How to Decrypt RDAT Ransomware Files (.RDAT Extension) Safely?

Our RDAT Decryptor: Precision-Built for Rapid Recovery

Our cybersecurity team has analyzed the RDAT ransomware, a member of the Dharma family, and engineered a decryptor to address its file-locking mechanism. Designed for Windows environments where RDAT primarily spreads, this decryptor ensures reliable and accurate data restoration without relying on ransom negotiations.

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It supports both on-premises recovery and secure cloud-assisted decryption, offering flexibility for enterprises, SMBs, and individual victims.

How the RDAT Decryptor Works?

The recovery tool for .RDAT files is based on a combination of forensic research and AI-assisted blockchain validation.

AI + Blockchain Verification: Each encrypted file is processed in a secure environment where blockchain confirms integrity after decryption.
Unique ID Mapping: RDAT attaches a victim ID and attacker’s email to each file. The decryptor matches this ID to restore affected files.
Universal Mode (Premium): Even if ransom notes are missing, our advanced version uses exploit-based decryption logic to process .RDAT files.
Read-Only Execution: The decryptor runs non-destructive scans to ensure files remain unmodified during the recovery attempt.

Also read: How to Decrypt Cephalus Ransomware and Recover .sss Files?

Immediate Measures After a RDAT Attack

When RDAT strikes, quick action is crucial to avoid additional damage.

Disconnect Immediately – Isolate the infected machines from all networks to prevent spreading across shared drives or servers.
Preserve Evidence – Do not delete ransom notes (DAT_INFO.txt) or encrypted files. Keep system logs, network activity, and file hashes intact for analysis.
Avoid Rebooting – Restarting compromised systems may trigger additional encryption. Shut them down carefully and avoid formatting disks.
Consult Experts – Unverified tools and random forum methods often corrupt files further. Engage trusted professionals for recovery guidance.

Understanding RDAT Ransomware

RDAT belongs to the notorious Dharma ransomware family. Unlike destructive malware, Dharma variants typically avoid encrypting system-critical files, focusing instead on local and network-stored data.

When executed, RDAT appends filenames with a victim-specific ID, attacker email, and the .RDAT extension (e.g., document.pdf.id-XXXX.[dat@mailum.com].RDAT). Victims receive a ransom note both as a pop-up and as a text file (DAT_INFO.txt).

The attackers allow victims to test decrypting up to three small files for free, but demand cryptocurrency payments for full recovery.

Options for Decrypting and Recovering RDAT Files

Free Recovery Paths

There are limited free methods available, and most depend on the exact variant of RDAT.

Older Variant Decryptors: Some Dharma-based strains have weak cryptography, making them partially recoverable with tools like Emsisoft or Avast decryptors. Unfortunately, newer RDAT builds usually deploy stronger keys, rendering these ineffective.

Backup Restoration: If backups are maintained offline or on immutable cloud storage, victims can format affected systems and restore data. Snapshot verification is important to ensure integrity before recovery.

Shadow Copy Rollback: RDAT typically deletes shadow copies, but in rare cases where the deletion fails, Windows’ “Previous Versions” may allow file rollback. This is uncommon but worth checking.

Paid Recovery Methods

Ransom Payment (Not Recommended): Some victims choose to pay the ransom, but there is no guarantee of receiving a working decryptor. Attackers often send incomplete or malicious tools. Additionally, paying funds criminal operations and may violate laws.

Negotiator Services: Third-party mediators sometimes handle ransom talks, reducing costs or validating decryptors. However, this method is expensive and risky.

Our Specialized RDAT Decryptor:
We have developed a proprietary decryptor tailored for RDAT ransomware.

Reverse-Engineered Logic: Our team studied Dharma’s encryption patterns and identified weaknesses in RDAT’s process.
Cloud-Assisted Decryption: Files are uploaded to a secure sandbox, decrypted using proprietary infrastructure, and returned with validation logs.
Universal Mode: Can process files even without ransom notes by analyzing metadata and encryption timestamps.
Safe Execution: Works in read-only mode to prevent data corruption and logs all activity for compliance.

Using the RDAT Ransomware Decryptor

Step 1: Prepare the Environment

Before running the decryptor, isolate the infected systems from the network. This ensures no further encryption takes place. Make sure you have:

The ransom note (rdat_readme.txt)
At least one encrypted file for testing
Administrative privileges on the machine

Step 2: Launch the Decryptor

Run the RDAT Decryptor as an administrator. This allows it to access the necessary system files without restrictions.

Step 3: Upload Required Inputs

The decryptor requires the ransom note and a sample encrypted file. These are uploaded securely to our encrypted cloud environment, where blockchain-backed validation ensures file integrity.

Step 4: Enter Victim ID

Locate the unique Victim ID inside the ransom note and enter it into the decryptor. This ID is used to map your case to the correct encryption batch. If the ransom note is missing, you may opt for our Universal Decryptor, which works on the latest RDAT variants without requiring the note.

Step 5: Scan and Assess

The decryptor performs a read-only scan to assess file structure and encryption status. No files are modified during this phase.

Step 6: Start the Decryption Process

Once verified, click Start Decryptor. The tool connects to our secure blockchain-enhanced servers and begins decrypting the files. Progress is displayed in real time.

