NEVADA virus Removal Guide
What is NEVADA ransomware?
NEVADA ransomware can encrypt users' personal files on Windows and Linux systems
This variant of ransomware is sold on underground forums as RaaS
NEVADA is a ransomware that targets both Windows and Linux OS and is coded in Rust. It encrypts files, adds the “.NEVADA” extension to their names, and leaves a ransom note in the form of a “readme.txt” file. For instance, a file named “picture.jpg” becomes “picture.jpg.NEVADA”, and “document.doc” becomes “document.doc.NEVADA”. The creators of NEVADA sell it through Ransomware as a Service (RaaS).
|TYPE||Ransomware, data locking virus, crypto virus|
|DISTRIBUTION||Infected email attachments, peer-to-peer file-sharing platforms, torrents, software vulnerabilities|
|FILE RECOVERY||It is almost impossible to recover the files if you do not have backups or the decryption keys were not leaked; in some cases, recovery is successful with third-party software|
|ELIMINATION||Scan your machine with anti-malware software to eliminate the virus safely; this will not recover the locked files|
|SYSTEM FIX||You can avoid Windows reinstallation with FortectIntego maintenance tool, which can fix damaged files and system errors|
Ransomware as a Service
Ransomware as a Service (RaaS) is a type of cybercrime business model in which ransomware developers offer their software as a service to other individuals or organizations interested in conducting ransomware attacks. The developers typically provide ransomware software, a payment system, and technical support to their clients, who are in charge of disseminating the ransomware and collecting ransom payments.
This business model enables less technically savvy individuals or organizations to participate in ransomware attacks without developing their own software, which can be complex and time-consuming. RaaS has become a growing threat to organizations because it allows cybercriminals to carry out successful ransomware attacks more easily.
Organizations should implement robust cybersecurity measures, such as regular backups, software updates, and employee security training, to protect against RaaS and other types of attacks.
The ransom note
NEVADA ransomware drops a ransom note readme.txt which reads as follows:
Greetings! Your files were stolen and encrypted.
You have two ways:
-> Pay a ransom and save your reputation.
-> Wait for a miracle and lose precious time.
We advise you not to wait.
After 2 days of your silence we will make call your superiors and notificate them about what's happened.
After another 2 days all your competitors will be informed about your decision.
Finally, after 3 days we will post your critical data on our TOR-website.
If you are going to recover your files from backupsa and forget this like a nightmare, we are hurry to inform you – you can't prevent a leak.
-> Don't delete/rename encrypted files
-> Don't use any public “decryptor”, they contain viruses.
You have to download TOR browser.
To contact with us your can use the following link:
The cat is out of the bag.
This is a ransom note sent by a ransomware attacker demanding payment in exchange for access to encrypted files. If the ransom is not paid within a certain timeframe, the message threatens to reveal the victim's sensitive information to superiors, competitors, and the general public.
The attacker also warns the victim not to use public decryption tools because they may contain viruses, and instead instructs the victim to contact them via the TOR browser. The tone of the message is hostile, and it creates pressure on the victim to pay the ransom as soon as possible. The note emphasizes the gravity of the situation as well as the potential consequences of failing to pay the ransom.
It is critical to remember that paying the ransom does not guarantee that the attacker will release the encrypted files; in some cases, the attacker may simply accept the ransom payment without providing a decryption key. Furthermore, paying the ransom funds and encourages the attacker to carry out additional ransomware attacks, resulting in more victims and a never-ending cycle of cybercrime.
Victims should consider paying the ransom carefully cause cybercriminals can't be trusted
Most ransomware infections are caused by installing “cracked” software from Torrent websites and peer-to-peer file-sharing platforms. Because such pages are unregulated, they provide an ideal breeding ground for all types of malware. Choose official web stores and developer websites whenever possible.
Email is another common method of infection. Social engineering can be used by threat actors to create convincing letters that appear to be urgent messages from well-known entities. Malicious links or infected attachments are among them. We advise against opening email attachments from unknown senders.
Most importantly, keep your operating system and software up to date. Hackers can use software flaws to distribute malicious programs. Security patches are regularly released by software developers and should be installed as soon as they are available to ensure the system's security.
Use professional security tools to eliminate ransomware
The most important step is to disconnect the affected machine from the local network. Disconnecting the ethernet cable should suffice for home users. If this occurred at your workplace, doing so may be difficult; therefore, we have instructions for corporate environments at the bottom of this post.
Attempting to recover your data first may result in permanent loss. IRansomware has the ability to encrypt your files a second time. It will not stop until you remove the malicious files that are causing it. Unless you have prior experience, you should not attempt to remove the malicious program yourself.
Use anti-malware tools like SpyHunter 5Combo Cleaner or Malwarebytes to scan your system. This security software should find all the related files and entries and remove them automatically for you. In some cases, malware is not letting you use antivirus in normal mode, so you need to access Safe Mode and perform a full system scan from there:
Windows 7 / Vista / XP
- Click Start > Shutdown > Restart > OK.
