What Is BlackFL Virus?
Trouble dealing with the BlackFL Virus? You’re in the right place—this article will guide you through understanding and removing this nasty ransomware. BlackFL is a dangerous virus that locks up your personal files using encryption and then demands a ransom in exchange for restoring access. Most users get infected by opening harmful emails or downloading shady software. This threat can also sneak in through disguised code or bundled installers, making it hard to catch early.
Once BlackFL slips into your PC, it immediately goes after your files—encrypting them and changing their names to include the .BlackFL extension. It also drops a ransom note named OPENME.txt right on your system, telling you to pay up. Our investigation shows the infection usually spreads through spam emails, cracked software, or dangerous websites. BlackFL uses complex encryption, and paying the ransom is never a safe bet—it rarely guarantees you’ll get your data back. Instead, your focus should be on removing the threat completely and exploring safe file recovery methods. Follow the steps below to clean your device.
![BlackFL Virus Ransomware [.BlackFL Files] Removal + Fix](https://cdn.sensorstechforum.com/wp-content/uploads/2025/07/BlackFL-virus-ransomware-removal-1024x576.jpg)
BlackFL Ransomware Virus – Details
| File Extension | .BlackFL |
| Type | Ransomware, Cryptovirus |
| Short Description | The ransomware encrypts files on your computer system and demands a ransom to be paid to allegedly recover them. |
| Symptoms | The BlackFL Virus ransomware will encrypt your files by appending a random name extension to them. |
| Ransom Demanding Note | BlackField_ReadMe.txt |
| Distribution Method | Spam Emails, Email Attachments |
| Detection Tool |
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How Did I Get Infected?
Your system may have picked up the BlackFL ransomware through:
- Opening emails with infected files or clicking risky links from unknown senders.
- Using hacked software or downloading from shady sites.
BlackFL Virus – What Does It Do?
BlackFL locks your files using encryption, stopping you from accessing your data. It can target a wide range of file types, and sometimes it even tries to gather sensitive information before encrypting. The hackers behind it demand you send cryptocurrency to get a decryption tool.
This ransomware also connects to remote servers, increasing the risk of more infections. It places malicious files in multiple system locations to dig deeper into your OS:
- %Local%
- %Temp%
- %Windows%
- %SystemDrive%
- %LocalLow%
- %AppData%
- %System%
- %system32%
To ensure it launches every time you boot up your PC, it adds values to your Windows Registry.
The ransom note, named BlackField_ReadMe.txt, includes instructions from the attackers. It usually reads something like this:
Hi friends,
Whatever who you are and what your title is if you’re reading this it means the internal infrastructure of your company is fully or partially
dead, all your backups – virtual, physical – everything that we managed to reach – are completely removed. Moreover,
we have taken a great amount of your corporate data prior to encryption.Well, for now let’s keep all the tears and resentment to ourselves and try to build a constructive dialogue.
We’re fully aware of what damage we caused by locking your internal sources. At the moment, you have to know:1. Dealing with us you will save A LOT due to we are not interested in ruining your financially. We will study in depth your finance,
bank & income statements, your savings, investments etc. and present our reasonable demand to you. If you have an active cyber insurance,
let us know and we will guide you how to properly use it. Also, dragging out the negotiation process will lead to failing of a deal.2. Paying us you save your TIME, MONEY, EFFORTS and be back on track within 24 hours approximately.
Our decryptor works properly on any files or systems,
so you will be able to check it by requesting a test decryption service from the beginning of our conversation. If you decide to recover on your own,
keep in mind that you can permanently lose access to some files or accidently corrupt them – in this case we won’t be able to help.3. The security report or the exclusive first-hand information that you will receive upon reaching an agreement is of a great value,
since NO full audit of your network will show you the vulnerabilities that we’ve managed to detect and used in order to get into,
identify backup solutions and upload your data.4. As for your data, if we fail to agree, we will try to sell personal information/trade secrets/databases/source codes – generally speaking,
everything that has a value on the darkmarket – to multiple threat actors at ones. Then all of this will be published in our blog –5. We’re more than negotiable and will definitely find the way to settle this quickly and reach an agreement which will satisfy both of us.
If you’re indeed interested in our assistance and the services we provide you can reach out to us following simple instructions:
Primary email : yamag@onionmail.org use this as the title of your email –
Secondary email(backup email in case we didn’t answer you in 24h) : yamag@tuta.io , TELEGRAM: @gotchadec
Keep in mind that the faster you will get in touch, the less damage we cause.
In many cases, attackers even offer to decrypt a few smaller, non-critical files as “proof” that they can unlock your data.
What Are .BlackFL Encrypted Files?
When BlackFL encrypts your files, it adds the .BlackFL extension, locking them with powerful encryption algorithms. These attacks often hit:
- Videos (.mp4, .avi, etc.)
