Kraken Cryptor Ransomware
Written by Tomas Meskauskas on (updated)
What is Kraken Cryptor?
Kraken Cryptor is high-risk ransomware discovered by malware security researcher, Jakob Kroustek. Immediately after infiltration, Kraken Cryptor encrypts most stored files and renames them using the "[file_number]-Lock.onion" pattern.
For example, names of encrypted files might become "00000000-Lock.onion", "00000001-Lock.onion", "00000002-Lock.onion", and so on. Encrypted data becomes unusable and indistinguishable. Following successful encryption, Kraken Cryptor generates a text file ("# How to Decrypt Files.txt") and places a copy in all existing folders.
As with most ransomware, Kraken Cryptor's text file delivers a message informing victims of the encryption and encouraging them pay for a decryption tool to restore their data. It is currently unknown which type of cryptography (symmetric or asymmetric) Kraken Cryptor uses. In any case, a unique decryption key is generated for each victim.
Restoring data without the key is impossible. Cyber criminals store keys on a remote server. To receive their keys (or rather, decryption tools with keys embedded within), victims must pay a ransom of .125 Bitcoin (currently equivalent to ~$830). Note, however, that cyber criminals can never be trusted.
Never pay or attempt to contact these people. Research shows that ransomware developers often ignore victims, once payments are submitted.
Paying often gives no positive result and victims are scammed. Unfortunately, there are no tools capable of cracking Kraken Cryptor encryption and restoring data free of charge. There is only one way to resolve this issue - to restore everything from a backup.
Screenshot of a message encouraging users to pay a ransom to decrypt their compromised data:
Kraken Cryptor is virtually identical to RYUK, Xorist, ShutUpAndDance, and dozens of other ransomware-type viruses. Research shows that, although these viruses are developed by different cyber criminals, their behavior is identical - all encrypt files and make ransom demands.
There are typically just two major differences: 1) size of ransom, and; 2) type of encryption algorithm used. Unfortunately, many ransomware infections employ algorithms that generate unique decryption keys (e.g., RSA, AES, and so on).
Therefore, unless the virus is not fully developed or has certain bugs/flaws, restoring data manually without involvement of developers (contacting these people is not recommended) is impossible.
Ransomware is one of the main reasons why you should maintain regular data backups, however, it is very important to store them on a remote server or unplugged storage device, otherwise the ransomware might encrypt backups together with regular files.
How did ransomware infect my computer?
Cyber criminals proliferate malware in various ways, however, the most common five are: 1) fake software updaters; 2) peer-to-peer [P2P] networks [torrents, eMule, etc.]; 3) third party software download sources [free file hosting websites, freeware download websites, etc.]; 4) spam email campaigns [malicious attachments], and; 5) trojans.
Fake updaters infect the system by exploiting outdated software bugs/flaws or simply downloading and installing malware rather than updates. P2P networks and other unofficial download sources present malware as legitimate software, thereby tricking users into downloading and installing viruses.
Infectious attachments typically come in the format of MS Office documents. Once opened, they immediately download and install malware. Trojans simply open "backdoors" for other viruses to infiltrate the system.
| Name | Kraken Cryptor virus |
| Threat Type | Ransomware, Crypto Virus, Files locker |
| Symptoms | Can't open files stored on your computer, previously functional files now have a different extension, for example my.docx.locked. A ransom demanding message is displayed on your desktop. Cyber criminals are asking to pay 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. |
How to protect yourself from ransomware infections?
To prevent system infections, be very cautious when browsing the Internet and downloading/installing/updating software. Download software from official sources only, using direct download links. Third party downloaders/installers often include rogue apps, and thus should never be used. The same rule applies to software updates.
Keeping installed applications up-to-date is very important, however, this should be achieved via official updaters or implemented functions only. Think twice before opening email attachments. Files that seem irrelevant or have been received from suspicious/unrecognizable email addresses should never be opened.
The presence of a reputable anti-virus/anti-spyware suite is also essential. The main reasons for computer infections are poor knowledge and careless behavior - the key to safety is caution. If your computer is already infected with Kraken Cryptor, we recommend running a scan with Combo Cleaner Antivirus for Windows to automatically eliminate this ransomware.
Text presented in Kraken Cryptor ransomware text file ("# How to Decrypt Files.txt"):
Alternative : BM-2cWdhn4f5UyMvruDBGs5bK77NsCFALMJkR@bitmessage.ch
* DON'T ASK PEOPLE OR DATA RECOVERY CENTERS, THEY CANNOT DIRECT DECRYPT YOUR FILES AND CONTACT WITH US, THEY ARE MAY ADD EXTRA CHARGE!
* DON'T MODIFY KRAKEN ENCRYPTED UNIQUE KEY!
* DON'T MODIFY OR RENAME ENCRYPTED FILES!
* DON'T USE THIRD-PARTY OR PUBLIC TOOLS/SOFTWARE TO DECRYPT YOUR FILES, THIS CAUSE DAMAGE YOUR FILES PERMANENTLY!
- Also, our policy is obvious: NO PAYMENT! NO DECRYPT!, if you do not have the ability to pay, we review your terms.
- Project KRAKEN CRYPTOR doesn't damage any of your files, this action is reversible if you follow the instructions above.
READ THIS GUIDE BELOW TO RECOVERY YOUR FILES!
> Additional
> Attention
> How can recover my files?
> How much is need to pay?
> How to obtain Bitcoins?
> What happened to my computer?
> What the mean is encryption?
ALL YOUR FILES HAS BEEN ENCRYPTED BY KRAKEN CRYPTOR!
