FOX Ransomware

FOX is a dangerous ransomware variant that belongs to the notorious Dharma family. This ransomware encrypts your files and leaves you with a ransom note demanding payment in exchange for the decryption key. In this article, we will delve into the specifics of FOX ransomware, summarize its threat details in an easy-to-read table, and provide a step-by-step guide on how to remove it using SpyHunter. We will also outline preventive measures to help avoid future infections.

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Overview of FOX Ransomware

FOX ransomware operates by scanning a victim’s system and encrypting files—renaming them with a specific pattern that includes the victim’s ID, a designated email address, and the extension “.SCRT”. For instance, a file originally named 1.jpg may be renamed to something like 1.jpg.id-9ECFA84E.[secretuser@tuta.io].SCRT. This clear signature of infection not only renders files inaccessible but also serves as a marker of the ransomware’s impact.

The attackers behind FOX provide victims with a ransom note both via a pop-up message and an “info.txt” file, instructing them to contact the attackers through one of two email addresses: secretuser@tuta.io or secretuser@mailum.com. The note reassures victims that file recovery is possible if proper communication is initiated, but waiting longer than 24 hours will force them to use the alternative email address.

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Detailed Threat Analysis

Below is a summary table outlining the crucial details of the FOX ransomware threat:

Detail	Information
Threat Type	Ransomware, Crypto Virus, Files Locker
Encrypted File Extension	.SCRT
Ransom Note File Name	info.txt (along with a pop-up message)
Associated Email Addresses	secretuser@tuta.io, secretuser@mailum.com
Detection Names	Avast (Win32:RansomX-gen [Ransom]), Combo Cleaner (Trojan.Ransom.Crysis.E), ESET-NOD32 (A Variant Of Win32/Filecoder.Crysis.P), Kaspersky (Trojan-Ransom.Win32.Crusis.to), Microsoft (Ransom:Win32/Wadhrama!pz)
Symptoms of Infection	– Inability to open files due to encryption – Files having a new extension (e.g., my.docx becomes my.docx.id-9ECFA84E.[secretuser@tuta.io].SCRT) – Display of a ransom note on screen
Damage	Complete encryption of files, which prevents access without a decryption key. Potential installation of additional malware, including password stealers, leading to further system compromise.
Distribution Methods	– Exploiting vulnerable Remote Desktop Protocol (RDP) services via brute force attacks – Deceptive email attachments and malicious links – Pirated software and torrent websites – Malicious advertisements and technical support scams
Danger Level	High – FOX ransomware can cause irreparable data loss if victims do not have reliable backups or fall prey to paying the ransom.

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How FOX Ransomware Operates

Encryption Process and File Renaming

Once FOX ransomware infects a system, it starts encrypting files located on local drives as well as those on network shares. A distinctive characteristic is its method of renaming files. For example:

• Before Encryption: 1.jpg
• After Encryption: 1.jpg.id-9ECFA84E.[secretuser@tuta.io].SCRT

This renaming convention not only marks the file as infected but also provides a clue regarding the ransomware’s identity and the attacker’s contact information.

Ransom Note Details

FOX ransomware delivers its demands through two primary methods: a pop-up message and an “info.txt” file. Below is the complete text as provided by the ransomware:

Pop-up Message:

FOX
YOUR FILES ARE ENCRYPTED
Don't worry, you can return all your files!
If you want to restore them, write to the mail: secretuser@tuta.io YOUR ID -
If you have not answered by mail within 24 hours, write to us by another mail: secretuser@mailum.com
ATTENTION
FOX does not recommend contacting agent to help decode the data

Text from “info.txt”:

You want to return?
write email secretuser@tuta.io or secretuser@mailum.com

This clear instruction forces the victim into a situation where they feel pressured to pay the ransom in hopes of regaining access to their encrypted files. It is critical to note that paying the ransom does not guarantee file recovery, and it may encourage further criminal activity.

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Comprehensive Guide to Removing FOX Ransomware

Removing ransomware like FOX can be challenging. However, SpyHunter—a reputable malware removal tool—can help identify and eliminate the malicious files and registry modifications introduced by FOX. Follow these detailed steps to remove FOX ransomware:

Step 1: Preparation

• Disconnect from the Internet: To prevent further communication with the ransomware’s command-and-control servers, disconnect your computer from the internet immediately.
• Back Up Important Data: If possible, make backups of any unencrypted files to an external drive or secure cloud storage. Ensure that these backups are isolated and scanned for malware before use.

