O4kjj Ransomware is a dangerous file-encrypting malware infection. It secretly attack the targeted PC and lock all the files to demand ransom money from users to unlock them. It uses a very powerful encryption algorithm to encode your files and it cannot be deciphered without the decryption key.
During the encryption phase, It renames files on your PC by adding “.O4kjj” extension to original file names. For example, a file with original name “1.jpg” would appear as “1.jpg.O4kjj” after the encryption process. A ransom note named as “p3qn_HOW_TO_DECRYPT.txt” containing ransom demand and payment instructions is also dropped into all the compromised folders. If you want to get rid of this infection and recover your files then read this guide.
What is .O4kjj File Virus
.O4kjj Ransomware is a data locker malware that encrypts all digital files on a compromised PC. It only converts files into inaccessible format then demands extortion money to restore files. This dubious threat is blackmailing malware that prevents users from accessing their personal files and forces them to pay money to reverse the encryption. It is able to attack all versions of Windows computers without the permission of the user. Upon successful intrusion, the .O4kjj virus will scan the entire computer for files. Then it encrypts all the files on that PC which normally include but not limited to video, audio, images, text documents, backup, archives, and so on.
Once done with the encryption method, .O4kjj File Virus will leave a ransom note on the infected PC to inform victims about the attack. That note will contain all the information about this dubious malware and the ransom demand. The message on that note clearly states that the only way to recover encrypted files is by purchasing the decryption key. Although this .O4kjj Ransomware claims to restore your files after paying the money, it is only a trick. Hackers are only intended in making illegal profits by cheating innocent victims.
What happened to your files
The ransomware infection has become a new reality these days. This dirty little malware can easily target your system and you won’t even know it. It will too late when you will ever realize that your computer is infected and you cannot access your files anymore. There are so many ways through which your PC can get infected by .O4kjj Virus File and you will only get to know about it when all is lost. This virus uses a very powerful military-grade cipher which is impossible to break without knowing the private key. That key is surely unique for every other computer and stored at a remote location, so there is no way to find it.
Once infecting your computer, .O4kjj Virus will change all your files and you will lose access to your private information. It adds its own extension to mark files as locked, and you will need the decryption key to unlock such files and that you can only get from hackers for a price. This is illegal and sure very painful for the victim’s but cybercriminals are making good money out of it. Hackers don’t give you so much time to look for help, they also try to discourage you by threatening to delete your file completely.
O4kjj Ransomware: Threat Analysis
Common ways of Ransomware Spreading
There are various ways through which malware like .O4kjj file virus infects your system. One of them is by opening spam emails and attachments without scanning for viruses first. Cybercriminals often send fake emails pretending to be some genuine company or service provider. Users don’t give a second thought before opening such emails and malware slip into the computer secretly. One thing you should know that all digital files like images, documents, pdf, .exe, etc. can carry infection.
.O4kjj Virus can also contaminate your computer when you click on misleading pop-up ads and banners that appear on your screen while browsing the Internet. These advertisements mostly redirect your browser to suspicious websites that often host malicious codes which can trigger the automatic download of malware on your PC. Avoid browsing porn or torrent sites and downloading pirated software. These are also very commonly used by hackers to spread threats like .O4kjj virus. We have created a list of safe practices that can help you protect your PC from further malware intrusion. Be sure to check those precautionary measures at the end of this article.
NEVER Pay Ransom Money
As I have already mentioned, do not pay ransom money to hackers. They are not intended to restore your files. No matter how tempted you are, first, you need to think it through. You don’t know hackers, payment is in BitCoin which cannot be traced, and after getting the money they don’t have any reason to decrypt your files. The only leverage they have on you is your files.Ransom Note “p3qn_HOW_TO_DECRYPT.txt” Contains Following Text Message:
Your network has been breached and all data were encrypted. Personal data, financial reports and important documents are ready to disclose. To decrypt all the data and to prevent exfiltrated files to be disclosed at you will need to purchase our decryption software. Please contact our sales department at: Login: Password: To get an access to .onion websites download and install Tor Browser at: hxxps://www.torproject.org/ (Tor Browser is not related to us) Follow the guidelines below to avoid losing your data: - Do not modify, rename or delete *.key.o4kjj files. Your data will be undecryptable. - Do not modify or rename encrypted files. You will lose them. - Do not report to the Police, FBI, etc. They don't care about your business. They simply won't allow you to pay. As a result you will lose everything. - Do not hire a recovery company. They can't decrypt without the key. They also don't care about your business. They believe that they are good negotiators, but it is not. They usually fail. So speak for yourself. - Do not reject to purchase. Exfiltrated files will be publicly disclosed.
