What is Interlock Ransomware?

Ransomware is a malicious form of software designed to block access to a computer system or encrypt files until a ransom is paid. It is one of the most common and damaging types of cyberattacks in recent years. The attacker typically demands payment in cryptocurrency, such as Bitcoin, in exchange for the decryption key that will unlock the files. Ransomware can infiltrate systems through various means, from phishing emails to malicious websites, and it poses a severe threat to both personal and business environments. In this article, we will explore one particular ransomware threat—Interlock Ransomware—and provide an in-depth guide on identifying, removing, and protecting yourself from it.

What is Interlock Ransomware?

Interlock Ransomware is a dangerous and highly disruptive form of malware that encrypts files on an infected system and demands a ransom payment for decryption. It is part of a growing wave of ransomware strains that focus on locking users out of their files and forcing them to pay to regain access.

How Does Interlock Ransomware Get Installed?

Like many ransomware variants, Interlock typically spreads through phishing emails containing malicious attachments or links. These attachments may appear to be harmless documents, invoices, or notifications from well-known services. When opened, they run scripts or exploit vulnerabilities in outdated software to deliver the ransomware payload to the system.

Once the ransomware is installed on the device, it silently runs in the background, looking for files to encrypt. Interlock often targets important documents, photos, videos, and other personal files, rendering them inaccessible without the decryption key.

What Actions Does Interlock Perform After Installation?

Upon successful installation, Interlock Ransomware begins its encryption process. It uses sophisticated encryption algorithms to lock files, making them unreadable to the user. The malware appends a specific file extension to the encrypted files, making them easily identifiable. A common extension used by Interlock is .interlock, indicating that the files have been locked by this specific strain of ransomware.

Additionally, Interlock might alter system settings or disable security software to make detection and removal more difficult. The ransomware may also create persistence mechanisms to ensure it remains active even after the system is rebooted.

Consequences of Interlock Ransomware

The most immediate consequence of Interlock Ransomware is the loss of access to important files, which could include personal documents, work-related files, and even system data. If the victim has not backed up their files, they could face significant data loss. Additionally, the ransom demands—usually in the form of cryptocurrency—can cause financial strain if the victim decides to comply.

Paying the ransom does not always guarantee the attacker will honor their promise to decrypt the files, and victims may still end up losing their data and money. For businesses, the impact is even more severe, with the potential for lost productivity, damaged reputation, and the risk of exposing sensitive customer data.

Ransom Note Left by Interlock Ransomware

After encrypting the files, Interlock Ransomware leaves a ransom note on the infected system. This note typically provides instructions on how to pay the ransom, often demanding payment in cryptocurrency like Bitcoin. It may also warn that failure to pay within a certain timeframe will result in the loss of the decryption key and permanent file encryption.

The ransom note,!__README__!.txt, might look something like this:

Text presented in this message:

INTERLOCK - CRITICAL SECURITY ALERT

To Whom It May Concern,
Your organization has experienced a serious security breach. Immediate action is required to mitigate further risks. Here are the details:

THE CURRENT SITUATION
- Your systems have been infiltrated by unauthorized entities.
- Key files have been encrypted and are now inaccessible to you.
- Sensitive data has been extracted and is in our possession.

WHAT YOU NEED TO DO NOW
1. Contact us via our secure, anonymous platform listed below.
2. Follow all instructions to recover your encrypted data.

Access Point: -
Use your unique Company ID: -

DO NOT ATTEMPT:
- File alterations: Renaming, moving, or tampering with files will lead to irreversible damage.
- Third-party software: Using any recovery tools will corrupt the encryption keys, making recovery impossible.
- Reboots or shutdowns: System restarts may cause key damage. Proceed at your own risk.

HOW DID THIS HAPPEN?
We identified vulnerabilities within your network and gained access to critical parts of your infrastructure. The following data categories have been extracted and are now at risk:
- Personal records and client information
- Financial statements, contracts, and legal documents
- Internal communications
- Backups and business-critical files
We hold full copies of these files, and their future is in your hands.

YOUR OPTIONS
#1. Ignore This Warning:
- In 96 hours, we will release or sell your sensitive data.
- Media outlets, regulators, and competitors will be notified.
- Your decryption keys will be destroyed, making recovery impossible.
- The financial and reputational damage could be catastrophic.

