If you are a victim of a ransomware attack we recommend reporting this incident to authorities. By providing information to law enforcement agencies you will help track cybercrime and potentially assist in the prosecution of the attackers. Here's a list of authorities where you should report a ransomware attack. For the complete list of local cybersecurity centers and information on why you should report ransomware attacks, read this article.

List of local authorities where ransomware attacks should be reported (choose one depending on your residence address):

Isolating the infected device:

Some ransomware-type infections are designed to encrypt files within external storage devices, infect them, and even spread throughout the entire local network. For this reason, it is very important to isolate the infected device (computer) as soon as possible.

Step 1: Disconnect from the internet.

The easiest way to disconnect a computer from the internet is to unplug the Ethernet cable from the motherboard, however, some devices are connected via a wireless network and for some users (especially those who are not particularly tech-savvy), disconnecting cables may seem troublesome. Therefore, you can also disconnect the system manually via Control Panel:

Navigate to the "Control Panel", click the search bar in the upper-right corner of the screen, enter "Network and Sharing Center" and select search result: Disconnecting computer from the Internet (step 1)

Click the "Change adapter settings" option in the upper-left corner of the window: Disconnecting computer from the Internet (step 2)

Right-click on each connection point and select "Disable". Once disabled, the system will no longer be connected to the internet. To re-enable the connection points, simply right-click again and select "Enable". Disconnecting computer from the Internet (step 3)

Step 2: Unplug all storage devices.

As mentioned above, ransomware might encrypt data and infiltrate all storage devices that are connected to the computer. For this reason, all external storage devices (flash drives, portable hard drives, etc.) should be disconnected immediately, however, we strongly advise you to eject each device before disconnecting to prevent data corruption:

Navigate to "My Computer", right-click on each connected device, and select "Eject": Ejecting external storage devices

Step 3: Log-out of cloud storage accounts.

Some ransomware-type might be able to hijack software that handles data stored within "the Cloud". Therefore, the data could be corrupted/encrypted. For this reason, you should log-out of all cloud storage accounts within browsers and other related software. You should also consider temporarily uninstalling the cloud-management software until the infection is completely removed.

Identify the ransomware infection:

To properly handle an infection, one must first identify it. Some ransomware infections use ransom-demand messages as an introduction (see the WALDO ransomware text file below).

Identify ransomware-type infection (step 1)

This, however, is rare. In most cases, ransomware infections deliver more direct messages simply stating that data is encrypted and that victims must pay some sort of ransom. Note that ransomware-type infections typically generate messages with different file names (for example, "_readme.txt", "READ-ME.txt", "DECRYPTION_INSTRUCTIONS.txt", "DECRYPT_FILES.html", etc.). Therefore, using the name of a ransom message may seem like a good way to identify the infection. The problem is that most of these names are generic and some infections use the same names, even though the delivered messages are different and the infections themselves are unrelated. Therefore, using the message filename alone can be ineffective and even lead to permanent data loss (for example, by attempting to decrypt data using tools designed for different ransomware infections, users are likely to end up permanently damaging files and decryption will no longer be possible even with the correct tool).

Another way to identify a ransomware infection is to check the file extension, which is appended to each encrypted file. Ransomware infections are often named by the extensions they append (see files encrypted by Qewe ransomware below).

Identify ransomware-type infection (step 2)

This method is only effective, however, when the appended extension is unique - many ransomware infections append a generic extension (for example, ".encrypted", ".enc", ".crypted", ".locked", etc.). In these cases, identifying ransomware by its appended extension becomes impossible.

One of the easiest and quickest ways to identify a ransomware infection is to use the ID Ransomware website. This service supports most existing ransomware infections. Victims simply upload a ransom message and/or one encrypted file (we advise you to upload both if possible).

Identify ransomware-type infection (step 3)

The ransomware will be identified within seconds and you will be provided with various details, such as the name of the malware family to which the infection belongs, whether it is decryptable, and so on.

Example 1 (Qewe [Stop/Djvu] ransomware):

Identify ransomware-type infection (step 4)

Example 2 (.iso [Phobos] ransomware):

Identify ransomware-type infection (step 5)

If your data happens to be encrypted by ransomware that is not supported by ID Ransomware, you can always try searching the internet by using certain keywords (for example, a ransom message title, file extension, provided contact emails, crypto wallet addresses, etc.).