Once you pay, creators of .O4kjj File Virus can leave you hanging. It’s better to use the backup to restore your files. If by any unfortunate reason you don’t have a backup or your backup files are also encrypted then still do not pay extortion. If you pay the ransom money to cybercriminals, there is no guarantee your files will get restored.
What to do after .O4kjj Virus infection
We strongly suggest you try to remove this virus. There is no way you can hope for a happy ending after paying money to hackers. If they give you a decryption key, then still virus is on your PC. It is highly possible that sometime later it will encrypt your files again using some other extension. So it is important that you use this removal guide to completely remove the .O4kjj File Virus from your computer. The Anti-malware tool suggested on this site can help you scan your PC for hidden threats and remove them all at once. You can alter restore your files through any Data Recovery Software.
How To Remove O4kjj Virus
O4kjj File Virus is a harmful and notorious threat. It will keep creating new problems in your PC, so it very important to delete this malware permanently. When this kind of malware invades your system, it may also bring other threats to the victimized system. It can do major damage to your computer in a very quick time. It may have already spread its copies at different locations on your system. Files related to this infection can have different names, so it will make it harder to detect.
We are going to discuss two possible ways to remove O4kjj Virus infection 1. Automatic Removal, 2. Manual Removal method. It’s better to have a complete diagnosis on the infected PC so that all the potential infections can easily be found and removed at once. You must clean your system properly and remove all the core files related to O4kjj Ransomware. The Automatic Removal process is fast, precise, and error free whereas the Manual Removal process is time-consuming and a slight mistake can corrupt the entire operating system. We advised you to take the help of both methods to completely eliminate the virus from your PC.
Automatic O4kjj Removal Guide
As you already know that, O4kjj Virus is a notorious and cunning malware that is not hard to remove easily by any user through manual means. This virus can keep coming back on the infected computer through files and shortcuts or settings that it has already created on your machine. Removing all those at once is the only way to get rid of this infection and stop it from getting on your system ever again.
So the best way to remove O4kjj effectively is to use a powerful Automatic Removal Tool and save your time and efforts. This software is a well-trusted and very powerful anti-malware program that can detect all hidden threats like Trojan, Ransomware, Worms, Spyware, Rootkits, and many others. It also provides 24X7 customer support and one-on-one Spyware HelpDesk support for Custom Malware removal. Advanced System Guard feature detects and removes threats in real-time. It has a very User-Friendly Interface and regular Malware updates make it most effective against the latest malware attacks.
How SpyHunter 5 Anti-Malware Works
- First, you need to click on the below download button to get the software.
- Then double-click on the installer you downloaded to install the program.
- Launch Anti-Malware application and Start Scan Now of your PC.
- The software will scan your PC for all hidden threats and viruses on your system.
- Click on the Next button to see results and delete O4kjj and other threats.
How To Recover Your Encrypted Files
Now all your files got encrypted by the .O4kjj Virus then you need to recover your data without paying ransom money to hackers. If your files are important then you must have created a backup and you can use that backup to recover your files. If you don’t have a backup or this virus has encrypted your backup files, then you are left to seek professional help.
We recommend you use powerful data recovery software to restore your files encrypted .O4kjj File Virus. It is a risk-free and smart way. You can just download the free version and scan your PC for files. There is a high probability that it can recover most of your files in a fraction of the amount that hackers are demanding. It is also needless to say that paying hackers will only motivate hackers to carry out more attacks.
- First, you need to download Data Recovery software on your PC.
- Install the program, launch it then select the Data type to recover, and click the Next button.
- Select the location from where you want to recover data and click the Scan button.
- After the scan, software will list all files, select them and click the Recover button.
Manual O4kjj Removal Guide
Start PC in safe mode with networking
- Press Windows Key + R buttons together on the keyboard.
- Type msconfig in the Run Box then click the OK button.
- Click on the Boot tab then the System configuration window will appear.
- Choose Safe Boot, check the network box, Click Apply, and press the OK button.
