How to remove Arachna Ransomware and decrypt .Arachna files

What is Arachna Ransomware

Arachna Ransomware is a malicious software variant that specifically targets users by encrypting their files and demanding a ransom for their decryption. Upon infiltrating a system, it appends the file extension .Arachna to the victim’s files, significantly modifying their names to include the victim’s ID and an email address, along with the new extension. For instance, a file named photo.jpg might be transformed into photo.jpg[id-0458FGO9].[Arachna_Recovery@firemail.de].Arachna. The encryption used by Arachna is typically robust, leaving minimal opportunities for decryption without the attackers’ tools. After encryption, the ransomware generates ransom notes in the form of Restore-Files-Guide.txt files and pop-up windows, explicitly instructing victims to contact the attackers via email. The notes ominously warn that failure to comply and pay the demanded Bitcoin ransom could result in permanent data loss, thus pressuring victims into cooperation.

Unfortunately, the decryption of .Arachna files remains a complex challenge, as there are no known universal decryption tools currently available to recover data encrypted by this ransomware. Victims are strongly advised against paying the ransom since there is no guarantee that the attackers will provide the necessary decryption keys even after payment. Instead, users are encouraged to seek assistance from cybersecurity experts and explore possible recovery methods that might be available through reputable sources. While independent decryption remains elusive, individuals who have maintained up-to-date backups prior to infection can restore their files without conceding to the cybercriminals’ demands. Maintaining data backups and implementing robust security measures are vital defenses against such devastating ransomware threats, thereby minimizing potential data loss and financial impact.

How Arachna Ransomware infects computers

Arachna Ransomware infiltrates computers primarily through deceptive tactics that prey on user vulnerabilities. Cybercriminals often distribute this malware via phishing emails that contain malicious attachments or links designed to look legitimate. Once a user opens these attachments or clicks on the links, the ransomware silently installs itself and begins the encryption process. Additionally, Arachna can spread through compromised websites, malicious advertisements, and downloads from unreliable sources, such as peer-to-peer networks and third-party download sites. Exploiting software vulnerabilities is another common method, where attackers take advantage of outdated systems and applications to gain unauthorized access. To mitigate the risk of infection, it is crucial to maintain updated security software, practice cautious browsing habits, and regularly back up important data.

1. Download Arachna Ransomware Removal Tool
2. Get decryption tool for .Arachna files
3. Recover encrypted files with Stellar Data Recovery Professional
4. Restore encrypted files with Windows Previous Versions
5. Restore files with Shadow Explorer
6. How to protect from threats like Arachna Ransomware

Arachna Ransomware files:


Restore-Files-Guide.txt
{randomname}.exe


Arachna Ransomware registry keys:

no information

How to decrypt and restore .Arachna files

Use automated decryptors

Download Kaspersky RakhniDecryptor

Use the following tool from Kaspersky called Rakhni Decryptor, that can decrypt .Arachna files. Download it here:

Download RakhniDecryptor

There is no purpose to pay the ransom because there is no guarantee you will receive the key, but you will put your bank credentials at risk.

Dr.Web Rescue Pack

Famous antivirus vendor Dr. Web provides free decryption service for the owners of its products: Dr.Web Security Space or Dr.Web Enterprise Security Suite. Other users can ask for help in the decryption of .Arachna files by uploading samples to Dr. Web Ransomware Decryption Service. Analyzing files will be performed free of charge and if files are decryptable, all you need to do is purchase a 2-year license of Dr.Web Security Space worth $120 or less. Otherwise, you don’t have to pay.

If you are infected with Arachna Ransomware and removed from your computer, you can try to decrypt your files. Antivirus vendors and individuals create free decryptors for some crypto-lockers. To attempt to decrypt them manually, you can do the following:

Use Stellar Data Recovery Professional to restore .Arachna files

1. Download Stellar Data Recovery Professional.
2. Click Recover Data button.
3. Select the type of files you want to restore and click Next button.
4. Choose the location where you would like to restore files from and click Scan button.
5. Preview found files, choose ones you will restore and click Recover.

Download Stellar Data Recovery Professional

Using Windows Previous Versions option:

1. Right-click on infected file and choose Properties.
2. Select Previous Versions tab.
3. Choose a particular version of the file and click Copy.
4. To restore the selected file and replace the existing one, click on the Restore button.
5. In case there are no items in the list, choose an alternative method.

Using Shadow Explorer:

1. Download Shadow Explorer program.
2. Run it, and you will see a screen listing of all the drives and the dates that shadow copy was created.
3. Select the drive and date that you want to restore from.
4. Right-click on a folder name and select Export.
5. In case there are no other dates in the list, choose an alternative method.

If you are using Dropbox:

1. Login to the Dropbox website and go to the folder that contains encrypted files.
2. Right-click on the encrypted file and select Previous Versions.
3. Select the version of the file you wish to restore and click on the Restore button.

How to protect computer from viruses, like Arachna Ransomware, in future

1. Get special anti-ransomware software

Use ZoneAlarm Anti-Ransomware

Famous antivirus brand ZoneAlarm by Check Point released a comprehensive tool, that will help you with active anti-ransomware protection, as an additional shield to your current protection. The tool provides Zero-Day protection against ransomware and allows you to recover files. ZoneAlarm Anti-Ransomware is compatible with all other antiviruses, firewalls, and security software except ZoneAlarm Extreme (already shipped with ZoneAlarm Anti-Ransomware) or Check Point Endpoint products. The killer features of this application are: automatic file recovery, overwrite protection that instantly and automatically recovers any encrypted files, file protection that detects and blocks even unknown encryptors.

Download ZoneAlarm Anti-Ransomware

2. Back up your files

As an additional way to save your files, we recommend online backup. Local storage, such as hard drives, SSDs, flash drives, or remote network storage can be instantly infected by the virus once plugged in or connected to. Arachna Ransomware uses some techniques to exploit this. One of the best services and programs for easy automatic online backup is iDrive. It has the most profitable terms and a simple interface. You can read more about iDrive cloud backup and storage here.

3. Do not open spam e-mails and protect your mailbox

Malicious attachments to spam or phishing e-mails are the most popular method of ransomware distribution. Using spam filters and creating anti-spam rules is good practice. One of the world leaders in anti-spam protection is MailWasher Pro. It works with various desktop applications and provides a very high level of anti-spam protection.

Download MailWasher Pro