Search for ransomware decryption tools:

Encryption algorithms used by most ransomware-type infections are extremely sophisticated and, if the encryption is performed properly, only the developer is capable of restoring data. This is because decryption requires a specific key, which is generated during the encryption. Restoring data without the key is impossible. In most cases, cybercriminals store keys on a remote server, rather than using the infected machine as a host. Dharma (CrySis), Phobos, and other families of high-end ransomware infections are virtually flawless, and thus restoring data encrypted without the developers' involvement is simply impossible. Despite this, there are dozens of ransomware-type infections that are poorly developed and contain a number of flaws (for example, the use of identical encryption/decryption keys for each victim, keys stored locally, etc.). Therefore, always check for available decryption tools for any ransomware that infiltrates your computer.

Finding the correct decryption tool on the internet can be very frustrating. For this reason, we recommend that you use the No More Ransom Project and this is where identifying the ransomware infection is useful. The No More Ransom Project website contains a "Decryption Tools" section with a search bar. Enter the name of the identified ransomware, and all available decryptors (if there are any) will be listed.

Searching for ransomware decryption tools in nomoreransom.org website

Restore files with data recovery tools:

Depending on the situation (quality of ransomware infection, type of encryption algorithm used, etc.), restoring data with certain third-party tools might be possible. Therefore, we advise you to use the Recuva tool developed by CCleaner. This tool supports over a thousand data types (graphics, video, audio, documents, etc.) and it is very intuitive (little knowledge is necessary to recover data). In addition, the recovery feature is completely free.

Step 1: Perform a scan.

Run the Recuva application and follow the wizard. You will be prompted with several windows allowing you to choose what file types to look for, which locations should be scanned, etc. All you need to do is select the options you're looking for and start the scan. We advise you to enable the "Deep Scan" before starting, otherwise, the application's scanning capabilities will be restricted.

Recuva data recovery tool wizard

Wait for Recuva to complete the scan. The scanning duration depends on the volume of files (both in quantity and size) that you are scanning (for example, several hundred gigabytes could take over an hour to scan). Therefore, be patient during the scanning process. We also advise against modifying or deleting existing files, since this might interfere with the scan. If you add additional data (for example, downloading files/content) while scanning, this will prolong the process:

Recuva data recovery tool scan time

Step 2: Recover data.

Once the process is complete, select the folders/files you wish to restore and simply click "Recover". Note that some free space on your storage drive is necessary to restore data:

Recuva data recovery tool recovering data

Create data backups:

Proper file management and creating backups is essential for data security. Therefore, always be very careful and think ahead.

Partition management: We recommend that you store your data in multiple partitions and avoid storing important files within the partition that contains the entire operating system. If you fall into a situation whereby you cannot boot the system and are forced to format the disk on which the operating system is installed (in most cases, this is where malware infections hide), you will lose all data stored within that drive. This is the advantage of having multiple partitions: if you have the entire storage device assigned to a single partition, you will be forced to delete everything, however, creating multiple partitions and allocating the data properly allows you to prevent such problems. You can easily format a single partition without affecting the others - therefore, one will be cleaned and the others will remain untouched, and your data will be saved. Managing partitions is quite simple and you can find all the necessary information on Microsoft's documentation web page.

Data backups: One of the most reliable backup methods is to use an external storage device and keep it unplugged. Copy your data to an external hard drive, flash (thumb) drive, SSD, HDD, or any other storage device, unplug it and store it in a dry place away from the sun and extreme temperatures. This method is, however, quite inefficient, since data backups and updates need to be made regularly. You can also use a cloud service or remote server. Here, an internet connection is required and there is always the chance of a security breach, although it's a really rare occasion.

We recommend using Microsoft OneDrive for backing up your files. OneDrive lets you store your personal files and data in the cloud, sync files across computers and mobile devices, allowing you to access and edit your files from all of your Windows devices. OneDrive lets you save, share and preview files, access download history, move, delete, and rename files, as well as create new folders, and much more.

You can back up your most important folders and files on your PC (your Desktop, Documents, and Pictures folders). Some of OneDrive’s more notable features include file versioning, which keeps older versions of files for up to 30 days. OneDrive features a recycling bin in which all of your deleted files are stored for a limited time. Deleted files are not counted as part of the user’s allocation.

The service is built using HTML5 technologies and allows you to upload files up to 300 MB via drag and drop into the web browser or up to 10 GB via the OneDrive desktop application. With OneDrive, you can download entire folders as a single ZIP file with up to 10,000 files, although it can’t exceed 15 GB per single download.

OneDrive comes with 5 GB of free storage out of the box, with an additional 100 GB, 1 TB, and 6 TB storage options available for a subscription-based fee. You can get one of these storage plans by either purchasing additional storage separately or with Office 365 subscription.

Creating a data backup:

The backup process is the same for all file types and folders. Here’s how you can back up your files using Microsoft OneDrive

Step 1: Choose the files/folders you want to backup.

