How to remove NEMTY 2.5 REVENGE from the operating system

Also Known As: NEMTY 2.5 REVENGE virus
Distribution: Low
Damage level: Severe

NEMTY 2.5 REVENGE ransomware removal instructions

What is NEMTY 2.5 REVENGE?

NEMTY 2.5 REVENGE was discovered by Raby. This ransomware renames encrypted files by appending the ".NEMTY_[string of random characters]" extension to their filenames. For example, it renames "1.jpg" to "1.jpg.NEMTY_OF7X2YU", and so on. It also creates a ransom message within a text file, the name of which includes the same string of random characters as encrypted files. For example, in this case, "NEMTY_[string of random characters]-DECRYPT.txt" would be "NEMTY_OF7X2YU-DECRYPT.txt". Typically, ransom messages created by ransomware contain instructions about how to contact and/or pay cyber criminals.

The ransom message states that NEMTY 2.5 REVENGE encrypts some or all files. To obtain a decryption tool, victims must pay a ransom. Cyber criminals behind NEMTY 2.5 REVENGE encourage victims to pay the ransom within three months, since after this period decryption keys are deleted from their server and they will be unable to provide decryption tools. The ransom must be paid by following instructions on the Tor website (a link to this website is provided in the ransom message). Victims can use the website for free decryption of three files, which it allows them to upload if they do not exceed 1 MB. To decrypt remaining files, however, they must use a decryption tool, which is equivalent to 0.17 of Bitcoin. Ransoms can be paid by making a transaction to a BTC wallet address provided. Cyber criminals claim that a download link for a decryption tool will appear on their Tor website after three payment confirmations. Note that most cyber criminals/ransomware developers do not provide decryption tools even if they are paid. Therefore, victims of ransomware who trust cyber criminals and pay ransoms are often scammed. Only the cyber criminals behind ransomware (the developers) have tools that can recover files encrypted by their ransomware. Furthermore, files remain encrypted even if victims remove ransomware from the operating system. Removal simply prevents it from causing further encryption. In most cases, the only way to recover files without having to pay a ransom is to restore them from an existing data backup.

Screenshot of a message encouraging users to pay a ransom to decrypt their compromised data:

NEMTY 2.5 REVENGE decrypt instructions (NEMTY_OF7X2YU-DECRYPT.txt)

NEMTY 2.5 REVENGE is similar to other programs of this type including, for example, Helpforyoupc, Tl30z, and MZP. Typically, these programs encrypt files so that victims are unable to access them without tools that can only be purchased from the cyber criminals who designed the ransomware. Common differences are usually cryptographic algorithm (symmetric or asymmetric) used to encrypt data and cost of decryption. Unfortunately, many victims are tempted to trust cyber criminals and pay the ransoms, since only they can provide decryption tools/keys. In rare cases, it is possible to avoid this situation if the ransomware is not fully developed, contains bugs, flaws, etc., or when victims have a data backup that was created before the ransomware attack. For this reason, we recommend that you have a copy of data (backup) stored elsewhere (on a remote server such as Cloud or unplugged storage device).

How did ransomware infect my computer?

Common ways to proliferate ransomware are spam campaigns, fake software updaters, untrustworthy software download channels, Trojans and software unofficial 'cracking' (activation) tools. Cyber criminals proliferate malware via spam campaigns by sending emails that contain malicious attachments (or web links that download malicious files). Typically, they attach Microsoft Office or PDF documents, archive files such as ZIP, RAR, executable files (.exe) or JavaScript files. Their main goal is to trick people into opening the attached (or downloaded) file. If opened, the file installs malware. Fake software updaters infect systems by exploiting flaws/bugs of outdated programs installed on the computer or by downloading and installing malicious software rather than updates/fixes. Another common way to proliferate ransomware (and other malware) is using untrustworthy file and/or software download sources. For example, Peer-to-peer networks (e.g., torrent clients, eMule), third party downloaders, freeware download, free file hosting web pages, and so on. Cyber criminals use them to upload malicious files (typically, they disguise them as legitimate, harmless). If downloaded and opened, however, the files infect systems with malicious software. Trojans are malicious programs that, if installed, cause chain infections. These programs often download and install other malware. Software 'cracking' tools are unofficial programs that some people use to bypass paid activation of licensed software, however, these tools often install malicious programs rather than activating any software.

