How to uninstall Black Claw ransomware

Also Known As: BlackClaw ransomware
Distribution: Low
Damage level: Severe

Black Claw ransomware removal instructions

What is Black Claw?

Black Claw (also known as BlackClaw) makes files inaccessible by encrypting them with AES and RSA encryption algorithms, renames every encrypted file, and generates two ransom messages. It renames files by adding the victim's ID (e.g., "hgcapmh02i") and appending the ".bclaw" extension to filenames. For example, it might rename a file named "1.jpg" to "1.jpg.[hgcapmh02i].bclaw", "2.jpg" to "2.jpg.[hgcapmh02i].bclaw", and so on. Instructions about how to contact the cyber criminals behind Black Claw (and other details) are provided in the "RECOVER YOUR FILES.txt" and "RECOVER YOUR FILES.hta" files.

The ransom messages generated by Black Claw ransomware state that victims must contact the developers by sending a message to the bclaw@hitler.rocks email address or T.me\B_Claw account on Telegram and await further instructions. The size of the ransom is not mentioned, however, it is stated that it will be doubled after 48 hours. Therefore, cyber criminals behind this ransomware attempt to coerce victims to contact them and pay immediately. Generally, victims cannot decrypt files compromised by ransomware without decryption tools (software and/or key) held only by the developers. Unfortunately, there are no other tools capable of decrypting files compromised by Black Claw. Another problem with ransomware attacks is that victims are often scammed and do not receive any decryption tools, even after payment. Therefore, never trust any cyber criminals. The only free way to avoid data loss in such cases is to restore files from a backup. If some files remain unencrypted, these can be protected from further encryption by uninstalling the ransomware. Files that are already encrypted remain compromised even after removal of ransomware.

Screenshot of a message encouraging users to pay a ransom to decrypt their compromised data:

Black Claw decrypt instructions (RECOVER YOUR FILES.hta)

In summary, programs of this type encrypt data and create/display ransom messages that contain instructions about how to contact cyber criminals, and some other information. Common differences are encryption algorithm (symmetric or asymmetric) that ransomware uses to encrypt data and size of ransom. More examples of ransomware infections are FRM, LickyAgent and Zwer. As mentioned, in most cases, it is impossible to decrypt files without tools held only by the cyber criminals behind the ransomware, unless in rare cases the ransomware is not finished (has bugs, flaws, etc.). Therefore, maintain backups on remote servers and/or unplugged storage devices.

How did ransomware infect my computer?

Commonly, criminals send emails that contain malicious attachments or website links designed to download malicious files, and then attempt to deceive recipients into opening them. When opened (executed), the files cause installation of malware. Examples of files that cyber criminals attach to their emails are malicious Microsoft Office, PDF documents, executable files such as .exe, archive files such as ZIP, RAR and JavaScript files. Attempts to activate licensed software with third party, unofficial 'cracking' tools can lead to installation of malicious software. These tools supposedly bypass activation, however, they often infect computers with malware. Trojans are malicious programs that can cause chain infections: they install additional malware. Peer-to-Peer networks (e.g., torrent clients, eMule), third party downloaders, installers, freeware download websites, free file hosting websites, etc., are often used to host and distribute malicious files. Typically, they are disguised as legitimate and harmless. When users download and open them, however, they install malicious software onto systems. Fake, deceptive updaters also spread rogue software. These tools infect computers by exploiting bugs/flaws of outdated software that is installed on the operating system, or by installing malicious programs rather than updates and fixes.