Step 2: Boot into Safe Mode

Booting into Safe Mode limits the number of active processes and can prevent the ransomware from interfering with removal efforts.

• For Windows:
  1. Restart your computer.
  2. Press F8 (or use the appropriate key for your system) before Windows starts loading.
  3. Select Safe Mode with Networking.

• Note: If your system does not allow you to access Safe Mode easily, consult your computer manufacturer’s support page for instructions.

Step 3: Install and Update SpyHunter

• Download SpyHunter: Download the latest version of the software.
• Update SpyHunter: After installation, run an update to ensure that the software has the most current threat definitions.

Step 4: Run a Full System Scan

• Initiate a Scan: Open SpyHunter and select the option to perform a comprehensive, full-system scan. This process might take some time, depending on the size and speed of your hard drive.
• Review the Results: Once the scan is complete, SpyHunter will list all detected threats. Look specifically for entries related to FOX ransomware or any other suspicious files.

Step 5: Quarantine and Remove Detected Threats

• Quarantine: Move the detected FOX ransomware files and any related malicious components to quarantine.
• Removal: Use SpyHunter’s removal tools to delete the quarantined items from your system permanently. Follow the on-screen prompts carefully.
• Registry Cleanup: SpyHunter will also attempt to remove any malicious registry entries created by FOX. It is crucial to allow this process to ensure no remnants remain.

Step 6: Reboot and Verify

• Restart Your Computer: After the removal process is complete, reboot your system normally.
• Verify: Check that the previously encrypted files are no longer being processed by any malware. Although decryption is not possible without the decryption key, ensuring that the ransomware process has been removed is essential for system recovery and to prevent further spread.

Step 7: Seek Professional Help if Needed

If you are unsure about any of the steps or if the removal process does not resolve the issue, consider seeking assistance from professional cybersecurity services. They can provide further diagnostics and remediation.

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Preventive Measures Against Future Infections

Preventing ransomware infections like FOX is as important as knowing how to remove them. Here are several measures you can take to protect your system:

Regular Backups

• Maintain Regular Backups: Regularly back up your critical data on an external drive or a secure cloud service. Ensure that backups are performed automatically and are kept disconnected from your main system when not in use.
• Test Your Backups: Periodically verify that your backups are complete and can be restored successfully.

Strengthen RDP Security

• Disable Unnecessary RDP Services: If you do not require Remote Desktop Protocol (RDP) access, disable it entirely.
• Use Strong Passwords: For systems that need RDP, use complex, unique passwords and consider implementing multi-factor authentication (MFA).
• Firewall Configuration: Ensure that your firewall is configured to restrict RDP access to trusted IP addresses only.

Update Software and Operating Systems

• Install Updates Promptly: Regularly update your operating system, software applications, and antivirus programs. Many ransomware variants, including FOX, exploit vulnerabilities in outdated software.
• Enable Automatic Updates: Where possible, enable automatic updates to ensure you are protected against the latest threats.

Educate and Train Users

• Email and Web Security: Train yourself and your staff to recognize phishing emails, malicious attachments, and deceptive download links. Awareness is one of the best defenses against ransomware.
• Security Policies: Implement robust security policies and procedures for handling email attachments and downloads, especially from unknown or untrusted sources.

Use Comprehensive Security Software

• Antivirus and Anti-Malware Tools: Use reputable antivirus and anti-malware tools that are regularly updated. Tools like SpyHunter can provide an additional layer of security.
• Behavioral Analysis: Consider security solutions that include behavioral analysis to detect ransomware activity based on suspicious system behavior.

Network Segmentation

• Isolate Critical Data: Segment your network so that if one part is compromised, the ransomware cannot spread easily to critical systems or backups.
• Limit Privileges: Restrict user privileges to only what is necessary for their role, minimizing the potential impact of a ransomware infection.

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Conclusion

FOX ransomware is a clear and present danger that leverages advanced encryption techniques to lock users out of their own data. With its roots in the Dharma ransomware family, FOX not only encrypts files with the .SCRT extension but also displays aggressive ransom notes instructing victims to contact the attackers via secretuser@tuta.io or secretuser@mailum.com. The severity of this threat is underscored by its distribution methods—ranging from vulnerable RDP services to phishing emails—and its ability to install additional malware on infected systems.

By understanding the specifics of FOX ransomware, utilizing effective removal tools like SpyHunter, and implementing robust preventive measures, you can significantly reduce the risk of infection and safeguard your valuable data. Remember, prevention is always better than cure, and regular system backups, strong security protocols, and continuous vigilance are your best defenses against ransomware threats like FOX.