The new version of the popular among Russian users Unlock92 ransomware virus has been reported to be updated and now use the .kukaracha file extension which it adds to the files it encrypts. The Unlock92 ransomware then renders the files no longer openable by appending a file encryption cipher on them. This is done with the purpose to extort the average user for money in return for the files. Anyone who has been affected by the new version of Unlock92 should be careful and read the article to learn more about this threat and how to remove it and try to revert the files without having to pay the ransom payoff.
|The malware encrypts users files using a strong encryption algorithm, making direct decryption possible only via a unique decryption key available to the cyber-criminals.
|The user may witness ransom notes and “instructions” in a text file or a .tta file. Changed file names and the file-extension .kukaracha has been used.
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Unlock92 Ransomware – More Information
Distribution of Unlock92
To successfully infect the average user, the ransomware virus uses standard techniques – spam e-mails. The e-mails may resemble an order form an online retailer with your name on it, for example:
“Michael, you order has been confirmed. Please check the Invoice for reference below.
Amazon Sales Team”
The malicious file attachment, containing Unlock92 ransomware may contain several tools that allow the successful infection, for example:
- Malware obfuscator to conceal the malicious file from any firewalls or real-time shields of most widely used antivirus software.
- Exploit kit or a Trojan.downloader that connects to a remote host and downloads the ransom notes and the file-encryption program.
- File Joiners that combine the malicious file with macros of documents, like Microsoft Office or Adobe documents, to increase legitimacy.
Some of those tools used in combination guarantee that more users will be infected, given the spam e-mail message to be convincing.
After the user opens the malicious file, multiple executable files of different types and having different names may be dropped In key Windows folders, for example:
Unlock92 Ransomware – Post-Infection Analysis
After having infected the user, Unlock92 ransomware may initiate a procedure to modify the registry entries of the infected computer. Amongst the registry keys affected by this virus, may be a lot of subkeys, but the primary ones which Unlock92 might attack are the Run and RunOnce subkeys:
These registry keys may contain values with data added in them, which make the executable that encrypts files of Unlock92 to run when Windows starts up.
After this executable is ran, it may begin to encrypt user files. TO perform this procedure, the virus may execute a .bin type of file which is pre-programmed to hunt for variety of file often used file types to cipher, just like the older verison of Unlock92, using the .CCCRRRPPP.: and .CRRRT extensions:
→ .psd, .jpeg, .docx, .doc, .arj, .tar, .7z, .rar, .zip, .tif, .jpg, .ai, .bmp, .png, .xlsx, .pptx, .accdb, .mdb, .rtf, .odt, .ods, .cd, .ldf, .mdf, .max, .dbf, .epf, .1cd, .md, .db, .pdf, .ppt, .xls, .cdr, .odb, .odg
After the encryption, this variant of Unlock92, adds the interesting file extension .kukaracha to the encoded files, making them look like the following:
In addition to this, Unlock92 ransomware may have new features added to it, such as the ability to destroy any backups, more specifically volume shadow copies on the compromised computer.
The virus may also drop two other files – a keynote.tta file and a .txt file which contains the ransom note and is most likely in Cyrillic.
Remove Unlock92 Ransomware and Restore .kukaracha Files
If you have been affected by this malware, the first action you should take is to disconnect your computer and copy the encrypted files to a flash drive or other external device. From there you may safely proceed to the removal of Unlock92 ransomware from your computer.
To remove Unlock92, bear in mind that you should follow the instructions below. In case you do not have the experience in manually removing ransomware, we advise you to use the help of an advanced anti-malware program which will take care of this for you.
After having removed Unlock 92 ransomware, you may use the alternative methods for restoring files mentioned in step “2.Restore Files Encrypted by Unlock92” below. They are not 100% guarantee you will restore the files, but are a good temporary solution until a real decryption is released, which is why we advise you to backup your data and try it on copies of the encrypted files.
What is Unlock92 Ransomware?
Unlock92 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 Unlock92 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 Unlock92 Infect?
Via several ways.Unlock92 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 Unlock92 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 .Unlock92 files?
You can't without a decryptor. At this point, the .Unlock92 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 .Unlock92 files successfully, then do not despair, because this virus is still new.
Can I Restore ".Unlock92" Files?
Yes, sometimes files can be restored. We have suggested several file recovery methods that could work if you want to restore .Unlock92 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 Unlock92 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 Unlock92 ransomware and then remove it without causing any additional harm to your important .Unlock92 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 Unlock92 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.
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 Unlock92 Research
The content we publish on SensorsTechForum.com, this Unlock92 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.
To better understand the ransomware threat, please refer to the following articles which provide knowledgeable details.
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