Kill Malicious Process From Task Manager
- Press Windows Key + R buttons together on the keyboard.
- Type taskmgr in Run Box and then click the OK button.
- Find O4kjj related or any malicious process.
- Now right-click on it then click End process.
How To Uninstall O4kjj from Windows PC
- First of all Press Windows Key + R buttons together.
- Type appwiz.cpl in the Run box and then click the OK button.
- Now Programs and Features windows will appear on the screen.
- Find and remove all O4kjj related or malicious programs.
Remove Virus related Windows Registry entries
- Press Windows Key + R buttons together on the keyboard.
- Type regedit in Run Box and then click the OK button.
- Registry Editor will open, then press CTRL +F buttons together.
- Now type O4kjj and then click on Find Next button.
- Find all the related entries and delete them one by one
Delete Virus related files from your PCWhen a threat gets on to a PC, it most likely creates some files at different locations on the system. These files are used to perform a specific action and also help malware in getting back to the computer once it’s removed. So you just need to find also delete all those files associated with this .O4kjj File Virus. For that follow the below instruction :
- Press Windows Key + R buttons together on the keyboard
- Type each of the following in Run Box and press the OK button
Remove O4kjj Virus via system restore
- Press Windows Key + R buttons together on the keyboard.
- Type cmd in Run Box and then click the OK button.
- Type cd restore and press Enter, then type rstrui.exe and press Enter.
- When the System Restore window opens on your computer screen click the Next button, then choose a System Restore point you have created in the past and click the Next button.
- Finally, click on the Yes button to start the system restoration process.
Note: This will only work if you have a restore point set on your PC or it will give an error message. Restoring the computer to a previous version may or may not remove .O4kjj File Virus. Most of the time, viruses just delete all the restore points. If this trick does not work for you then don’t get disappointed.
After restoring your computer, we recommend you run a thorough scan of the PC using a Powerful Anti-Malware program to detect and remove any hidden threats. In most cases, viruses may spread through any files outside of the C drive because system restoring only affect the C drive. There may be some Virus related files hiding your PC, and it never hurts to double-check.
Sometimes, system restore doesn’t work or viruses can just remove the restore points. As such you will probably have no other choice than to choose the Automatic Removal Process. It is the best and error-free method to find and remove threats from your computer. Additionally, you should also check some important malware prevention tips provided here in this guide to avoid similar virus attacks in the future.
Remove O4kjj Virus From MacOSIf you are a mac user, and your machine got infected by this nasty file-encrypting malware then you need to remove it as soon as possible. Although Mac systems are quite safe they still do get infected. So you can delete this infection using the below steps:
Stop Malicious Program From Activity Monitor
- First, you need to open Utilities folder on your Mac system.
- Find the Activity Monitor icon and double-click on it to open it.
- Find O4kjj related process, click the cross button from the upper left side corner to end task.
- A pop-up dialogue box will appear on the screen, click on the Force Quit button.
Remove Virus From Application Folder
- First, go to the Dock option (bottom of your screen) then click on Finder App.
- Now you have to open the Applications Folders to see all the programs.
- Find O4kjj or any other unwanted program then move it to Trash.
Remove O4kjj Virus Related Files From MacWhen any program is installed on your Mac, it creates several files on your system that support the functioning of that application. If you need to remove any virus from your Mac, then you need to delete all related files completely. These files could be found at :
- Application Support
- First of all press the Command+Shift+G buttons together on your keyboard.
- Now you can see Go To Folder option on your Mac screen.
- Type in /Library/LaunchAgents in the text field and click on Go button.
- Find and remove any O4kjj Virus related or malicious file.
Attention: If you are not tech-savvy, then it could be quite difficult to remove O4kjj File Virus manually from your Mac. The best way is to download SpyHunter Mac Anti-Malware and see if it can detect all hidden threats and viruses on your computer. It’s really super easy and you should give it a try.
How SpyHunter Mac Anti-Malware Works
- First, download the SpyHunter for Mac by clicking on the below button.
- Now go to the Download Folder from the Docs and Install the SpyHunter Anti-Malware For Mac.
- Launch the Program, and click on Start Scan Now button.
- Software will start running a a full scan of your mac instantly to look for any malware, virus, threats, malicious programs or security risk and so on.