- When your computer becomes active, start pressing the F8 button (if that does not work, try F2, F12, Del, etc. – it all depends on your motherboard model) multiple times until you see the Advanced Boot Options window.
- Select Safe Mode with Networking from the list.
Windows 10 / Windows 8
- Right-click on the Start button and select Settings.
- Scroll down to pick Update & Security.
- On the left side of the window, pick Recovery.
- Now scroll down to find the Advanced Startup section.
- Click Restart now.
- Select Troubleshoot.
- Go to Advanced options.
- Select Startup Settings.
- Click Restart.
- Press 5 or click 5) Enable Safe Mode with Networking.
Fix system errors
After a malware infection, performance, stability, and usability issues are to be expected, to the point where a full Windows reinstall is required. These infections can change the Windows registry database, harm vital bootup and other sections, delete or corrupt DLL files, and so on. When malware corrupts a system file, antivirus software cannot repair it.
This is why FortectIntego was developed. It can fix a lot of the damage caused by an infection like this. Blue Screen errors, freezes, registry errors, damaged DLLs, etc., can make your computer completely unusable. By using this maintenance tool, you could avoid Windows reinstallation.
- Download the application by clicking on the link above
- Click on the ReimageRepair.exe
- If User Account Control (UAC) shows up, select Yes
- Press Install and wait till the program finishes the installation process
- The analysis of your machine will begin immediately
- Once complete, check the results – they will be listed in the Summary
- You can now click on each of the issues and fix them manually
- If you see many problems that you find difficult to fix, we recommend you purchase the license and fix them automatically.
File recovery software
Many people believe that anti-malware tools can repair their files, but this is not the case. All security tools can do is detect suspicious processes and remove malicious files from your system. The truth is that the files can only be restored with a decryption key or software available only to cybercriminals that carried out the attack.
If you did not back up your data previously, you possibly lost your files forever. You can try using data recovery software, but third-party programs cannot always decrypt the files. We suggest at least trying this method. Before proceeding, you have to copy the corrupted files and place them in a USB flash drive or another storage. And remember – only do this if you have already removed the NEVADA ransomware.
Before you begin, several pointers are essential while dealing with this situation:
- Since the encrypted data on your computer might permanently be damaged by security or data recovery software, you should first make backups of it – use a USB flash drive or another storage.
- Only attempt to recover your files using this method after you perform a scan with anti-malware software.
Install data recovery software
- Download Data Recovery Pro.
- Double-click the installer to launch it.
- Follow on-screen instructions to install the software.
- As soon as you press Finish, you can use the app.
- Select Everything or pick individual folders where you want the files to be recovered from.
- Press Next.
- At the bottom, enable Deep scan and pick which Disks you want to be scanned.
- Press Scan and wait till it is complete.
- You can now pick which folders/files to recover – don't forget you also have the option to search by the file name!
- Press Recover to retrieve your files.
Getting rid of NEVADA virus. Follow these steps
Isolate the infected computer
Some ransomware strains aim to infect not only one computer but hijack the entire network. As soon as one of the machines is infected, malware can spread via network and encrypt files everywhere else, including Network Attached Storage (NAS) devices. If your computer is connected to a network, it is important to isolate it to prevent re-infection after ransomware removal is complete.
The easiest way to disconnect a PC from everything is simply to plug out the ethernet cable. However, in the corporate environment, this might be extremely difficult to do (also would take a long time). The method below will disconnect from all the networks, including local and the internet, isolating each of the machines involved.
- Type in Control Panel in Windows search and press Enter
- Go to Network and Internet
- Click Network and Sharing Center
- On the left, pick Change adapter settings
- Right-click on your connection (for example, Ethernet), and select Disable
- Confirm with Yes.
If you are using some type of cloud storage you are connected to, you should disconnect from it immediately. It is also advisable to disconnect all the external devices, such as USB flash sticks, external HDDs, etc. Once the malware elimination process is finished, you can connect your computers to the network and internet, as explained above, but by pressing Enable instead.
Find a working decryptor for your files
File encryption is a process that is similar to applying a password to a particular file or folder. However, from a technical point of view, encryption is fundamentally different due to its complexity. By using encryption, threat actors use a unique set of alphanumeric characters as a password that can not easily be deciphered if the process is performed correctly.
There are several algorithms that can be used to lock data (whether for good or bad reasons); for example, AES uses the symmetric method of encryption, meaning that the key used to lock and unlock files is the same. Unfortunately, it is only accessible to the attackers who hold it on a remote server – they ask for a payment in exchange for it. This simple principle is what allows ransomware authors to prosper in this illegal business.
While many high-profile ransomware strains such as Djvu or Dharma use immaculate encryption methods, there are plenty of failures that can be observed within the code of some novice malware developers. For example, the keys could be stored locally, which would allow users to regain access to their files without paying. In some cases, ransomware does not even encrypt files due to bugs, although victims might believe the opposite due to the ransom note that shows up right after the infection and data encryption is completed.
Therefore, regardless of which crypto-malware affects your files, you should try to find the relevant decryptor if such exists. Security researchers are in a constant battle against cybercriminals. In some cases, they manage to create a working decryption tool that would allow victims to recover files for free.