Threat Summary:
Name NEMTY 2.5 REVENGE virus
Threat Type Ransomware, Crypto Virus, Files locker.
Encrypted Files Extension .NEMTY_[string of random characters] (e.g., .NEMTY_OF7X2YU).
Ransom Demand Message NEMTY_[string of random characters]-DECRYPT.txt (e.g., NEMTY_OF7X2YU-DECRYPT.txt) and Tor website.
Ransom Amount 0.17432526 of Bitcoin
Bitcoin Wallet Address 3GEJ2nCBLcdBhLdkxTCXUf282XoQDojfUP
Detection Names AVG (FileRepMalware), BitDefenderTheta (Gen:NN.ZexaF.33558.my0@a8yNvpfG), Kaspersky (UDS:DangerousObject.Multi.Generic), Microsoft (Trojan:Win32/Wacatac.B!ml), Full List Of Detections (VirusTotal)
Symptoms Cannot open files stored on your computer, previously functional files now have a different extension (for example, my.docx.locked). A ransom demand message is displayed on your desktop. Cyber criminals demand payment of a ransom (usually in bitcoins) to unlock your files.
Distribution methods Infected email attachments (macros), torrent websites, malicious ads.
Damage All files are encrypted and cannot be opened without paying a ransom. Additional password-stealing trojans and malware infections can be installed together with a ransomware infection.
Malware Removal (Windows)

To eliminate possible malware infections, scan your computer with legitimate antivirus software. Our security researchers recommend using Malwarebytes.
▼ Download Malwarebytes
To use full-featured product, you have to purchase a license for Malwarebytes. 14 days free trial available.

How to protect yourself from ransomware infections

Do not open files (and/or website links) that are attached to irrelevant emails, especially if the emails are received from unknown, suspicious addresses. Software should be downloaded using official websites and via direct links. All other sources/tools mentioned above could be used to proliferate malicious software. Installed programs must be updated and activated only through implemented functions and/or tools that are provided by official developers. It is illegal to activate software through unofficial tools. Furthermore, this can lead to unintentional installation of malware. Have a reputable anti-spyware or antivirus suite installed on the the operating system and regularly run scans for threats. If your computer is already infected with NEMTY 2.5 REVENGE, we recommend running a scan with Malwarebytes for Windows to automatically eliminate this ransomware.

Text presented in NEMTY 2.5 REVENGE ransomware text file (in this case "1.jpg.NEMTY_OF7X2YU"):

---> NEMTY 2.5 REVENGE <---

 

Some (or maybe all) of your files got encryped.
We provide decryption tool if you pay a ransom.

 

Don't worry, if we can't help you with decrypting - other people won't trust us.
We provide test decryption, as proof that we can decrypt your data.

 

You have 3 month to pay (after visiting the ransom page) until decryption key will be deleted from server.
After 3 month no one, even our service can't make decryptor.

 

1) Web-Browser
  a) Open your browser.
  b) Open this link: hxxp://nemty.top/public/pay.php
  c) Upload this file.
  d) Follow the instructions.

 

2) Tor-Browser
  a) Download&Install Tor-Browser.
  b) Open Tor-Browser.
  c) Open this link : hxxp://zjoxyw5mkacojk5ptn2iprkivg5clow72mjkyk5ttubzxprjjnwapkad.onion/public/pay.php
  d) Upload this file.
  e) Follow the instruction.

 
-

Screenshot of NEMTY 2.5 REVENGE Tor website:

NEMTY 2.5 REVENGE ransomware html file ()

Text presented within this site:

YOUR FILES
ARE ENCRYPTED!