- Audio files (.mp3, .wav, etc.)
- Pictures (.jpg, .png, etc.)
- Archives (.zip, .rar, etc.)
- Documents (.docx, .pptx, etc.)
- Other frequently used files.
Only the attackers have the private key needed to decrypt these files. For example, if you had a file named “Example.jpg”, it would now appear as:
Example.jpg.BlackFL
How to Remove BlackFL Virus
To get rid of the BlackFL Virus, the safest and most effective route is to run a complete scan with a trusted anti-malware tool. Trying to remove this ransomware manually is not recommended unless you’re an expert in cybersecurity. A solid antivirus program can detect, quarantine, and delete the infection while helping protect your system from future attacks.
Ventsislav Krastev
Ventsislav is a cybersecurity expert at SensorsTechForum since 2015. He has been researching, covering, helping victims with the latest malware infections plus testing and reviewing software and the newest tech developments. Having graduated Marketing as well, Ventsislav also has passion for learning new shifts and innovations in cybersecurity that become game changers. After studying Value Chain Management, Network Administration and Computer Administration of System Applications, he found his true calling within the cybersecrurity industry and is a strong believer in the education of every user towards online safety and security.
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Step 1: Scan for BlackFL with SpyHunter Anti-Malware Tool
Ransomware Automatic Removal - Video Guide
Step 2: Uninstall BlackFL and related malware from Windows
Here is a method in few easy steps that should be able to uninstall most programs. No matter if you are using Windows 10, 8, 7, Vista or XP, those steps will get the job done. Dragging the program or its folder to the recycle bin can be a very bad decision. If you do that, bits and pieces of the program are left behind, and that can lead to unstable work of your PC, errors with the file type associations and other unpleasant activities. The proper way to get a program off your computer is to Uninstall it. To do that:
Follow the instructions above and you will successfully delete most unwanted and malicious programs.
Step 3: Clean any registries, created by BlackFL on your computer.
The usually targeted registries of Windows machines are the following:
- HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run
- HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
- HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\RunOnce
- HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\RunOnce
You can access them by opening the Windows registry editor and deleting any values, created by BlackFL there. This can happen by following the steps underneath:
Tip: To find a virus-created value, you can right-click on it and click "Modify" to see which file it is set to run. If this is the virus file location, remove the value.
Before starting "Step 4", please boot back into Normal mode, in case you are currently in Safe Mode.
This will enable you to install and use SpyHunter 5 successfully.
Step 4: Boot Your PC In Safe Mode to isolate and remove BlackFL
Step 5: Try to Restore Files Encrypted by BlackFL.
Method 1: Use STOP Decrypter by Emsisoft.
Not all variants of this ransomware can be decrypted for free, but we have added the decryptor used by researchers that is often updated with the variants which become eventually decrypted. You can try and decrypt your files using the instructions below, but if they do not work, then unfortunately your variant of the ransomware virus is not decryptable.
Follow the instructions below to use the Emsisoft decrypter and decrypt your files for free. You can download the Emsisoft decryption tool linked here and then follow the steps provided below:
1 Right-click on the decrypter and click on Run as Administrator as shown below:
2. Agree with the license terms:
3. Click on "Add Folder" and then add the folders where you want files decrypted as shown underneath:
4. Click on "Decrypt" and wait for your files to be decoded.
Note: Credit for the decryptor goes to Emsisoft researchers who have made the breakthrough with this virus.
Method 2: Use data recovery software
Ransomware infections and BlackFL aim to encrypt your files using an encryption algorithm which may be very difficult to decrypt. This is why we have suggested a data recovery method that may help you go around direct decryption and try to restore your files. Bear in mind that this method may not be 100% effective but may also help you a little or a lot in different situations.
Simply click on the link and on the website menus on the top, choose Data Recovery - Data Recovery Wizard for Windows or Mac (depending on your OS), and then download and run the tool.
BlackFL-FAQ
What is BlackFL Ransomware?
BlackFL is a ransomware infection - the malicious software that enters your computer silently and blocks either access to the computer itself or encrypt your files.
Many ransomware viruses use sophisticated encryption algorithms to make your files inaccessible. The goal of ransomware infections is to demand that you pay a ransom payment to get access to your files back.
What Does BlackFL Ransomware Do?
Ransomware in general is a malicious software that is designed to block access to your computer or files until a ransom is paid.
Ransomware viruses can also damage your system, corrupt data and delete files, resulting in the permanent loss of important files.
How Does BlackFL Infect?
Via several ways.BlackFL Ransomware infects computers by being sent via phishing emails, containing virus attachment. This attachment is usually masked as an important document, like an invoice, bank document or even a plane ticket and it looks very convincing to users.
