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What is ATCK Ransomware

ATCK Ransomware is a malicious software variant that encrypts files on infected computers, rendering them inaccessible to users. This ransomware is part of the Dharma family, known for its damaging capabilities and widespread impact. This article provides an in-depth look at how ATCK ransomware operates, including its infection methods, encryption process, ransom note details, and potential recovery options. Upon infection, ATCK ransomware encrypts files and modifies their filenames significantly. It appends the victim’s unique ID, the attacker’s email address, and the .ATCK extension to each encrypted file’s name. For instance, a file named example.jpg would be renamed to{random-ID}.[].ATCK after encryption. This renaming scheme not only signifies the file has been encrypted but also provides the victim with contact information for the ransom negotiation. ATCK ransomware delivers its ransom demands through two primary methods: a text file named info.txt and a pop-up window. Both notes inform the victim that their files have been encrypted and offer a way to restore them through contact with the attackers via provided email addresses ( or The ransom notes emphasize that attempting to decrypt files with third-party software could lead to permanent data loss, and they offer free decryption of a few files as proof that they can reverse the encryption.

Pop-up windowinfo.txt
All your files have been encrypted!
Don't worry, you can return all your files!
If you want to restore them, write to the mail: YOUR ID -
If you have not answered by mail within 12 hours, write to us by another
Free decryption as guarantee
Before paying you can send us up to 3 files for free decryption. The total size of files must be less than 3Mb (non archived), and files should not contain valuable information. (databases,backups, large excel sheets, etc.)
How to obtain Bitcoins
Also you can find other places to buy Bitcoins and beginners guide here:
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.
all your data has been locked us
You want to return?
write email or

As of the latest information, there are no guaranteed decryption tools available for ATCK ransomware that can universally decrypt files without the necessary decryption keys, which are held by the attackers. The complexity of the encryption method used by the Dharma family makes creating such tools challenging without specific vulnerabilities in the ransomware’s algorithm. Recovering files encrypted by ATCK ransomware involves a few potential approaches, though none guarantee success without the decryption key:

Restore from Backups: The most reliable method to recover your data is to restore from backups that were not connected to the network at the time of the infection.
Seek Professional Help: Consulting with cybersecurity professionals who specialize in ransomware recovery may provide additional options or negotiation strategies with the attackers.
Monitor for Decryption Tools: Occasionally, new decryption tools are developed and made available on platforms like No More Ransom. Victims should monitor these resources in case a viable decryption tool is released.

How ATCK Ransomware infects computers

ATCK Ransomware typically enters systems through compromised email attachments, malicious downloads, or vulnerabilities in software. Once inside the system, it executes a payload that begins the process of file encryption. Preventing an ATCK ransomware infection involves standard cybersecurity practices:

  • Avoid opening attachments or clicking on links from unknown sources.
  • Keep software and operating systems updated to patch vulnerabilities.
  • Use reputable antivirus software and conduct regular scans.
  • Educate users about the risks of phishing and other common attack vectors.
  1. Download ATCK Ransomware Removal Tool
  2. Get decryption tool for .ATCK 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 ATCK Ransomware

Download Removal Tool

Download Removal Tool

To remove ATCK Ransomware completely, we recommend you to use SpyHunter 5 from EnigmaSoft Limited. It detects and removes all files, folders, and registry keys of ATCK Ransomware. The trial version of SpyHunter 5 offers virus scan and 1-time removal for FREE.

Alternative Removal Tool

Download Norton Antivirus

To remove ATCK Ransomware completely, we recommend you to use Norton Antivirus from Symantec. It detects and removes all files, folders, and registry keys of ATCK Ransomware and prevents future infections by similar viruses.

ATCK Ransomware files:

Pop-up window

ATCK Ransomware registry keys:

no information

How to decrypt and restore .ATCK files

Use automated decryptors

Download Kaspersky RakhniDecryptor

kaspersky dharma ransomware decryptor

Use the following tool from Kaspersky called Rakhni Decryptor, that can decrypt .ATCK 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 .ATCK 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 ATCK 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 .ATCK files

stellar data recovery professional

  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 ATCK 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

idrive backup

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. ATCK 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

mailwasher pro

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
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James Kramer
Hello, I'm James. My website, a culmination of a decade's journey in the realms of computer troubleshooting, software testing, and development. My mission here is to offer you comprehensive, yet user-friendly guides across a spectrum of topics in this niche. Should you encounter any challenges with the software or the methodologies I endorse, please know that I am readily accessible for assistance. For any inquiries or further communication, feel free to reach out through the 'Contacts' page. Your journey towards seamless computing starts here