Payment till 05/04/2020 or private key will be deleted

 

Price: 0.17432526 BTC (~1300$)

 

BTC wallet: 3GEJ2nCBLcdBhLdkxTCXUf282XoQDojfUP

 

How to get NEMTY_OF7X2YU decryptor?

 

1. Create a Bitcoin Wallet (we recommend blockchain.info)

2. Buy necessary amount of Bitcoins. Current price for buying is 0.17432526 BTC

3. Send 0.17432526 BTC to the following Bitcoin address: 3GEJ2nCBLcdBhLdkxTCXUf282XoQDojfUP

* This receiving address was created for you, to identify your transactions

4. Wait for 3 confirmations

5. Reload current page after, and get a link to download NEMTY_OF7X2YU decryptor

 

Online help

 

Payment status:
BTC wallet: 3GEJ2nCBLcdBhLdkxTCXUf282XoQDojfUP
Price: 0.17432526 BTC
Sent: 0 BTC

The appearance of NEMTY 2.5 REVENGE ransomware Tor website (GIF):

NEMTY 2.5 REVENGE ransomware pop-up gif

Screenshot of files encrypted by NEMTY 2.5 REVENGE (in this case, "1.jpg.NEMTY_OF7X2YU" extension):

Files encrypted by NEMTY 2.5 REVENGE ransomware (1.jpg.NEMTY_OF7X2YU extension)

Screenshots of updated NEMTY 2.5 REVENGE ransomware website:

Initial page:

NEMTY 2.5 RANSOMWARE updated website (page 1)

Text presented within this page:

Happy to see you!
Your files are encrypted?
Don't worry, you can return them all!

Upload NEMTY_*******.txt

Second page:

 NEMTY 2.5 RANSOMWARE updated website (page 2)

Text presented within this page:

What's happen?

Files are encrypted. Only our service can provide full decryption!
We are providing 1 test decrypt, to prove that we can recover your files.

Click "Test Decrypt" at the menu on the top of this page to decrypt 1 file for free.

Attention! We are decrypting only image files for free, as they don't have any significant value to you. Don't try to cheat us.
To recover your files, you must pay the fee.

Your current fee: 1300$ (price is changing every hour)

You must hurry up because your 50% discount will expire after the counter in the footer of this page will reach zero. If you fail to pay until that time, the fee will be doubled, so if it was 1300$ it will become 2600$.

To pay the fee you must buy Bitcoin, and send exactly 0.1520557 BTC to this address: 3DYKMgoNwQk2ZcAEBqw8u6hvFHeYoZWkrM

To see how to buy the bitcoins, click "Buy BTC" at the tab menu on top of the page.

Update 3 March 2020 - The developers of Nemty ransomware have recently launched a website that is used to leak data of non-paying victims. At this time, the site only contains data stolen from one victim. Nonetheless, the list is very likely to increase.

Screenshot of Nemty ransomware data leak page:

Nemty ransomware data leaking site

NEMTY 2.5 REVENGE ransomware removal:

Instant automatic malware removal: Manual threat removal might be a lengthy and complicated process that requires advanced computer skills. Malwarebytes is a professional automatic malware removal tool that is recommended to get rid of malware. Download it by clicking the button below:
▼ DOWNLOAD Malwarebytes By downloading any software listed on this website you agree to our Privacy Policy and Terms of Use. To use full-featured product, you have to purchase a license for Malwarebytes. 14 days free trial available.

Quick menu:

Isolating the infected device:

Some ransomware-type infections are designed to encrypt files within external storage devices, infect them, and even spread throughout the entire local network. For this reason, it is very important to isolate the infected device (computer) as soon as possible.

Step 1: Disconnect from the internet.

The easiest way to disconnect a computer from the internet is to unplug the Ethernet cable from the motherboard, however, some devices are connected via a wireless network and for some users (especially those who are not particularly tech-savvy), disconnecting cables may seem troublesome. Therefore, you can also disconnect the system manually via Control Panel:

Navigate to the "Control Panel", click the search bar in the upper-right corner of the screen, enter "Network and Sharing Center" and select search result: Disconnecting computer from the Internet (step 1)

Click the "Change adapter settings" option in the upper-left corner of the window: Disconnecting computer from the Internet (step 2)

Right-click on each connection point and select "Disable". Once disabled, the system will no longer be connected to the internet. To re-enable the connection points, simply right-click again and select "Enable". Disconnecting computer from the Internet (step 3)

Step 2: Unplug all storage devices.