Threat Summary:
Name BlackClaw ransomware
Threat Type Ransomware, Crypto Virus, Files locker.
Encrypted Files Extension .bclaw
Ransom Demand Message RECOVER YOUR FILES.txt, RECOVER YOUR FILES.hta
Cyber Criminal Contact bclaw@hitler.rocks, T.me\B_Claw on Telegram.
Detection Names Avast (Win32:Trojan-gen), BitDefender (Gen:Heur.Ransom.Imps.3), ESET-NOD32 (A Variant Of MSIL/Filecoder.AAA), Kaspersky (HEUR:Trojan-Ransom.MSIL.Gen.gen), 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)

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How to protect yourself from ransomware infections

Third party downloaders, installers, Peer-to-Peer networks, and other download/installation tools should not be trusted. The safest way to download files and programs is using official websites and direct links. Unofficial, fake updaters and activators should never be used. All software should be updated and activated only through implemented functions or with tools that are designed by official software developers. Another problem with third party activation tools is that it is illegal to use them to activate any licensed software. Attachments and links within irrelevant emails should not be opened without being sure that it is safe to do so, especially if the emails were received from unknown, suspicious addresses. Note that cyber criminals often disguise their emails as important and official by exploiting names of legitimate companies/organizations, etc. Keep computers safe by regularly scanning them for threats with reputable antivirus or anti-spyware software and keep this software up to date. If your computer is already infected with Black Claw, we recommend running a scan with Malwarebytes for Windows to automatically eliminate this ransomware.

Text presented in Black Claw ransomware "RECOVER YOUR FILES.hta" file :

All your files have been encrypted!

 

All your files have been encrypted (WITH AES+RSA) due to a security problem with your PC. If you want to restore them, write us an email and attach one of encrypted files(less than 1mb): bclaw@hitler.rocks
or send a message to our telegram account: T.me\B_Claw

 

in case of no anwser in 2 hours contact with us throught Telegram account T.me\B_Claw

 

Include this id in your message or email:
hgcapmh02i


YOU HAVE ONLY 48 HOURS TO CONTACT US. WHEN THIS TIME ENDS THE PRICE WILL BE TWICE AS MUCH


1d 23h 53m 16s

# Free decryption as guarantee


Before paying you can send up to 1 file for free decryption.


# How to obtain Bitcoin


The easiest way to buy Bitcoin in Localbitcoins.com website.
hxxps://localbitcoins.com/buy_bitcoins

Also you can find other places to buy Bitcoins and beginner guide here:
hxxps://www.coindesk.com/learn/bitcoin-101/how-can-i-buy-bitcoins


# ATTENTION !!!


DO NOT RENAME THE FILES.
BLACK CLAW RANSOMWARE

Screenshot of Black Claw text file ("RECOVER YOUR FILES.txt"):

Black Claw ransomware text file (RECOVER YOUR FILES.txt)

Text in this file:

All your files have been encrypted (WITH AES+RSA) due to a security problem with your PC. If you want to restore them, write us an email and attach one of encrypted files(less than 1mb): bclaw@hitler.rocks
or send a message to our telegram account: T.me\B_Claw

 

in case of no anwser in 2 hours contact with us throught Telegram account T.me\B_Claw

 

Include this id in your message or email: -

 

YOU HAVE ONLY 48 HOURS TO CONTACT US. WHEN THIS TIME ENDS THE PRICE WILL BE TWICE AS MUCH

 

# Free decryption as guarantee

 

Before paying you can send up to 1 file for free decryption.

 

# ATTENTION !!!
DO NOT RENAME THE FILES.

 

BLACK CLAW RANSOMWARE

Screenshot of files encrypted by Black Claw (".bclaw" extension):

Files encrypted by Black Claw ransomware (.bclaw extension)

Black Claw ransomware removal:

Instant automatic malware removal: Manual threat removal might be a lengthy and complicated process that requires advanced computer skills. Malwarebytes 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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Quick menu:

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 a ransomware that is not supported by ID Ransomware, you can always try searching the internet by using certain keywords (for example, ransom message title, file extension, provided contact emails, cryptowallet 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, cyber criminals 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 EaseUS Data Recovery Wizard Pro. 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).

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EaseUS Data Recovery Wizard Pro

By downloading any software listed on this website you agree to our Privacy Policy and Terms of Use. Trial version of EaseUS Data Recovery Wizard Pro is capable of scanning drives and listing recoverable files - to restore them, you must purchase a license.

