In this article, you will find more information about .4k files virus as well as a step-by-step guide on how to remove malicious files from the infected system and how to potentially recover files encrypted by this ransomware.
The .4k files virus is data locker ransomware that plagues essential system settings, encrypts valuable files and then demands a ransom payment. Its name is a derivative of one of the extensions it appends to the name of each corrupted file. In addition, the ransomware is associated with a ransom message file that urges you to contact hackers for more information about ransom payment. If you are a victim of this ransomware, you should consider the immediate removal of all malicious files from your infected system.
|Name||.4k Files Virus|
|Short Description||A data locker ransomware designed to plague computer system settings, utilize strong cihper algorithm and encrypt valuable files.|
|Symptoms||Important files are locked and renamed with long string of extensions. Ransom message insists on payment for a decryption program.|
|Distribution Method||Spam Emails, Email Attachments|
|Detection Tool|| See If Your System Has Been Affected by .4k Files Virus |
Malware Removal Tool
|User Experience||Join Our Forum to Discuss .4k Files Virus.|
|Data Recovery Tool||Windows Data Recovery by Stellar Phoenix Notice! This product scans your drive sectors to recover lost files and it may not recover 100% of the encrypted files, but only few of them, depending on the situation and whether or not you have reformatted your drive.|
.4k Files Virus (Dharma) – Distribution and Impact
The so-called .4k files virus is yet another iteration of Dharma ransomware. It infects computer systems with the main goal to reach valuable personal files and encode them with strong cipher algorithm. Currently, samples of Dharama .4k are lurking on the web.
There are several common spread techniques that may be used for the delivery of .cry ransomware on targeted operating systems.
The most probable one is malspam. It enables hackers to deliver malicious code on users’ devices with the help of massive email campaigns. Spam emails which are part of attack campaigns usually contain one or more of the following components:
- A link to compromised web page that is set to download and execute infection files directly on the PC. The URL address to this page may be presented in the form of an in-text link, banner, image, button or full URL address.
- A malicious file attachment that is presented as legitimate document by the text message. It could be uploaded in a .rar or .zip archive. Such a file could be set to evade active security measures and trick you into running the ransomware on your PC.
Once started on a target machine the payload file of .4k files virus triggers a long sequence of malicious operations. During the attack .4k virus accesses some essential system components and stop certain Windows processes. By doing this, it could prevent being detected by any currently running security measures and continue with the corruption of other system components.
There is no doubt that all initial attack stages are perfomred in order to support the completion of the main goal of Dharma .4k ransomware – corruption of target types of files stored on the compromised computer. To complete its main goal, the ransomware performs an encryption process. During this process, it activates a built-in cipher module that transforms the code of all target files with the help of sophisticated cipher algorithm, probably RSA. Since the threat is designed to corrupt files that are likely to store important personal data, an infection with it could prevent you from accessing all your:
- Audio files
- Video files
- Document files
- Image files
- Backup files
- Banking credentials, etc
Files encrypted by Dhrama .4k virus can be recognized by the specific extension .4k appended to their names. In addition, you are likely to see two other extensions – an ID number and an email address.
The final attack stage could be recognized by a load of a ransom message on the computer screen. This message reads:
All FILES ENCRYPTED “RSA1024”
All YOUR FILES HAVE BEEN ENCRYPTED!!! IF YOU WANT TO RESTORE THEM, WRITE US TO THE E-MAIL firstname.lastname@example.org
IN THE LETTER WRITE YOUR ID, YOUR ID ********
IF YOU ARE NOT ANSWERED, WRITE TO EMAIL: email@example.com
YOUR SECRET KEY WILL BE STORED ON A SERVER 7 DAYS, AFTER 7 DAYS IT MAY BE OVERWRITTEN BY OTHER KEYS, DON’T PULL TIME, WAITING YOUR EMAIL
FREE DECRYPTION FOR PROOF
You can send us up to 1 file for free decryption. The total size of files must be less than 1Mb (non archived), and files should not contain valuable information. (databases,backups, large excel sheets, etc.)
When you make sure of decryption possibility transfer the money to our bitcoin wallet. As soon as we receive the money we will send you:
1. Decryption program.
2. Detailed instruction for decryption.
3. And individual keys for decrypting your files.
Do not rename encrypted files.
Do not try to decrypt your data using third party software, it may cause permanent data loss.
Decryption of your files with the help of third parties may cause increased price (they add their fee to our) or you can become a victim of a scam.
The purpose of this message is to convince you to contact hackers at firstname.lastname@example.org so that you could receive more details on ransom payment process. Beware that they could fool you into paying for a broken decryption tool that cannot recover locked files or even skip answering you once you transfer them the ransom. For the sake of your security, we advise you to avoid contacting hackers and attempt to restore your PC and data with the help of the guide that follows.
Remove .4k Files Virus and Attempt to Restore Data
The so-called .4k files virus is a threat with highly complex code designed to corrupt both system settings and valuable data. So the only way to use your infected system in a secure manner again is to remove all malicious files and objects created by the ransomware. For the purpose, you could use our removal guide that reveals how to clean and secure your system step by step. In addition, in the guide, you will find several alternative data recovery approaches that may be helpful in attempting to restore files encrypted by .4k ransomware. We remind you to back up all encrypted files to an external drive before the recovery process.