- Finally you will see a list of malwares detected on your mac, now click on Next button to start the removal process.
Tips To Prevent .O4kjj Virus in Future
- Use a good anti-virus, be it a free version but don’t use cracked security programs.
- Make sure that your Windows firewall is active, so it can block upcoming threats.
- Keep your Windows/Mac OS and other programs updated to avoid vulnerabilities.
- Download updates only from official websites, don’t use suspicious sites.
- Never download and install pirated software, games, or illegal patches on your PC.
- Do not open spam emails from an unknown sender and scan all attachments before opening.
- Never download freeware third-party programs from unreliable sources or websites.
- Avoid connecting your PC to unsafe public Wi-Fi to protect your privacy.
- You can also use a VPN to spoof your connection and avoid malicious sites.
- Create a system restore point on your system for security purposes.
- Keep backup of all your important files to avoid data loss.
Frequently Asked Questions
What is .O4kjj File Virus Ransomware?
O4kjj Virus is a Ransomware infection that encrypts all the files on an infected PC such as Videos, photos, music, databases, documents, backup, etc. After that, it forces victims’ to pay huge ransom money for the decryption key. It adds its own “.O4kjj” extension to all your files and also ransom note “p3qn_HOW_TO_DECRYPT.txt” in all compromised folders.
How did O4kjj Virus infected my computer?
Hackers behind this threat can use several techniques to spread this malware. Usually, threats like O4kjj Virus intrude on your computer through Bundled Freeware programs, Spam emails, cracked software, illegal patches, fake software updates, clicking on suspicious links, and visiting porn or torrent sites.
How can I open “.O4kjj” files?
Unfortunately, you cannot open “.O4kjj” files without decrypting them first. All your files are encrypted and you need a decipher or decryption key to unlock those files before accessing them.
Are my files completely lost?
No, your files are still there on your computer but you simply don’t have access. O4kjj virus has encrypted your files and they can only be accessed after using a decrypting key for which hackers are demanding the ransom money.
How to decrypt .O4kjj Files?
There is no perfect O4kjj ransomware decryptor available currently which can restore all your files. But we have suggested a quite effective O4kjj File Recovery method in this guide which you can follow to recover your files. But don’t try to restore your data without removing the virus because it will keep encrypting your files.
How to Remove O4kjj Ransomware Virus?
It could be quite hard to remove this infection from computers, especially for non-technical users. We have shared several tips on removing this threat manually in this guide which you can use. If you have no prior experience with virus removal then feel free to Download O4kjj Ransomware Virus Removal Tool. It is the safest and easiest way to remove this infection from your PC.
Can I reinstall Windows to remove O4kjj virus and decrypt files?
If you will reinstall your Windows then it might remove the infection from your computer but you will not be able to recover your files. If you only format C Drive then the virus hiding in other drives will infect your system again. You have to use a powerful Anti-malware Tool to delete this virus and only then try to decrypt your files.
What to Do If nothing works?
If you are not able to recover your files by any method then still there is a lot you can do.
1. Make a backup of all your files on any External drive or cloud drive.
2. Remove O4kjj virus from your PC and move all infected files to an external drive.
3. Make sure there is no other infection hiding on your PC. (Scan twice with Anti-Malware).
4. Try to find any old backup of data and restore your files.
5. If you don’t have a backup, then contact your friends and family so they can check if they have any of your important files.
6. Check your smartphone or social media (Facebook, Twitter, Instagram) to find old pictures.
7. See if you can download some of your lost software, programs, games, movies, videos, audio from the web.
How to report this attack to Authorities?
If you are also a Victim of the O4kjj virus then you should report this cybercrime incident to legal authorities in your county. Here is the list of some of the official government websites for reporting Cybercrime activities:
United States – Guard Online
Australia – SCAMwatch
United Kingdom – Action Fraud
New Zealand – Consumer Affairs Scams
Canada – Canadian Anti-Fraud
Ireland – An Garda Síochána
India – National Cybercrime Reporting Portal
You can also search to find the Internet Crime Authority in your country. Meanwhile, it will not help you remove or restore your files in any way but it’s merely information to authorities. Once you register your complaint, authorities might look into and take preventive measures to stop further attacks. However, don’t get lured by third-party criminal reporting sites or fake technical support websites. They are more like to cheat you instead of helping you.