If your files have been encrypted, we accept the challenge of analyzing your case.

Khonsari Ransomware

The Khonsari ransomware was the first group to exploit known Apache Log4j vulnerabilities (CVE-2021-44228 and CVE-2021-45046), the group has focused its attacks on Windows servers that have not had Log4j updated.

The group’s first registration occurred in December 2021, which all indicates that the group was created to directly exploit Apache Log4j vulnerabilities, but this may be just the beginning, the group may broaden its scope.

Unlike groups that use RaaS tactics, Khonsari is a closed and exclusive group, which shows that their attacks are targeted at specific companies.

The malware is relatively simple and small, it weighs only 12 KB, this makes it virtually unnoticeable for antivirus, the group acts only with encryption and there is no file theft.

The group uses AES 128 encryption, and interestingly the decryption key is also encrypted, but RSA encryption is used.

The key stays in the ransom note that is opened automatically after encrypting files, the .khonsari extension is added to all encrypted files.

In case the note is deleted, the files cannot be decrypted as the key was deleted along with the note.

If the decryption key is deleted, only a company that specialises in recovering files encrypted by ransomware can recover the files.

The best defence against Khonsari ransomware is to keep Log4j up to date.

Khonsari Ransomware

Recover Files Encrypted by Khonsari Ransomware

Recovery of files encrypted by Khonsari ransomware is possible even without the decryption key, Digital Recovery is capable of it.

With over two decades in the data recovery market, we have developed the expertise to perform in the most drastic data loss scenarios, which today boils down to data loss by ransomware attack.

We can recover encrypted files on HDDs, SSDs, Database, Storages (NAS, DAS, SAN), RAID Systems, Servers, Virtual Machines, among others.

All our processes are exclusive and customized for each client, during the whole process the client will be in contact with one of our specialists.

Our processes were developed based on GDPR (General Data Protection Regulation) and we provide all our customers with the confidentiality agreement (NDA).

Contact us and start the recovery process right now.

Ransomware Recovery FAQ

Every day, ransomware attacks get better and better. After a successful attack attempt, ransomware quickly maps the user’s most important files to begin encryption. Microsoft Office files, databases, PDFs and design are among its main targets.
Ransomware is designed to go unnoticed, so it can disable all system defences without being noticed and start the process of encrypting files. Even if ransomware goes unnoticed by the system, it can be noticed by the user, as it uses system resources to perform the encryption, which can slow down the system. Ransomware also changes file extensions. So look out for these signs: slowing down the system and adding extensions to files. To find out more, talk to our experts.
Yes, this is possible. You can restart the computer in safe mode, which will limit the action of the ransomware since the system resources will be locked. You can also disconnect the computer from the Internet, which can interrupt the hackers’ connection to your system, it should be noted that there are ransomwares that work even without being connected to the Internet. You can also run diagnostics to identify threats with your antivirus software, the vast majority of antivirus software have this function. But there are cases where the encryption was interrupted by the user, some files had already been affected and this caused an error in the encryption and the hackers could not restore the files, even with the decryption key. In these cases, only a data recovery company, such as Digital Recovery, can recover the files. To find out more, talk to our experts.
Yes, the attacks mainly take place on holidays and weekends, in the early hours of the morning. These days are chosen because there are not many active users on the system, making it impossible to discover the attack before the encryption is complete. To find out more, talk to our experts.
The vast majority of ransomware uses RSA [Rivest-Shamir-Adleman] -2048 and AES [Advanced Encryption Standard] encryption. To find out more, talk to our experts.
First of all, do not pay the ransom. No matter what the hackers say, there is no guarantee that the decryption key will actually be released after the ransom is paid. The first thing to do is to inform the authorities about the attack. Governments have specialised cybercrime departments that will investigate the attack. Next, check if your backups have been affected, if so, only a specialist data recovery company can recover your files, this is the next step. Contact Digital Recovery who will assist you in the full recovery of your files. To find out more, talk to our experts.
After contacting us and sending the affected media, we will diagnose the device to verify the extent of the damage caused by the ransomware, which will allow us to predict the duration of the process and provide the client with a budget. Once the budget is approved by the client, we begin the recovery process, for which we have proprietary software that can, with the help of our specialists, reconstruct the data. If the client opts for remote recovery, instead of sending us the media, they will send the encrypted files to a virtual environment, totally secure, so that we can access them. At the end of the process, we will perform a double check so that the customer can verify the integrity of the recovered files. Payment is only made once the files have been delivered and validated by the client. To find out more, talk to our experts.
Redação Digital Recovery
Redação Digital Recovery
Team Digital Recovery is made up of data recovery specialists who, in a simple way, aim to bring information about the latest technologies on the market, as well as informing about our ability to act in the most complex scenarios of data loss.
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