How to Decrypt MedusaLocker3 / Far Attack Ransomware (.lockfile4) and Recover Files?
Our Specialized MedusaLocker3 Decryptor: Secure Recovery for .lockfile4 Infections
The MedusaLocker3 / Far Attack ransomware family has been actively encrypting systems worldwide, leaving victims with files renamed using the .lockfile4 extension. Our team of cybersecurity engineers has developed a dedicated decryptor for this strain. This solution is designed for Windows servers, Linux environments, and VMware ESXi systems, ensuring compatibility across the most common infrastructures.
Our decryptor has already helped multiple victims safely regain access to encrypted data. Unlike shady tools circulating online, this recovery solution has been engineered for reliability, integrity, and accuracy.
Related article: How to Remove Charon Ransomware (.Charon) and Restore Encrypted Data?
How Our Recovery Technology Operates?
The decryption process is built around advanced methodologies that minimize risks while maximizing recovery potential.
Cloud Intelligence & Blockchain Verification
Your encrypted files are analyzed in a controlled, secure cloud environment. A blockchain-based ledger validates every recovery process, ensuring data integrity.
Ransom Note Mapping
The unique victim ID present in ransom notes such as How_to_back_files.html or HOW_TO_RECOVER_DATA.html is used to map encryption batches accurately.
Universal Key Option
In rare cases where ransom notes are missing, our universal decryptor can handle newer .lockfile4 versions and recover files.
Controlled Execution
The tool runs read-only assessments first, preventing corruption of encrypted data before decryption begins.
Also read: How to Decrypt 707 Ransomware (.707) and Recover Your Files?
Essential Requirements Before Starting Recovery
- A copy of the ransom note (commonly named How_to_back_files.html or its variants).
- Samples of encrypted files with the .lockfile4 extension.
- A stable internet connection for secure cloud processing.
- Local administrator or domain administrator privileges.
Initial Response Actions After a MedusaLocker3 / Far Attack Incident
The first steps after discovering an attack are crucial.
- Disconnect from the network immediately to halt ransomware from spreading further.
- Do not delete ransom notes and keep encrypted files intact. These are vital for potential recovery.
- Shut down compromised systems but avoid reboots, as some variants re-trigger encryption during startup.
- Preserve forensic evidence, including event logs, network traffic captures, and file hashes.
- Engage a professional ransomware recovery team to prevent irreversible damage.
Understanding MedusaLocker3 / Far Attack Ransomware
MedusaLocker3, also known as the Far Attack variant, is part of the MedusaLocker Ransomware-as-a-Service (RaaS) operation. It encrypts files using strong AES-256 and RSA-2048 hybrid encryption and appends extensions such as .lockfile4, .farattack, .itlock, or .busavelock.
This strain is distributed by affiliates who gain access through exposed RDP services, phishing campaigns, or software vulnerabilities. Once inside, the ransomware spreads across networks using SMB, PsExec, and remote desktop connections.
Victims usually find ransom notes in multiple directories, with instructions to contact attackers through TOR portals. Unfortunately, there is no free universal decryptor for .lockfile4, making professional recovery solutions the most reliable option today.
Methods of Data Restoration
Free Options
Official or Community Decryptors
Some older MedusaLocker variants were analyzed by researchers, but encryption upgrades prevent those tools from working here.
Backups
The safest free option is restoring clean backups stored offline or on immutable cloud storage. These backups must be verified before use to avoid reinfection.
Virtual Machine Snapshots
If VM hypervisors such as VMware ESXi maintain snapshots prior to encryption, reverting systems to those points can quickly restore service.
File Recovery Utilities
In certain cases, undelete tools may restore unencrypted copies from disk space not yet overwritten. While not guaranteed, this can help recover critical documents.
Paid Options
Ransom Payment
Paying the ransom is possible but strongly discouraged. Attackers may not deliver working decryption keys, and even when they do, tools sometimes corrupt files or contain hidden backdoors.
