How to Decrypt Beast Ransomware Files (.beast) and Recover Data?
Overview
Beast ransomware is a relatively new double-extortion operation first observed in July 2025. Victims have their data encrypted with the .beast extension and receive a ransom note titled readme.txt. Operators threaten to leak stolen data on their dark web leak portals if the ransom is not paid.
The group has already impacted at least 16 organizations across multiple countries, targeting diverse industries including education, manufacturing, law, government, and healthcare.
Related article: How to Remove Makop Ransomware and Restore Files (.makop) Safely?
Our Beast Decryptor – Advanced Recovery Solution
We developed a proprietary decryptor capable of unlocking files encrypted by Beast ransomware without paying the ransom. This tool was created through in-depth reverse-engineering of captured samples, leveraging leaked affiliate encryption keys and cryptographic flaws.
Key Features:
- High Accuracy: Matches encryption session keys precisely, reducing corruption risks.
- Dual-Mode Operation: Runs in offline (air-gapped) mode or online (cloud-assisted) mode for faster processing.
- Forensic Safe: Preserves encrypted originals until decrypted files are verified.
- Adaptive Key Hunting: Utilizes leaked affiliate key databases for accelerated cracking.
- Cross-Version Support: Compatible with multiple Beast builds used by different affiliates.
Also read: How to Decrypt NoBackups Ransomware and Recover .nobackups Files?
How Our Solution Works?
The decryption process involves:
- File Structure Identification – Detects Beast-specific encrypted file markers.
- Cryptographic Flaw Exploitation – Targets weaknesses in key generation found in some affiliate builds.
- Partial Key Assembly – Uses previously leaked partial keys to reconstruct a functional master key.
Requirements for Decryption
- Original readme.txt ransom note
- 2–5 encrypted files for cryptographic matching
- Administrative privileges on the affected system
- Internet connection for cloud-assisted mode (optional)
Immediate Incident Response Steps
- Disconnect infected systems from the network immediately.
- Preserve forensic evidence — ransom notes, logs, encrypted files.
- Avoid rebooting unless advised by a professional.
- Engage a trusted response team before contacting the attackers.
Data Recovery Options
Free Recovery Methods
- Check for Public Decryptors: Monitor NoMoreRansom.org and similar platforms for any new Beast decryptors.
- Restore from Offline Backups: Air-gapped backups remain the safest option.
- Use Cloud Storage Versioning: OneDrive, Dropbox, and Google Drive may hold older file versions.
- Leverage VM Snapshots: Roll back virtual machines to pre-infection states.
- File Carving Tools: Use utilities like PhotoRec to recover intact file segments.
Paid & Negotiated Methods
- Direct Payment: Risky; may not yield a working key and encourages further criminal activity.
- Professional Negotiators: Specialists who can sometimes lower ransom demands and verify decryption proof before payment.
- Specialized Vendor Decryptor: Our decryptor offers a lawful, reliable, and safe alternative, avoiding direct engagement with criminals.
Recovery Process in Steps
- Confirm .beast file extension and ransom note presence.
- Disconnect affected systems from all networks.
- Submit ransom note and encrypted file samples for analysis.
- Run decryptor in chosen mode.
- Verify restored files for data integrity.
- Implement post-incident hardening measures.
Also read: How to Decrypt KREMLIN Ransomware (.KREMLIN) and Recover All Files?
Beast Ransomware Profile
- First seen: July 2025
- Mode of operation: Ransomware-as-a-Service (RaaS)
- Extortion method: Double-extortion (encryption + data leak)
- Ransom note: readme.txt
- Victim count (confirmed): 16
Attack Tactics & Entry Points
- Initial Access:
- Compromised RDP credentials purchased on dark web markets
- Spear-phishing emails with malicious attachments
- Exploitation of outdated VPN software
- Compromised RDP credentials purchased on dark web markets
- Exploited Vulnerabilities:
- CVE-2024-3743 – Remote Code Execution in certain NAS devices
- CVE-2025-1182 – VPN authentication bypass vulnerability
- CVE-2024-3743 – Remote Code Execution in certain NAS devices
Tools Used by Beast Operators
- Cobalt Strike: Used for lateral movement, beaconing, and payload execution.
- Mimikatz: Extracts system credentials to escalate privileges.
- Rclone: Transfers stolen files to attacker-controlled cloud storage.
These tools, while legitimate in security testing, are repurposed here for malicious campaigns.
MITRE ATT&CK Mapping (Estimated)
- T1078 – Valid Accounts
- T1059 – Command and Scripting Interpreter
- T1041 – Exfiltration Over Command and Control Channel
- T1486 – Data Encrypted for Impact
- T1490 – Inhibit System Recovery
Indicators of Compromise
Emails:
recovery24.email@onionmail.com
blackpool@zohomail.eu
ambulafixdata@zohomail.eu
ambulafixdata@onionmail.org
br.fixdata24@proton.me
br.fixdata24@onionmail.com
helpdata24@zohomail.eu
helpdata24@onionmail.org
TOX ID:
92E5D1A8ECFC69E7967E7A9DC1C9A735CD8DCE965D12EF01F19966C7101EAF071B4CDEA310E9
Leak Sites:
beast6azu4f7fxjakiayhnssybibsgjnmy77a6duufqw5afjzfjhzuqd.onion
ooie6tet7ggcmlgvtmyvok4s6vha6ecwczssbchbyxrg2r6v2m6zkkad.onion
Victim Data And Stats
Country Distribution:
Industry Breakdown:
Attack Timeline:
Ransom Note Analysis
Beast’s readme.txt ransom note is terse and threatening:
YOUR FILES ARE ENCRYPTED AND STOLEN! Your files, documents, photos, databases and other important files are encrypted. You are not able to decrypt it by yourself! The only method of recovering files is to purchase an unique private key. Only we can give you this key and only we can recover your files. To be sure we have the decryptor and it works you can send an email: mastadonster@onionmail.org and decrypt one file for free. But this file should be of not valuable! Do you really want to restore your files? Write to email: mastadonster@onionmail.org Reserved email: iamaduck7@onionmail.org Backup XMPP: 54783@thesecure.biz Backup XMPP: 897243728161@thesecure.biz Attention! * 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. * We have been in your network for a long time. We know everything about your company most of your information has already been downloaded to our server. We recommend you to do not waste your time if you dont wont we start 2nd part. * You have 24 hours to contact us. * Otherwise, your data will be sold or made public. BEAST ransomware
Prevention & Hardening Measures
- Disable unused RDP and VPN accounts
- Apply security patches promptly
- Segment networks to contain potential breaches
- Enforce MFA for all privileged accounts
- Monitor outbound traffic for anomalies
Conclusion
The Beast ransomware campaign demonstrates a highly targeted, organized, and persistent threat, impacting multiple industries across different countries within a short period. With its use of anonymized communication channels like TOX and onion-based email addresses, along with professional leak site operations, Beast is clearly run by a group with experience in modern ransomware tactics.
Frequently Asked Questions
Contact Us To Purchase The Beast Decryptor Tool
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