Mamona Ransomware Decryptor
Mamona ransomware is a rising offline ransomware variant known for its speed, stealth, and disruption capabilities. Unlike many ransomware strains, Mamona does not communicate with command-and-control (C2) servers, making it harder to track in traditional environments. Instead, it encrypts files using custom AES/RSA routines and drops a ransom note without ever exfiltrating data.
It’s this combination of quiet infiltration and devastating impact that makes Mamona a serious threat to organizations and individuals alike.
Technical Behavior
Once Mamona executes on a system, it begins encrypting files using a hybrid encryption scheme—typically AES for speed and RSA for secure key locking. The encrypted files are renamed with the extension .HAes (e.g., invoice.pdf.HAes).
The ransomware also places a ransom note named README.HAes.txt in every affected directory. This note falsely claims the attackers have stolen sensitive data and threatens public leaks if no ransom is paid.
The ransom note file contains the following message:
~~Mamona, R.I.P!~~
Welcome!
Visit our blog –> –
Chat —> –
Password —>
As you may have noticed by now, all of your files were encrypted & stolen.
—————–
[What happened?]
-> We have stolen a significant amount of your important files from your network and stored them on our servers.
-> Additionally, all files are encrypted, making them inaccessible without our decryption tool.
[What can you do?]
–> You have two options:
–> 1. Pay us for the decryption tool, and:
–> – You can decrypt all your files.
–> – Stolen data will be deleted from our servers.
–> – You will receive a report detailing how we accessed your network and security recommendations.
–> – We will stop targeting your company.
–> 2. Refuse to pay and:
–> – Your stolen data will be published publicly.
–> – Your files will remain locked.
–> – Your reputation will be damaged, and you may face legal and financial consequences.
–> – We may continue targeting your company.
[Warnings]
–> Do not alter your files in any way. If you do, the decryption tool will not work, and you will lose access permanently.
–> Do not contact law enforcement. If you do, your data will be exposed immediately.
–> Do not hire a recovery company. Decrypting these files without our tool is impossible. Each file is encrypted with a unique key, and you need our tool to decrypt them.
Screenshot of the desktop wallpaper of the affected system after Mamona attack
Mamona’s Attack Lifecycle
Mamona follows a structured attack model:
- Infiltration via phishing, RDP brute force, or third-party exploits.
- Execution of a standalone .exe file.
- Persistence by creating a local user account.
- Defense evasion using commands to kill antivirus processes (KillAV, PowerTool).
- Discovery using scanning tools like Advanced IP Scanner or MASSCAN.
- Credential access via tools like Mimikatz and LSASS dumps.
- Encryption and Ransom Note Drop—without C2 communication.
Tactics, Techniques, and Procedures (TTPs)
Mamona displays a high level of technical precision:
- Self-deletion using:
cmd.exe /C ping 127.0.0.7 -n 3 > nul & Del /f /q - Offline execution—no need for internet.
- Custom-built cryptographic engine, avoiding CryptoAPI.
- High-speed encryption targeting system, network drives, and NAS.
Indicators of Compromise (IOCs)
| Type | Indicator |
| File Extension | .HAes |
| Ransom Note | README.HAes.txt |
| SHA256 Hash | c5f49c0f566a114b529138f8bd222865c9fa9fa95f96ec1ded50700764a1d4e7 |
| Command Execution | ping 127.0.0.7 -n 3 > nul |
| Tool Activity | Mimikatz, RustDesk, PCHunter |
Targeted Environments
- Windows Servers: Targeted via RDP or unpatched software.
- VMware ESXi: Encrypts entire virtual machines.
- NAS Devices (e.g., QNAP): Via misconfigured SMB shares or admin credentials.
No Data Exfiltration Observed
Despite its threats, Mamona has shown no evidence of actual data exfiltration. The ransom notes’ claims of stolen data are a bluff, based on fear tactics rather than technical capability.
Visual Summary of Mamona Attack Flow
A detailed diagram illustrates Mamona’s attack process:
Impact of a Mamona Ransomware Attack
- Operational Downtime: Encrypted files halt business activity.
- Financial Losses: Recovery, downtime, and potential ransom costs.
- Data Unavailability: No easy way to decrypt without tools.
- Reputation Risk: Even fake data breach threats can cause panic.
Mamona Ransomware Decryptor Tool
Our Mamona Decryptor Tool is the only practical solution for victims of Mamona. It is built from the ground up to safely and efficiently decrypt .HAes files—on Windows, NAS, or ESXi systems—without paying a ransom.
Key Features
- Precision targeting: Designed specifically for Mamona’s encryption.
- Remote decryption: Uses secure online servers.
- User-friendly: Simple interface for technical and non-technical users.
- Data safe: No overwrites or corruption.
- Money-back guarantee if decryption fails.
How to Use the Mamona Decryptor Tool
- Contact Us: Reach us via WhatsApp or email to request access.
- Launch as Admin: Open the tool with elevated privileges.
- Enter Victim ID: Use the code in the ransom note for exact match.
- Start Recovery: The tool connects to our server and restores your data.
Note: A stable internet connection is required for decryption.
Detection & Monitoring Tools
- Wazuh with Sysmon: Detects file changes and suspicious patterns.
- FIM (File Integrity Monitoring): Triggers alerts on .HAes file creation.
- YARA Rules: Detect known Mamona strings and ransom note patterns.
- EDR Solutions: Monitor memory and command-line behaviors.
Free Recovery Methods
While not always reliable, you may attempt:
- NoMoreRansom.org: Check for open decryptors.
- Volume Shadow Copies: Use vssadmin to list versions.
- System Restore: Roll back to a safe state.
- PhotoRec/Recuva: Recover file fragments.
- Offline Backups: If available, always preferred.
Prevention & Hardening
| Strategy | Details |
| Patch Systems | Keep OS, firmware, and hypervisors updated |
| Access Control | MFA, RBAC, audit logs |
| Network Segmentation | VLANs, firewall rules |
| 3-2-1 Backups | 3 copies, 2 types, 1 off-site |
| EDR/IDS Tools | Real-time alerts and memory scanning |
| Employee Training | Phishing simulations and security drills |
Conclusion
Mamona ransomware represents a new kind of threat: lightweight, offline, fast, and effective. It encrypts data without exfiltration, then leverages fear to demand a ransom. The good news is: you don’t have to pay.
With our Mamona Decryptor Tool, victims can safely regain access to encrypted files without feeding the ransomware economy. Combine this with strong backups, employee training, and proactive monitoring to ensure resilience—not just recovery.
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