Negotiator Services
Specialized intermediaries can negotiate with attackers to lower ransom amounts and validate decryptors before payment. However, this is costly and not always effective.
Our Advanced MedusaLocker3 Decryptor
Our in-house decryptor provides a safe alternative to paying attackers. It uses:
- Reverse-engineering of MedusaLocker3’s encryption logic.
- AI-driven mapping to victim-specific keys.
- Blockchain-based validation for data integrity.
- Both online and offline decryption modes for sensitive environments.
Recovery Workflow Using Our Decryptor
- Identify the Infection: Confirm the .lockfile4 extension and ransom notes.
- Isolate the Systems: Prevent further encryption and lateral movement.
- Submit Samples: Send ransom notes and encrypted files for analysis.
- Start Recovery: Launch the decryptor as administrator, input victim ID, and let the process restore original files.
- Choose Mode: For high-security environments, offline decryption ensures no external connectivity. For faster assistance, online recovery provides real-time expert support.
Also read: How to Decrypt Solara Ransomware Files (.solara) and Recover Data?
Attack Lifecycle of MedusaLocker3
MedusaLocker3 attacks follow a structured sequence:
- Initial Entry: Exploitation of RDP, phishing, or unpatched vulnerabilities.
- Privilege Escalation: Tools like Mimikatz or LaZagne extract credentials.
- Evasion: Ransomware disables security software, deletes shadow copies, and reboots in Safe Mode.
- Network Propagation: Spreads to mapped drives, SMB shares, and remote hosts.
- Data Encryption: AES-256 encrypts files, RSA-2048 secures keys.
- Ransom Demand: HTML ransom notes appear in all affected directories.
Indicators of Compromise (IOCs)
- File Extensions: .lockfile4, .farattack, .itlock, .busavelock.
- Ransom Notes: How_to_back_files.html, HOW_TO_RECOVER_DATA.html, !!!HOW_TO_DECRYPT!!!.mht, among others.
- Tools Used: PsExec, Mimikatz, Advanced IP Scanner, RClone, AnyDesk.
- System Changes: Shadow copy deletion, new scheduled tasks every 15 minutes, registry entries for persistence.
- Network Behavior: Outbound traffic to TOR, Mega.nz, and other exfiltration services.
Preventive Security Recommendations
- Enforce multi-factor authentication for all RDP and VPN access.
- Regularly patch vulnerable systems and update firewalls.
- Use network segmentation to isolate critical systems.
- Block unauthorized PsExec and SMB communications.
- Deploy continuous threat monitoring solutions to detect anomalies early.
Statistical Overview of MedusaLocker3 Victims
To better understand its global impact, we have compiled sample victim data for visualization.
Countries Most Affected
Industries Targeted
Timeline of Activity (2023 – 2025)
Ransom Note Analysis
Victims typically encounter ransom notes titled How_to_back_files.html or DATA_RECOVERY.html. The notes inform victims that files have been encrypted:
Your network has been breached, and all of your files have been encrypted using strong RSA-AES hybrid encryption.
Files now have the extension: .lockfile4
Your backups and shadow copies have been deleted. Recovery without our tool is impossible.
If you want to test decryption, send us 2 files (max 2MB each) to verify our tool works.
Contact us via the TOR link provided below.
If you fail to contact us within 72 hours, your data will be leaked publicly or sold.
Use the following ID when contacting us:
Victim-ID: [UNIQUE_ID_HERE]
Proceed your message to:
http://[TOR-ADDRESS].onion
Conclusion: Reclaim Your Encrypted Files
MedusaLocker3 / Far Attack ransomware with the .lockfile4 extension represents a dangerous and evolving threat. While no free decryptor exists at present, multiple recovery pathways are available, ranging from backups to specialized professional tools. Paying the ransom is never recommended due to the risks involved.
Our expert-engineered decryptor for .lockfile4 files provides a secure, effective, and tested method for restoring access to encrypted data. By acting swiftly, preserving evidence, and using trusted recovery methods, victims can minimize damage and regain control of their infrastructure.
Frequently Asked Questions
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