Network Attached Storage (NAS) has become an essential solution for companies looking to centralise data, ensure high availability, and facilitate information sharing among teams. However, this popularity has made NAS devices attractive targets for ransomware attacks. Ransomware groups have begun exploiting vulnerabilities in these devices to encrypt critical files and demand millions in ransom in exchange for data recovery.
When a NAS becomes infected with ransomware, the impact can be devastating: complete operational disruption, the risk of permanent data loss, and significant damage to the company’s reputation. Unfortunately, many IT managers do not know how to handle this critical scenario properly, often making mistakes that can further worsen the situation.
How to identify if your NAS has been infected with ransomware
Quickly identifying that your NAS has been infected with ransomware is crucial to minimising damage and speeding up file recovery. In many cases, the sooner the issue is diagnosed, the greater the chances of successfully restoring the data without significant loss.
Among the most common signs of a compromised NAS are the sudden encryption of files, unusual extensions added to documents, denied access to content, and a ransom note with specific instructions demanding payment, usually in cryptocurrency. Some ransomware variants, such as Qlocker and DeadBolt, even block administrative access to the device, making it more difficult for the IT team to diagnose and respond.
For example, the DeadBolt ransomware has caused major damage by encrypting QNAP-branded NAS devices and demanding large payments to restore access to the data. Another example is Qlocker, which uses password-based encryption by compressing files into protected 7zip archives, significantly hindering victims’ access to their own data.
It is essential to be alert to any unusual behaviour, such as excessive slowness on the NAS or the sudden disappearance of folders and files. If an infection is suspected, it is recommended to immediately isolate the device by disconnecting it from the network to prevent the ransomware from spreading to other devices or company systems.
In addition, documenting all the observed signs during the incident will significantly support the subsequent process of file recovery and decryption. Upon noticing any of these symptoms, seek specialist assistance immediately to ensure a safe and effective data recovery.
What are the main types of ransomware that target NAS devices?
NAS devices, especially those directly connected to the internet, have become prime targets for various types of ransomware due to their exploitable vulnerabilities and the high value of the data stored on them. Below are the main ransomware strains known to infect NAS devices:
Qlocker
Qlocker emerged as a significant threat, particularly for users of QNAP-branded NAS devices. Unlike traditional ransomware, which uses complex encryption algorithms directly on individual files, Qlocker compresses the files using the 7zip format with a strong password generated by the criminals. It then demands ransom payment in cryptocurrency, usually Bitcoin. The main challenge with Qlocker lies in the recovery process, as the password remains inaccessible to the user.
DeadBolt
DeadBolt is a highly sophisticated and extremely active threat against NAS devices. It specifically targets NAS from QNAP and ASUSTOR, exploiting unpatched vulnerabilities or weak passwords to gain remote access to systems. Once the device is infected, the ransomware encrypts all files and modifies the NAS administrative login screen, displaying a clear message with instructions for ransom payment. DeadBolt typically demands a high ransom in Bitcoin and even offers “discounts” to companies with multiple infected devices.
eCh0raix
Another ransomware strain that has caused recurring issues is eCh0raix. It also tends to target NAS devices from QNAP and Synology. eCh0raix operates by exploiting vulnerabilities in the operating systems of NAS devices, as well as performing brute-force attacks on logins with weak passwords. Once the device is infected, the ransomware encrypts all data, changes file extensions, and leaves ransom notes demanding payment in cryptocurrency.
These examples highlight the critical need to properly protect NAS devices by keeping them updated and secure. However, if your NAS has already been compromised by one of these attacks, it is essential to know how to respond correctly. Below, you will learn the safest and most effective step-by-step approach to recover your NAS infected by ransomware.
How to recover a NAS infected by ransomware?
If your NAS has been infected by ransomware, acting quickly and correctly can make all the difference between fully recovering your data or suffering irreversible losses. The recovery process requires specific and controlled actions to avoid further damage and ensure the integrity of the files.
Carefully follow the steps below to begin a safe and effective recovery:
1. Immediate isolation of the NAS
As soon as you notice any sign of infection, immediately disconnect the NAS device from the network and power it off if possible. Isolation prevents the ransomware from continuing to encrypt files or spreading to other devices connected to the same network, significantly limiting the damage caused by the attack.
2. Do not take improvised actions
Avoid attempting improvised methods or using generic tools found online, as these procedures can permanently corrupt your files. DIY solutions, while they may seem quick, often make the situation worse and hinder subsequent professional recovery efforts.
3. Document all information about the attack
Create a detailed record of the incident: note the type of ransomware involved (usually identified by the ransom note or the extension added to files), take photos or screenshots of any ransom messages displayed by the ransomware, and log any unusual behaviour observed before and after the attack. This information will be essential in guiding the technical recovery strategy.
4. Do not pay the ransom immediately
Despite the pressure caused by a ransomware attack, paying the ransom does not guarantee data recovery and may also encourage future criminal activity. Many criminal groups simply disappear after receiving payment, leaving the company without both its money and its files. Therefore, consult specialists before making any decisions.
5. Contact a specialised company immediately
Seek specialised help immediately after detecting the infection. Companies like Digital Recovery have advanced technical expertise and dedicated infrastructure to ensure your files are recovered safely and with maximum efficiency.
At Digital Recovery, specialists will thoroughly analyse the infected NAS, identify the specific type of ransomware involved, assess the extent of the damage, and initiate safe technical procedures for the recovery of encrypted data.
6. Professional and secure recovery
Professional recovery involves the use of specialised technologies and methods to decrypt files or restore intact backups without posing additional risk to your data. This expert approach significantly increases the chances of a successful recovery and ensures that critical information is not permanently lost or corrupted.
By following these steps, your company will have a greater chance of fully recovering data from a NAS infected by ransomware, reducing operational, financial, and reputational losses.
If you’re facing a ransomware attack on your NAS, Digital Recovery is ready to help. Get in touch immediately and ensure a prompt initial assessment. Don’t risk your data—trust the expertise of those who have already helped hundreds of companies in similar situations.
Why choose Digital Recovery to decrypt ransomware on NAS devices?
When facing a critical situation such as a NAS ransomware infection, it is essential to rely on a trustworthy and experienced company to recover your data. Digital Recovery stands out as a leader in this field due to its unique combination of technical expertise, specialised infrastructure, and a proven track record of success in complex cases.
With hundreds of successful cases resolved, Digital Recovery has dealt with various types of ransomware, including strains such as Qlocker, DeadBolt, and eCh0raix. Our team is made up of skilled specialists who conduct a detailed analysis of the situation, proposing tailored strategies for each specific case. This level of technical expertise significantly increases the chances of full recovery of the affected data.
To ensure maximum security and effectiveness, Digital Recovery has an infrastructure specifically designed for sensitive situations.
We understand that when it comes to ransomware, every second counts. That’s why our team provides fast, personalised, and human-centred support from the very first contact through to full data recovery. Our commitment is to minimise downtime as much as possible and quickly restore your company’s operations, preventing deeper financial and reputational damage.
Our clients’ trust is built on numerous real cases successfully resolved by Digital Recovery. Regardless of the complexity or severity of the attack, our team applies advanced and exclusive techniques to restore critical data safely and efficiently. Our portfolio of resolved cases reinforces Digital Recovery’s technical and strategic capability in recovering NAS devices infected by ransomware.
By placing your trust in Digital Recovery, your company ensures the support needed to handle the critical situation, quickly recover essential data, and restore business operations safely and with peace of mind.