Click the OneDrive icon in the taskbar

Click the OneDrive cloud icon to open the OneDrive menu. While in this menu, you can customize your file backup settings.

Select Help & Settings and click Settings

Click Help & Settings and then select Settings from the drop-down menu.

Select the Backup tab and click Manage backup

Go to the Backup tab and click Manage backup.

Select folders to backup and click Start backup

In this menu, you can choose to backup the Desktop and all of the files on it, and Documents and Pictures folders, again, with all of the files in them. Click Start backup.

Now, when you add a file or folder in the Desktop and Documents and Pictures folders, they will be automatically backed up on OneDrive.

To add folders and files, not in the locations shown above, you have to add them manually.

Select a file manually and copy it

Open File Explorer and navigate to the location of the folder/file you want to backup. Select the item, right-click it, and click Copy.

Paste the copied file in the OneDrive folder to create a backup

Then, navigate to OneDrive, right-click anywhere in the window and click Paste. Alternatively, you can just drag and drop a file into OneDrive. OneDrive will automatically create a backup of the folder/file.

File statuses in OneDrive folder

All of the files added to the OneDrive folder are backed up in the cloud automatically. The green circle with the checkmark in it indicates that the file is available both locally and on OneDrive and that the file version is the same on both. The blue cloud icon indicates that the file has not been synced and is available only on OneDrive. The sync icon indicates that the file is currently syncing.

Click Help & Settings and click View Online

To access files only located on OneDrive online, go to the Help & Settings drop-down menu and select View online.

Click the Settings cog and click Options

Step 2: Restore corrupted files.

OneDrive makes sure that the files stay in sync, so the version of the file on the computer is the same version on the cloud. However, if ransomware has encrypted your files, you can take advantage of OneDrive’s Version history feature that will allow you to restore the file versions prior to encryption.

Microsoft 365 has a ransomware detection feature that notifies you when your OneDrive files have been attacked and guide you through the process of restoring your files. It must be noted, however, that if you don’t have a paid Microsoft 365 subscription, you only get one detection and file recovery for free.

If your OneDrive files get deleted, corrupted, or infected by malware, you can restore your entire OneDrive to a previous state. Here’s how you can restore your entire OneDrive:


1. If you're signed in with a personal account, click the Settings cog at the top of the page. Then, click Options and select Restore your OneDrive.

If you're signed in with a work or school account,  click the Settings cog at the top of the page. Then, click Restore your OneDrive.

2. On the Restore your OneDrive page, select a date from the drop-down list. Note that if you're restoring your files after automatic ransomware detection, a restore date will be selected for you.

3. After configuring all of the file restoration options, click Restore to undo all the activities you selected.

The best way to avoid damage from ransomware infections is to maintain regular up-to-date backups.

Frequently Asked Questions (FAQ)

How was my computer hacked and how did hackers encrypt my files?

Users can infect computers in multiple ways, such as installing malicious software, opening links or attachments in phishing emails, visiting malicious or compromised websites, and connecting to infected external storage devices. Moreover, attackers may use software and operating system vulnerabilities to infiltrate computers.

How to open ".vector_" files?

Your files have been encrypted due to a ransomware attack, and decryption is necessary for you to access them.

Where should I look for free decryption tools for Kadavro Vector ransomware?

In case of a ransomware attack you should check the No More Ransom project website (more information above).

I can pay you a lot of money, can you decrypt files for me?

Our team does not offer this service. Ransomware typically encrypts files in a way that cannot be decrypted without the involvement of the attackers unless there are flaws in the ransomware itself. Therefore, any third party offering to decrypt your files for a fee acts as a middleman or attempts to scam you.

Will Combo Cleaner help me remove Kadavro Vector ransomware?

Combo Cleaner can scan your computer and remove any active ransomware infections. However, it is important to note that antivirus software can only help with the first step of ransomware recovery, which is removing the infection. Decrypting the encrypted files is not possible with security software.

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About the author:

Tomas Meskauskas

Tomas Meskauskas - expert security researcher, professional malware analyst.

I am passionate about computer security and technology. I have an experience of over 10 years working in various companies related to computer technical issue solving and Internet security. I have been working as an author and editor for pcrisk.com since 2010. Follow me on Twitter and LinkedIn to stay informed about the latest online security threats. Contact Tomas Meskauskas.

PCrisk security portal is brought by a company RCS LT. Joined forces of security researchers help educate computer users about the latest online security threats. More information about the company RCS LT.

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Malware activity

Global malware activity level today:

Medium threat activity

Increased attack rate of infections detected within the last 24 hours.

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