As mentioned above, ransomware might encrypt data and infiltrate all storage devices that are connected to the computer. For this reason, all external storage devices (flash drives, portable hard drives, etc.) should be disconnected immediately, however, we strongly advise you to eject each device before disconnecting to prevent data corruption:

Navigate to "My Computer", right-click on each connected device and select "Eject": Ejecting external storage devices

Step 3: Log-out of cloud storage accounts.

Some ransomware-type might be able to hijack software that handles data stored within "the Cloud". Therefore, the data could be corrupted/encrypted. For this reason, you should log-out of all cloud storage accounts within browsers and other related software. You should also consider temporarily uninstalling the cloud-management software until the infection is completely removed.

Identify the ransomware infection:

To properly handle an infection, one must first identify it. Some ransomware infections use ransom-demand messages as an introduction (see the WALDO ransomware text file below).

Identify ransomware-type infection (step 1)

This, however, is rare. In most cases, ransomware infections deliver more direct messages simply stating that data is encrypted and that victims must pay some sort of ransom. Note that ransomware-type infections typically generate messages with different file names (for example, "_readme.txt", "READ-ME.txt", "DECRYPTION_INSTRUCTIONS.txt", "DECRYPT_FILES.html", etc.). Therefore, using the name of a ransom message may seem like a good way to identify the infection. The problem is that most of these names are generic and some infections use the same names, even though the delivered messages are different and the infections themselves are unrelated. Therefore, using the message filename alone can be ineffective and even lead to permanent data loss (for example, by attempting to decrypt data using tools designed for different ransomware infections, users are likely to end up permanently damaging files and decryption will no longer be possible even with the correct tool).

Another way to identify a ransomware infection is to check the file extension, which is appended to each encrypted file. Ransomware infections are often named by the extensions they append (see files encrypted by Qewe ransomware below).

Identify ransomware-type infection (step 2)

This method is only effective, however, when the appended extension is unique - many ransomware infections append a generic extension (for example, ".encrypted", ".enc", ".crypted", ".locked", etc.). In these cases, identifying ransomware by its appended extension becomes impossible.

One of the easiest and quickest ways to identify a ransomware infection is to use the ID Ransomware website. This service supports most existing ransomware infections. Victims simply upload a ransom message and/or one encrypted file (we advise you to upload both if possible).

Identify ransomware-type infection (step 3)

The ransomware will be identified within seconds and you will be provided with various details, such as the name of the malware family to which the infection belongs, whether it is decryptable, and so on.

Example 1 (Qewe [Stop/Djvu] ransomware):

Identify ransomware-type infection (step 4)

Example 2 (.iso [Phobos] ransomware):

Identify ransomware-type infection (step 5)

If your data happens to be encrypted by a ransomware that is not supported by ID Ransomware, you can always try searching the internet by using certain keywords (for example, ransom message title, file extension, provided contact emails, cryptowallet addresses, etc.).

Search for ransomware decryption tools:

Encryption algorithms used by most ransomware-type infections are extremely sophisticated and, if the encryption is performed properly, only the developer is capable of restoring data. This is because decryption requires a specific key, which is generated during the encryption. Restoring data without the key is impossible. In most cases, cyber criminals store keys on a remote server, rather than using the infected machine as a host. Dharma (CrySis), Phobos, and other families of high-end ransomware infections are virtually flawless, and thus restoring data encrypted without the developers' involvement is simply impossible. Despite this, there are dozens of ransomware-type infections that are poorly developed and contain a number of flaws (for example, the use of identical encryption/decryption keys for each victim, keys stored locally, etc.). Therefore, always check for available decryption tools for any ransomware that infiltrates your computer.