Step 1: Perform a scan.

Hover your mouse over the partition you wish to scan and select "Scan". You can also select a specific folder, or click shortcut icons to scan the Desktop or Recycle Bin: Scanning the storage drive with EaseUS Data Recovery Wizard PRO (step 1)

Wait for EaseUS Data Recovery Wizard Pro 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 hundreds 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: Scanning the storage drive with EaseUS Data Recovery Wizard PRO (step 2)

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. Note also that the trial version of EaseUS Data Recovery Wizard Pro is only capable of scanning drives and listing recoverable files - to restore them, you must purchase a license: Recovering data with EaseUS Data Recovery Wizard Pro

Step 3: Save the scan session (optional).

We recommend that you save the scanning session once you have completed recovery, in case you decide to recover additional files later. Simply click the "Save Scan Session" icon in the upper-right corner of the screen and choose the location for the file to be saved. This will save a lot of time, since you will not need to re-scan the storage drive the next time you wish to restore something. Bear in mind, however, that data removed after the scanning session has finished will not be listed: Saving scan session in EaseUS Data Recovery Wizard Pro

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 necessary information on Microsoft's documentation web page.

Data backups: The most reliable backup method 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 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. Therefore, you should consider using an application to create data backups locally.

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EaseUS Todo Backup

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We recommend using the EaseUS Todo Backup application. The "Home" edition of EaseUS Todo Backup is usually more than adequate for regular users, however, the "Business" edition is more suitable for companies and large computer networks. The EaseUS Todo Backup application provides extensive data protection features. You can easily create backups, and encrypt and compress them for enhanced protection and storage saving purposes. It also allows you to set backup schedules, create bootable devices, and restore the system if a crash occurs. You can easily choose where to store the created backup: locally; uploaded to an external drive; FTP; cloud storage, or elsewhere. In summary, EaseUS Todo Backup is an all-in-one tool, which provides all features required to properly backup your data.

Creating a data backup:

The backup process is virtually identical regardless of the item (file, partition, entire system) you wish to backup. Taking the File Backup feature as an example:

Step 1: Choose which item to backup.

Click on the "Menu" icon in the upper-left corner of the screen to reveal the menu and select "File Backup": Creating data backups with EaseUS Todo Backup tool (step 1)

Select the files you want to backup. You can also enter a name and description of the backup that will be created: Creating data backups with EaseUS Todo Backup tool (step 2)

Step 2: Change the default settings.

The EaseUS Todo Backup application provides a variety of additional options that can be added/modified while creating the backup. For example, you can encrypt data (add a password), select the compression rate (how much the backup should be compressed), performance (how many system resources should be allocated), add an email notification (you receive an email once the process is complete) and so on.

To open the options window, click the "Backup options" button in the lower-left corner of the screen: Creating data backups with EaseUS Todo Backup tool (step 3)

Select the settings you want to change and click "Save". You can also reset your changes by clicking "Reset to initial settings": Creating data backups with EaseUS Todo Backup tool (step 4)

Step 3: Select the backup destination.

As mentioned above, EaseUS Todo Backup allows you to choose where backups are saved - locally or externally.

Click the "Browse..." button and select the location you want the backup to be saved: Creating data backups with EaseUS Todo Backup tool (step 5)

Step 4: Safety measures and process completion.

Depending on the location you have chosen, there are a number of measures you should or should not take. If you are uploading to an internet-connected location (for example, Cloud storage, FTP, etc.), be sure to maintain your internet connection, otherwise you will have to start again. The same applies to external storage devices - do not unplug them until the process is complete.

The progress bar displays estimated time remaining until completion. Large backups (hundreds of gigabytes) can take hours to create (depending on storage device speed, internet connection, etc.). Therefore, the application also allows you to optionally choose what the system should do (shut down, sleep or hibernate) once the process has finished: Creating data backups with EaseUS Todo Backup tool (step 6)

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

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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