Once you have identified which ransomware you are affected by, you should check the following links for a decryptor:
- No More Ransom Project
- Free Ransomware Decryptors by Kaspersky
- Free Ransomware Decryption Tools from Emsisoft
- Avast decryptors
If you can't find a decryptor that works for you, you should try the alternative methods we list below. Additionally, it is worth mentioning that it sometimes takes years for a working decryption tool to be developed, so there are always hopes for the future.
Create data backups to avoid file loss in the future
One of the many countermeasures for home users against ransomware is data backups. Even if your Windows get corrupted, you can reinstall everything from scratch and retrieve files from backups with minimal losses overall. Most importantly, you would not have to pay cybercriminals and risk your money as well.
Therefore, if you have already dealt with a ransomware attack, we strongly advise you to prepare backups for future use. There are two options available to you:
- Backup on a physical external drive, such as a USB flash drive or external HDD.
- Use cloud storage services.
The first method is not that convenient, however, as backups need to constantly be updated manually – although it is very reliable. Therefore, we highly advise choosing cloud storage instead – it is easy to set up and efficient to sustain. The problem with it is that storage space is limited unless you want to pay for the subscription.
Using Microsoft OneDrive
OneDrive is a built-in tool that comes with every modern Windows version. By default, you get 5 GB of storage that you can use for free. You can increase that storage space, but for a price. Here's how to setup backups for OneDrive:
- Click on the OneDrive icon within your system tray.
- Select Help & Settings > Settings.
- If you don't see your email under the Account tab, you should click Add an account and proceed with the on-screen instructions to set yourself up.
- Once done, move to the Backup tab and click Manage backup.
- Select Desktop, Documents, and Pictures, or a combination of whichever folders you want to backup.
- Press Start backup.
After this, all the files that are imported into the above-mentioned folders will be automatically backed for you. If you want to add other folders or files, you have to do that manually. For that, open File Explorer by pressing Win + E on your keyboard, and then click on the OneDrive icon. You should drag and drop folders you want to backup (or you can use Copy/Paste as well).
Using Google Drive
Google Drive is another great solution for free backups. The good news is that you get as much as 15GB for free by choosing this storage. There are also paid versions available, with significantly more storage to choose from.
You can access Google Drive via the web browser or use a desktop app you can download on the official website. If you want your files to be synced automatically, you will have to download the app, however.
- Download the Google Drive app installer and click on it.
- Wait a few seconds for it to be installed.
- Now click the arrow within your system tray – you should see Google Drive icon there, click it once.
- Click Get Started.
- Enter all the required information – your email/phone, and password.
- Now pick what you want to sync and backup. You can click on Choose Folder to add additional folders to the list.
- Once done, pick Next.
- Now you can select to sync items to be visible on your computer.
- Finally, press Start and wait till the sync is complete. Your files are now being backed up.
Report the incident to your local authorities
Ransomware is a huge business that is highly illegal, and authorities are very involved in catching malware operators. To have increased chances of identifying the culprits, the agencies need information. Therefore, by reporting the crime, you could help with stopping the cybercriminal activities and catching the threat actors. Make sure you include all the possible details, including how did you notice the attack, when it happened, etc. Additionally, providing documents such as ransom notes, examples of encrypted files, or malware executables would also be beneficial.
Law enforcement agencies typically deal with online fraud and cybercrime, although it depends on where you live. Here is the list of local authority groups that handle incidents like ransomware attacks, sorted by country:
- USA – Internet Crime Complaint Center IC3
- United Kingdom – ActionFraud
- Canada – Canadian Anti-Fraud Centre
- Australia – ScamWatch
- New Zealand – ConsumerProtection
- Germany – Polizei
- France – Ministère de l'Intérieur
If your country is not listed above, you should contact the local police department or communications center.
How to prevent from getting ransomware
Do not let government spy on you
The government has many issues in regards to tracking users' data and spying on citizens, so you should take this into consideration and learn more about shady information gathering practices. Avoid any unwanted government tracking or spying by going totally anonymous on the internet.
You can choose a different location when you go online and access any material you want without particular content restrictions. You can easily enjoy internet connection without any risks of being hacked by using Private Internet Access VPN.
Control the information that can be accessed by government any other unwanted party and surf online without being spied on. Even if you are not involved in illegal activities or trust your selection of services, platforms, be suspicious for your own security and take precautionary measures by using the VPN service.
Backup files for the later use, in case of the malware attack
Computer users can suffer from data losses due to cyber infections or their own faulty doings. Ransomware can encrypt and hold files hostage, while unforeseen power cuts might cause a loss of important documents. If you have proper up-to-date backups, you can easily recover after such an incident and get back to work. It is also equally important to update backups on a regular basis so that the newest information remains intact – you can set this process to be performed automatically.
When you have the previous version of every important document or project you can avoid frustration and breakdowns. It comes in handy when malware strikes out of nowhere. Use Data Recovery Pro for the data restoration process.