#2. Cooperate With Us:
- You will receive the only working decryption tool for your files.
- We will guarantee the secure deletion of all exfiltrated data.
- All traces of this incident will be erased from public and private records.
- A full security audit will be provided to prevent future breaches.

FINAL REMINDER
Failure to act promptly will result in:
- Permanent loss of all encrypted data.
- Leakage of confidential information to the public, competitors, and authorities.
- Irreversible financial harm to your organization.

CONTACT US SECURELY
1. Install the TOR browser via hxxps://torproject.org
2. Visit our anonymous contact form at -
3. Use your unique Company ID: -
4. Review a sample of your compromised data for verification.
5. Use a VPN if TOR is restricted in your area.

Symptoms of Interlock Ransomware Infection

If you suspect that your computer has been infected with Interlock Ransomware, there are several symptoms to watch out for:

1. Encrypted Files: Files will have the .interlock extension, and they will be unreadable unless decrypted.
2. Unusual System Behavior: The system may slow down, or certain applications may stop working as a result of the encryption process.
3. Ransom Note: You will likely find a ransom note on your desktop or in a prominent location on your system.
4. Disabled Security Software: Antivirus or antimalware programs may be disabled, making it harder to detect or remove the threat.

Detection Names for Interlock Ransomware

To help identify if Interlock Ransomware has infected your system, you can look for detection names used by security tools. Some of the common detection names for this ransomware include:

• Trojan:Win32/Interlock
• Ransom:Win32/Interlock
• Interlock.A
• Mal/Interlock

If you encounter any of these detection names while running a scan, your system is likely infected with Interlock Ransomware.

Similar Threats

Interlock Ransomware is not an isolated case. There are several other ransomware strains that function in similar ways. Some notable examples include:

• Ryuk Ransomware: A well-known ransomware that also targets businesses and demands hefty ransoms.
• Maze Ransomware: Known for its double-extortion technique, where attackers steal sensitive data before encrypting files.
• Conti Ransomware: A dangerous ransomware that uses advanced tactics and has been linked to high-profile cyberattacks.
• Dharma Ransomware: A ransomware family known for its wide reach and destructive nature.

How to Remove Interlock Ransomware?

If you have confirmed that your system is infected with Interlock Ransomware, it's crucial to take immediate action. Follow these steps for removal:

Step 1: Disconnect from the Internet

Disconnect your system from the internet to prevent the ransomware from communicating with its command-and-control server and potentially spreading to other devices on the network.

Step 2: Enter Safe Mode

Reboot your computer and enter Safe Mode with Networking. This minimizes the malware's impact and allows you to perform a thorough scan.

Step 3: Run an Antivirus or Anti-Malware Scan

Use a trusted antivirus or anti-malware tool, such as SpyHunter, to scan your system. SpyHunter can detect and remove Interlock Ransomware and other related threats. Make sure to perform a full system scan to ensure that all traces of the malware are removed.

Step 4: Restore Files from Backup

If you have a backup of your files, restore them once the ransomware is removed. It’s essential to ensure that the backup is clean and free from malware before restoring it.

Step 5: Update Your Software

Ensure that your operating system, antivirus software, and other applications are up-to-date with the latest security patches. This reduces the chances of future ransomware infections.

Step 6: Monitor Your System

Keep an eye on your system for unusual activity after the ransomware is removed. It's important to stay vigilant in case of reinfection.

Preventing Future Ransomware Infections

To protect yourself from future ransomware attacks, follow these best practices:

1. Avoid Suspicious Emails: Do not open attachments or click links in emails from unknown senders.
2. Keep Your Software Updated: Regularly update your operating system, browser, and all software to fix vulnerabilities.
3. Use Reliable Antivirus Software: Install a reputable antivirus solution, such as SpyHunter, and keep it updated to protect against ransomware and other malware.
4. Backup Your Data Regularly: Always keep backups of your important files, either on an external drive or in a secure cloud storage service.
5. Educate Yourself: Stay informed about the latest cybersecurity threats and how to avoid them.

Conclusion

Interlock Ransomware is a significant threat to both personal and business users. It encrypts files and demands a ransom for their release, often causing significant data loss and financial strain. By following the steps outlined in this guide, you can detect, remove, and prevent further infections. Protect your system with reliable anti-malware tools like SpyHunter, and remember that prevention is always better than a cure.