What happened to my computer?
All of your files such as documents, images, videos and other files with the different names and extensions are encrypted by KRAKEN CRYPTOR!
The speed, power and complexity of this encryption have been high and if you are now viewing this guide.
It means that KRAKEN CRYPTOR immediately removed form your system!No way to recovery your files without KRAKEN DECRYPTOR software and your computer UNIQUE KEY!
You need to buy it from us because only we can help you!
What the mean is encryption?
In cryptography, encryption is the process of encoding a message or information in such a way that only authorized parties can access it.
And those who are not authorized cannot.
How can recover my files?
We guarantee that you can recover all your files soon safely.
You can decrypt one of your encrypted smaller file for free in the first contact with us.
For the decryption service, we also need your KRAKEN ENCRYPTED UNIQUE KEY you can see this in the top!
Are you want to decrypt all of your encrypted files? if yes! You need to pay for decryption service to us!
After your payment made, all of your encrypted files has been decrypted.
How much is need to pay?
You need to pay (0.125 BTC), payment only can made as Bitcoins.
This links help you to understand whats is a Bitcoins and how it work:
hxxps://en.wikipedia.org/wiki/Bitcoins
How to obtain Bitcoins?
The easiest way to buy Bitcoins is LocalBitcoins website.
You must register on this site and click BUY Bitcoins then choose your country to find sellers and their prices.
hxxps://localBitcoins.com/buy_Bitcoins
Other places to buy Bitcoins in exchange for other currencies:
hxxps://Bitcoins.org/en/exchanges
Attention* DON'T MODIFY OR RENAME ENCRYPTED FILES!* DON'T MODIFY KRAKEN ENCRYPTED UNIQUE KEY!* DON'T USE THIRD-PARTY OR PUBLIC TOOLS/SOFTWARE TO DECRYPT YOUR FILES, THIS CAUSE DAMAGE YOUR FILES PERMANENTLY!* DON'T ASK PEOPLE OR DATA RECOVERY CENTERS, THEY CANNOT DIRECT DECRYPT YOUR FILES AND CONTACT WITH US, THEY ARE MAY ADD EXTRA CHARGE!> Additional- Project KRAKEN CRYPTOR doesn't damage any of your files, this action is reversible if you follow the instructions above.- Also, our policy is obvious: NO PAYMENT! NO DECRYPT!, if you do not have the ability to pay, we review your terms.
E-Mail : onionhelp@memeware.net
After your payment made, all of your encrypted files has been decrypted.
All of your files such as documents, images, videos and other files with the different names and extensions are encrypted by KRAKEN CRYPTOR!
And those who are not authorized cannot.
Are you want to decrypt all of your encrypted files? if yes! You need to pay for decryption service to us!
For the decryption service, we also need your KRAKEN ENCRYPTED UNIQUE KEY you can see this in the top!
hxxps://Bitcoins.org/en/exchanges
hxxps://en.wikipedia.org/wiki/Bitcoins
hxxps://localBitcoins.com/buy_Bitcoins
In cryptography, encryption is the process of encoding a message or information in such a way that only authorized parties can access it.
It means that KRAKEN CRYPTOR immediately removed form your system!
No way to recovery your files without KRAKEN DECRYPTOR software and your computer UNIQUE KEY!
Other places to buy Bitcoins in exchange for other currencies:
The easiest way to buy Bitcoins is LocalBitcoins website.
The speed, power and complexity of this encryption have been high and if you are now viewing this guide.
This links help you to understand whats is a Bitcoins and how it work:
We guarantee that you can recover all your files soon safely.
You can decrypt one of your encrypted smaller file for free in the first contact with us.
You must register on this site and click BUY Bitcoins then choose your country to find sellers and their prices.
You need to buy it from us because only we can help you!
You need to pay (0.125 BTC), payment only can made as Bitcoins.
Screenshot of files encrypted by Kraken Cryptor ("[file_number]-Lock.onion" filename pattern):
Update 14 September 2018: Cyber criminals have updated this ransomware. This update was noticed by security researcher MalwareHunterTeam It is now called KRAKEN CRYPTOR 1.5 and a ransom-demand message is presented in # How to Decrypt Files.html:
Kraken Cryptor 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:
▼ DOWNLOAD Combo Cleaner
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Video suggesting what steps should be taken in case of a ransomware infection:
Quick menu:
- What is Kraken Cryptor virus?
- STEP 1. Reporting ransomware to authorities.
- STEP 2. Isolating the infected device.
- STEP 3. Identifying the ransomware infection.
- STEP 4. Searching for ransomware decryption tools.
- STEP 5. Restoring files with data recovery tools.
- STEP 6. Creating data backups.
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):
USA - Internet Crime Complaint Centre IC3
United Kingdom - Action Fraud
Spain - Policía Nacional
France - Ministère de l'Intérieur
Germany - Polizei
Italy - Polizia di Stato
The Netherlands - Politie
Poland - Policja
Portugal - Polícia Judiciária
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: 
Click the "Change adapter settings" option in the upper-left corner of the window: 
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". 
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": 
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).
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).
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).
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):
Example 2 (.iso [Phobos] ransomware):
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.
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.
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:
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:
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 cloud icon to open the OneDrive menu. While in this menu, you can customize your file backup settings.
Click Help & Settings and then select Settings from the drop-down menu.
Go to the Backup tab and click Manage 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.
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.
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.
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.
To access files only located on OneDrive online, go to the Help & Settings drop-down menu and select View online.
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.
Outstanding!
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