Finding the correct decryption tool on the internet can be very frustrating. For this reason, we recommend that you use the No More Ransom Project and this is where identifying the ransomware infection is useful. The No More Ransom Project website contains a "Decryption Tools" section with a search bar. Enter the name of the identified ransomware, and all available decryptors (if there are any) will be listed.

Searching for ransomware decryption tools in nomoreransom.org website

Restore files with data recovery tools:

Depending on the situation (quality of ransomware infection, type of encryption algorithm used, etc.), restoring data with certain third-party tools might be possible. Therefore, we advise you to use EaseUS Data Recovery Wizard Pro. This tool supports over a thousand data types (graphics, video, audio, documents, etc.) and it is very intuitive (little knowledge is necessary to recover data).

▼ Download
EaseUS Data Recovery Wizard Pro

By downloading any software listed on this website you agree to our Privacy Policy and Terms of Use. Trial version of EaseUS Data Recovery Wizard Pro is capable of scanning drives and listing recoverable files - to restore them, you must purchase a license.

Step 1: Perform a scan.

Hover your mouse over the partition you wish to scan and select "Scan". You can also select a specific folder, or click shortcut icons to scan the Desktop or Recycle Bin: Scanning the storage drive with EaseUS Data Recovery Wizard PRO (step 1)

Wait for EaseUS Data Recovery Wizard Pro to complete the scan. The scanning duration depends on the volume of files (both in quantity and size) that you are scanning (for example, several hundreds gigabytes could take over an hour to scan). Therefore, be patient during the scanning process. We also advise against modifying or deleting existing files, since this might interfere with the scan. If you add additional data (for example, downloading files/content) while scanning, this will prolong the process: Scanning the storage drive with EaseUS Data Recovery Wizard PRO (step 2)

Step 2: Recover data.

Once the process is complete, select the folders/files you wish to restore and simply click "Recover". Note that some free space on your storage drive is necessary to restore data. Note also that the trial version of EaseUS Data Recovery Wizard Pro is only capable of scanning drives and listing recoverable files - to restore them, you must purchase a license: Recovering data with EaseUS Data Recovery Wizard Pro

Step 3: Save the scan session (optional).

We recommend that you save the scanning session once you have completed recovery, in case you decide to recover additional files later. Simply click the "Save Scan Session" icon in the upper-right corner of the screen and choose the location for the file to be saved. This will save a lot of time, since you will not need to re-scan the storage drive the next time you wish to restore something. Bear in mind, however, that data removed after the scanning session has finished will not be listed: Saving scan session in EaseUS Data Recovery Wizard Pro

Create data backups:

Proper file management and creating backups is essential for data security. Therefore, always be very careful and think ahead.

Partition management: We recommend that you store your data in multiple partitions and avoid storing important files within the partition that contains the entire operating system. If you fall into a situation whereby you cannot boot the system and are forced to format the disk on which the operating system is installed (in most cases, this is where malware infections hide), you will lose all data stored within that drive. This is the advantage of having multiple partitions: if you have the entire storage device assigned to a single partition, you will be forced to delete everything, however, creating multiple partitions and allocating the data properly allows you to prevent such problems. You can easily format a single partition without affecting the others - therefore, one will be cleaned and the others will remain untouched, and your data will be saved. Managing partitions is quite simple and you can find all necessary information on Microsoft's documentation web page.

Data backups: The most reliable backup method is to use an external storage device and keep it unplugged. Copy your data to an external hard drive, flash (thumb) drive, SSD, HDD, or any other storage device, unplug it and store it in a dry place away from sun and extreme temperatures. This method is, however, quite inefficient, since data backups and updates need to be made regularly. You can also use a cloud service or remote server. Here, an internet connection is required and there is always the chance of a security breach. Therefore, you should consider using an application to create data backups locally.

▼ Download
EaseUS Todo Backup

By downloading any software listed on this website you agree to our Privacy Policy and Terms of Use. To use full-featured product, you have to purchase a license for EaseUS Todo Backup. 30 days free trial available.