Step 7: Verify Recovered Files

Decrypted files are restored to their original state. The decryptor also generates an integrity report, confirming that files are free from corruption and match their pre-attack state.

Step 8: Offline or Online Options

Online Mode: Faster recovery with cloud assistance and live monitoring.
Offline Mode: Suitable for air-gapped or highly sensitive environments, where files are processed locally.

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Also read: How to Recover Lost Data from Salted2020 Ransomware (.salted2020 Extension)?

Technical Insights into RDAT Operations

Infection Vectors

RDAT commonly spreads through compromised RDP services, phishing attachments, and malicious downloads. Attackers use brute-force attacks on weak passwords and disable firewalls to gain persistence.

Tactics, Techniques, and Procedures (TTPs)

Persistence: RDAT copies itself to %LOCALAPPDATA% and registers startup keys.
Privilege Escalation: Terminates processes like databases to ensure open files are encrypted.
Defense Evasion: Deletes Windows Shadow Volume Copies to block recovery.
Discovery: Collects geolocation data to decide whether to encrypt, skipping low-value regions.
Impact: Encrypts user and shared files, leaving ransom notes across the system.

Tools Commonly Used

Mimikatz / LaZagne – for credential theft.
RDP brute-force scripts – to gain access.
File transfer tools (WinSCP, AnyDesk, RClone) – for exfiltration and persistence.

Indicators of Compromise (IOCs)

File Extensions: .RDAT appended to locked files.
Ransom Notes: DAT_INFO.txt with attacker emails (dat@mailum.com, datret@tuta.com, Telegram @returndat).
Registry Keys: RDAT auto-start entries in HKCU\Software\Microsoft\Windows\CurrentVersion\Run.
Process Behavior: Termination of SQL, Exchange, or file server processes to force encryption.
Detection Names: Avast (Win32:MalwareX-gen [Ransom]), Kaspersky (Trojan-Ransom.Win32.Crusis.to), Microsoft (Ransom:Win32/Wadhrama!pz).

Content and Structure of the RDAT Ransom Note

Text presented in the ransom note file:

all your data has been locked us
You want to return?
write email dat@mailum.com or datret@tuta.com or @returndat

Victim Impact Stats

Countries Affected

Organizations Targeted

Attack Timelin

Conclusion: Reclaim Control After a RDAT Attack

RDAT ransomware is a dangerous evolution of the Dharma family, encrypting files with the .RDAT extension and demanding ransom. While free recovery options exist for older variants, most victims require advanced solutions.

Paying attackers is never recommended due to risks and lack of guarantees. Instead, verified decryptors, expert recovery assistance, and strong prevention practices are the safest route.

Our RDAT Decryptor has already helped multiple victims safely restore systems without ransom payments. By acting quickly, isolating affected systems, and engaging professionals, you can recover data, rebuild operations, and strengthen defenses against future threats.

Frequently Asked Questions

In most cases, no. RDAT uses strong encryption algorithms inherited from the Dharma ransomware family. Free decryptors only work for older Dharma strains with weak keys. However, if backups are available or if shadow copies were not deleted, data can sometimes be restored without paying a ransom.

Yes, the ransom note contains the victim ID that RDAT attaches to encrypted files. This ID is crucial for mapping encryption batches. Without it, recovery becomes more complex. Our universal decryptor, however, can sometimes recover files even without the original note.

Paying the ransom does not guarantee recovery. Many victims have reported receiving non-functional decryptors or no response at all. Additionally, payment funds criminal activity and may put you at risk of legal consequences depending on your region.

The cost varies depending on the scale of infection, system environment, and file volume. Standard recovery engagements may start in the tens of thousands of dollars for businesses. Custom quotes are given after analyzing encrypted files and ransom notes.

Yes. Our decryptor is primarily optimized for Windows, where RDAT infections are most common. It has been successfully used in environments with standalone systems, domain-joined networks, and cloud-connected servers.

RDAT usually exploits weak or exposed Remote Desktop Protocol (RDP) services. Attackers use brute-force and dictionary attacks to steal credentials. Other infection vectors include phishing emails, malicious downloads, pirated software, and fake updates.

The most effective defenses include: enforcing multi-factor authentication on RDP/VPNs, keeping systems updated, segmenting networks, maintaining offline or immutable backups, and running continuous security monitoring. A reputable antivirus should also be installed and regularly updated.

Victims will notice files renamed with the .RDAT extension and appended IDs/emails. Attempts to open files will fail, and ransom notes (DAT_INFO.txt) will appear on the desktop. A pop-up window will also warn that all files are encrypted.

Yes, if backups are connected to the infected system at the time of attack, they may also be encrypted. That’s why it’s critical to use offline, off-site, or immutable backup solutions. Cloud backups with strong access controls usually fare better.

Both approaches are possible. Online recovery through secure channels allows faster decryption and live support, while offline methods are safer in highly sensitive environments. Our RDAT decryptor supports both, depending on victim needs.

Contact Us To Purchase The RDAT Decryptor Tool

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How to Decrypt RDAT Ransomware Files (.RDAT Extension) Safely?

Our RDAT Decryptor: Precision-Built for Rapid Recovery