How to remove NEVADA ransomware

NEVADA ransomware can encrypt users' personal files on Windows and Linux systems

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).

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.

Recommendations:
-> 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.^[1] 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.

Distribution methods

Most ransomware infections are caused by installing “cracked” software^[2] 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 SpyHunterCombo Cleaner or MalwarebytesMalwarebytes 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

1. Click Start > Shutdown > Restart > OK.
2. 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.
3. Select Safe Mode with Networking from the list.

Windows 10 / Windows 8

1. Right-click on the Start button and select Settings.
   
2. Scroll down to pick Update & Security.
3. On the left side of the window, pick Recovery.
4. Now scroll down to find the Advanced Startup section.
5. Click Restart now.
6. Select Troubleshoot.
7. Go to Advanced options.
8. Select Startup Settings.
9. Click Restart.
10. 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,^[3] 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

1. Download Data Recovery Pro.
2. Double-click the installer to launch it.
3. Follow on-screen instructions to install the software.
4. As soon as you press Finish, you can use the app.
5. Select Everything or pick individual folders where you want the files to be recovered from.
6. Press Next.
7. At the bottom, enable Deep scan and pick which Disks you want to be scanned.
8. Press Scan and wait till it is complete.
9. You can now pick which folders/files to recover – don't forget you also have the option to search by the file name!
10. Press Recover to retrieve your files.