We recommend using the EaseUS Todo Backup application. The "Home" edition of EaseUS Todo Backup is usually more than adequate for regular users, however, the "Business" edition is more suitable for companies and large computer networks. The EaseUS Todo Backup application provides extensive data protection features. You can easily create backups, and encrypt and compress them for enhanced protection and storage saving purposes. It also allows you to set backup schedules, create bootable devices, and restore the system if a crash occurs. You can easily choose where to store the created backup: locally; uploaded to an external drive; FTP; cloud storage, or elsewhere. In summary, EaseUS Todo Backup is an all-in-one tool, which provides all features required to properly backup your data.

Creating a data backup:

The backup process is virtually identical regardless of the item (file, partition, entire system) you wish to backup. Taking the File Backup feature as an example:

Step 1: Choose which item to backup.

Click on the "Menu" icon in the upper-left corner of the screen to reveal the menu and select "File Backup": Creating data backups with EaseUS Todo Backup tool (step 1)

Select the files you want to backup. You can also enter a name and description of the backup that will be created: Creating data backups with EaseUS Todo Backup tool (step 2)

Step 2: Change the default settings.

The EaseUS Todo Backup application provides a variety of additional options that can be added/modified while creating the backup. For example, you can encrypt data (add a password), select the compression rate (how much the backup should be compressed), performance (how many system resources should be allocated), add an email notification (you receive an email once the process is complete) and so on.

To open the options window, click the "Backup options" button in the lower-left corner of the screen: Creating data backups with EaseUS Todo Backup tool (step 3)

Select the settings you want to change and click "Save". You can also reset your changes by clicking "Reset to initial settings": Creating data backups with EaseUS Todo Backup tool (step 4)

Step 3: Select the backup destination.

As mentioned above, EaseUS Todo Backup allows you to choose where backups are saved - locally or externally.

Click the "Browse..." button and select the location you want the backup to be saved: Creating data backups with EaseUS Todo Backup tool (step 5)

Step 4: Safety measures and process completion.

Depending on the location you have chosen, there are a number of measures you should or should not take. If you are uploading to an internet-connected location (for example, Cloud storage, FTP, etc.), be sure to maintain your internet connection, otherwise you will have to start again. The same applies to external storage devices - do not unplug them until the process is complete.

The progress bar displays estimated time remaining until completion. Large backups (hundreds of gigabytes) can take hours to create (depending on storage device speed, internet connection, etc.). Therefore, the application also allows you to optionally choose what the system should do (shut down, sleep or hibernate) once the process has finished: Creating data backups with EaseUS Todo Backup tool (step 6)

The best way to avoid damage from ransomware infections is to maintain regular up-to-date backups.

About the author:

Tomas Meskauskas

Tomas Meskauskas - expert security researcher, professional malware analyst.

I am passionate about computer security and technology. I have an experience of over 10 years working in various companies related to computer technical issue solving and Internet security. I have been working as an author and editor for pcrisk.com since 2010. Follow me on Twitter and LinkedIn to stay informed about the latest online security threats. Contact Tomas Meskauskas.

PCrisk security portal is brought by a company RCS LT. Joined forces of security researchers help educate computer users about the latest online security threats. More information about the company RCS LT.

Our malware removal guides are free. However, if you want to support us you can send us a donation.

Malware activity

Global malware activity level today:

Medium threat activity

Increased attack rate of infections detected within the last 24 hours.

QR Code
NEMTY 2.5 REVENGE virus QR code
A QR code (Quick Response Code) is a machine-readable code which stores URLs and other information. This code can be read using a camera on a smartphone or a tablet. Scan this QR code to have an easy access removal guide of NEMTY 2.5 REVENGE virus on your mobile device.
We Recommend:

Get rid of Windows malware infections today:

▼ REMOVE IT NOW
Download Malwarebytes

Platform: Windows

Editors' Rating for Malwarebytes:
Editors ratingOutstanding!

[Back to Top]

To use full-featured product, you have to purchase a license for Malwarebytes. 14 days free trial available.