Another way you may become a victim of BlackFL is if you download a fake installer, crack or patch from a low reputation website or if you click on a virus link. Many users report getting a ransomware infection by downloading torrents.
How to Open .BlackFL files?
You can't without a decryptor. At this point, the .BlackFL files are encrypted. You can only open them once they are decrypted using a specific decryption key for the particular algorithm.
What to Do If a Decryptor Does Not Work?
Do not panic, and backup the files. If a decryptor did not decrypt your .BlackFL files successfully, then do not despair, because this virus is still new.
Can I Restore ".BlackFL" Files?
Yes, sometimes files can be restored. We have suggested several file recovery methods that could work if you want to restore .BlackFL files.
These methods are in no way 100% guaranteed that you will be able to get your files back. But if you have a backup, your chances of success are much greater.
How To Get Rid of BlackFL Virus?
The safest way and the most efficient one for the removal of this ransomware infection is the use a professional anti-malware program.
It will scan for and locate BlackFL ransomware and then remove it without causing any additional harm to your important .BlackFL files.
Can I Report Ransomware to Authorities?
In case your computer got infected with a ransomware infection, you can report it to the local Police departments. It can help authorities worldwide track and determine the perpetrators behind the virus that has infected your computer.
Below, we have prepared a list with government websites, where you can file a report in case you are a victim of a cybercrime:
Cyber-security authorities, responsible for handling ransomware attack reports in different regions all over the world:
Germany - Offizielles Portal der deutschen Polizei
United States - IC3 Internet Crime Complaint Centre
United Kingdom - Action Fraud Police
France - Ministère de l'Intérieur
Italy - Polizia Di Stato
Spain - Policía Nacional
Netherlands - Politie
Poland - Policja
Portugal - Polícia Judiciária
Greece - Cyber Crime Unit (Hellenic Police)
India - Mumbai Police - CyberCrime Investigation Cell
Australia - Australian High Tech Crime Center
Reports may be responded to in different timeframes, depending on your local authorities.
Can You Stop Ransomware from Encrypting Your Files?
Yes, you can prevent ransomware. The best way to do this is to ensure your computer system is updated with the latest security patches, use a reputable anti-malware program and firewall, backup your important files frequently, and avoid clicking on malicious links or downloading unknown files.
Can BlackFL Ransomware Steal Your Data?
Yes, in most cases ransomware will steal your information. It is a form of malware that steals data from a user's computer, encrypts it, and then demands a ransom in order to decrypt it.
In many cases, the malware authors or attackers will threaten to delete the data or publish it online unless the ransom is paid.
Can Ransomware Infect WiFi?
Yes, ransomware can infect WiFi networks, as malicious actors can use it to gain control of the network, steal confidential data, and lock out users. If a ransomware attack is successful, it could lead to a loss of service and/or data, and in some cases, financial losses.
Should I Pay Ransomware?
No, you should not pay ransomware extortionists. Paying them only encourages criminals and does not guarantee that the files or data will be restored. The better approach is to have a secure backup of important data and be vigilant about security in the first place.
What Happens If I Don't Pay Ransom?
If you don't pay the ransom, the hackers may still have access to your computer, data, or files and may continue to threaten to expose or delete them, or even use them to commit cybercrimes. In some cases, they may even continue to demand additional ransom payments.
Can a Ransomware Attack Be Detected?
Yes, ransomware can be detected. Anti-malware software and other advanced security tools can detect ransomware and alert the user when it is present on a machine.
It is important to stay up-to-date on the latest security measures and to keep security software updated to ensure ransomware can be detected and prevented.
Do Ransomware Criminals Get Caught?
Yes, ransomware criminals do get caught. Law enforcement agencies, such as the FBI, Interpol and others have been successful in tracking down and prosecuting ransomware criminals in the US and other countries. As ransomware threats continue to increase, so does the enforcement activity.
About the BlackFL Research
The content we publish on SensorsTechForum.com, this BlackFL how-to removal guide included, is the outcome of extensive research, hard work and our team’s devotion to help you remove the specific malware and restore your encrypted files.
How did we conduct the research on this ransomware?
Our research is based on an independent investigation. We are in contact with independent security researchers, and as such, we receive daily updates on the latest malware and ransomware definitions.
Furthermore, the research behind the BlackFL ransomware threat is backed with VirusTotal and the NoMoreRansom project.
To better understand the ransomware threat, please refer to the following articles which provide knowledgeable details.
As a site that has been dedicated to providing free removal instructions for ransomware and malware since 2014, SensorsTechForum’s recommendation is to only pay attention to trustworthy sources.
How to recognize trustworthy sources:
- Always check "About Us" web page.
- Profile of the content creator.
- Make sure that real people are behind the site and not fake names and profiles.
- Verify Facebook, LinkedIn and Twitter personal profiles.