Interlock Ransomware: Detection, Removal, and Prevention

Ransomware is a malicious type of malware designed to encrypt files on a target system, rendering them inaccessible to the user. Attackers then demand a ransom, usually in cryptocurrency, in exchange for the decryption key needed to restore access to the encrypted files. This form of digital extortion has become one of the most prevalent and harmful cybersecurity threats today, causing immense financial loss, data compromise, and disruptions in both personal and business environments. Understanding specific threats like Interlock ransomware is crucial to safeguard against such attacks and to take the right action if compromised.

Overview of the Interlock Ransomware Threat

Interlock ransomware is a strain of ransomware that targets Windows systems, aiming to lock users out of their critical files. Once installed, Interlock goes through a series of steps to encrypt files, making them inaccessible until the user complies with the attacker’s demands. The ransomware primarily spreads through phishing emails, malicious links, and sometimes by exploiting system vulnerabilities. Once on the victim’s system, Interlock ransomware encrypts files, appending a specific extension to signify they have been compromised — typically, this extension is unique to each variant of the Interlock ransomware and often helps in the identification process.

Installation and Attack Process

Interlock ransomware commonly installs itself through methods like:

1. Phishing Emails: Malicious attachments or links are embedded within seemingly legitimate emails, often disguised as urgent messages from known contacts or organizations.
2. Malicious Links on Untrusted Sites: Downloads are triggered by visiting compromised websites or interacting with fake download buttons.
3. Vulnerabilities in Software: Outdated or vulnerable software can be exploited by attackers to gain entry.

After installation, the ransomware begins its encryption phase, targeting various file types including documents, photos, databases, and more, appending a distinct extension to each encrypted file. Users will soon notice their files are inaccessible, and many will display a new extension. This phase of encryption renders files unusable without the decryption key held by the attacker.

Consequences and Ransom Note

Upon encryption, Interlock ransomware generates a ransom note on the infected system. This note is typically named something like “!__README__!.txt” and contains detailed instructions on how to pay the ransom in exchange for file restoration. The note usually includes:

• A ransom amount (demanded in cryptocurrency).
• Contact information (email or web portal) for further communication.
• Threats of file deletion or increased ransom if payment is not made within a specific timeframe.

The purpose of Interlock, like other ransomware, is straightforward: to extort money from the victim by holding their data hostage.

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.

Why Ransomware Infiltrates Systems

Ransomware like Interlock infiltrates systems to extort individuals and organizations financially. It poses a significant threat not only to the data on the infected system but also to personal privacy, as attackers may have access to sensitive information. Given its disruptive potential, ransomware is often classified as one of the most dangerous forms of malware.

Symptoms of Interlock Ransomware

Detecting ransomware early can minimize damage. Symptoms specific to Interlock ransomware include:

• File Extension Changes: A new extension is added to encrypted files, which cannot be opened.
• Ransom Note Appearance: The system will display a ransom note, typically in a text file, directing the user to pay a fee.
• Slow System Performance: Encryption can cause system slowdown as files are encrypted.
• Error Messages on Accessing Files: Attempts to open encrypted files will result in error messages.

Detection Names for Interlock Ransomware

To confirm the presence of Interlock ransomware, users can refer to detection names provided by various antivirus programs. Some common detection names include:

• Ransom.Interlock
• Trojan.Ransom.Interlock
• Filecoder.Interlock

Using these detection names with reliable antivirus software helps confirm the infection and assists in choosing the appropriate removal method.

Similar Ransomware Threats

Interlock ransomware is part of a larger family of ransomware. Other similar threats that users may encounter include:

• LockBit Ransomware: Known for its aggressive encryption tactics and high ransom demands.
• Conti Ransomware: Infamous for targeting organizations and demanding substantial sums.
• Maze Ransomware: Notable for stealing and threatening to release data if the ransom is unpaid.

Removal Guide for Interlock Ransomware

Step 1: Boot into Safe Mode

1. Restart your computer.
2. Press F8 or Shift + F8 as the computer starts to open the Advanced Boot Options menu.
3. Select Safe Mode with Networking from the list to boot the system with minimal drivers.

Step 2: Install SpyHunter Anti-Malware

1. In Safe Mode, open a browser and download SpyHunter from a reliable source.
2. Install and run the tool, allowing it to scan your system thoroughly.
3. SpyHunter will identify and list the ransomware and related malicious files. Choose Remove Threats to delete them.

Step 3: Restore Files (Optional)
If you have a backup, restore files from it after confirming the malware has been fully removed. Alternatively, use decryption tools if available, though success depends on the specific encryption method.

Step 4: Update Your System and Software
Ensure your operating system and all software are up to date. Security patches can prevent vulnerabilities that ransomware exploits.

Prevention Tips

1. Avoid Suspicious Emails: Don’t open emails or attachments from unknown sources.
2. Install Anti-Malware Software: Use software like SpyHunter to protect against malware.
3. Regular Backups: Regularly back up data to offline storage, making it easier to recover data without paying a ransom.
4. Update Software Regularly: Keep operating systems and applications updated to avoid security loopholes.
5. Enable Firewalls and Security Settings: Use firewalls and activate security settings to add an additional layer of protection.

SpyHunter offers a reliable solution to prevent ransomware and other malware from infiltrating your system. Download SpyHunter today to safeguard your computer and scan your files for free.