RansomwareRemoval Guide

Remove Lesli Virus (+Decrypt .Lesli files) – CryptoMix Ransomware

Lesli – Ransomware

The Lesli stands for a ransomware-type infection. The virus comes from the CryptoMix ransomware family. Lesli was elaborated particularly to encrypt all major file types. When the file is encrypted people are not able to use them. Lesli adds the “.Lesli” extension for each file encrypted by it. For example, the file “myphoto.jpg“, once encrypted by Lesli, will be renamed into “myphoto.jpg.Lesli“. As quickly as the encryption is finished, Lesli places a special text file into every folder containing the encrypted data.

The message given by Lesli text file requesting for the ransom is definitely the like the statements given by other ransomware representatives belonging to the CryptoMix clan. It actually mentions that the information is encrypted which the only way to restore it is to use a a distinct decryption key. Sadly, this is absolutely true. The type of cryptography mechanism applied by Lesli is still not appropriately examined. Still, it is definitely specific that each victim might be given the specific decryption key, which is completely distinct. It is difficult to bring back the files without the key available.

Another technique of Lesli is that the victims cannot access to the key. The key is kept on a specific server run by the frauds associated with Lesli ransomware. To get the key and recover the important information people need to pay the ransom.

Nevertheless, irrespective of the requested amount, people must stay away from paying the ransom virus. Cyber frauds are not fair, so they tend to completely disregard what their victims feel about the problem, even when the payment reaches their pockets. This is why paying the ransom typically does not give any positive result and people just lose their money for absolutely nothing.

We strongly encourage that you do not contact these crooks and certainly do not transfer money into their accounts. It is said to admit that there are no utilities able to crack Lesli ransomware and to recover the data data for free. Thus, the just best decision is to recover the lost data from the available backup.

Virus Summary

NameLesli Ransomware
File Extension.Lesli
Short DescriptionThe ransomware encrypts all the data stored on your system and requires a ransom to be paid on your part supposedly to recover your important files.
SymptomsFile encryption by the ransomware is performed by means of the AES and RSA encryption algorithms. Once the encryption is completed, the ransomware adds its special Lesli extension to all the files modified by it.
Distribution MethodSpam Emails, Email Attachments
Removal Tool   GridinSoft Anti-Malware

Keep in mind that the internet is now overwhelmed with threats that look similar to Lesli ransomware. Harmful programs of such kind are generally elaborated to encrypt crucial data and to state the need before the user to pay the ransom. The peculiarity of all such ransomware threats is that all apply a comparable algorithm to generate the unique decryption key for information decryption.

Thus, as long as the ransomware is still being developed or has some hidden bugs, manually recovering the information is simply not feasible. The only way to prevent the loss of your crucial information is to regularly create backups of your important information.

Bear in mind that even if you create such backups, they need to be put into a special storage utility not connect to your main PC. You may use the USB Memory Stick or external hard disk drive for this purpose, or refer to the help of the cloud storage. If you keep your backup files on your common system they may be encrypted in addition to other files, so it’s definitely not a good storage location.

How did ransomware infect my computer?

There are numerous methods used by online frauds to distribute Lesli ransomware. Even though it is uncertain how precisely Lesli injects your system, there are some leaks through which it may infiltrate the system:

  • integration with third-party apps, especially freeware;
  • spam emails from unknown senders;
  • sites rendering free hosting services;
  • pirated peer-to-peer (P2P) downloads.

Often Lesli ransomware might be presented as some genuine software, for instance, in the pop-ups instructing users to carry out some essential software updates. This is the common technique used by online frauds to persuade people into downloading and installing Lesli infection manually, by ways of their direct participation in the installation process.

Additionally, the criminals might refer to numerous e-mail spam strategies to inject destructive codes into systems. So, they may refer to to sending unsolicited spam emails with tricky notices promoting users to download the attachments or click on certain download links, for example, the ones encouraging users to open some receipts, documents, tax reports or invoices.

Needless to mention, opening such documents or clicking on such dangerous links may significantly harm the system. Fictitious Adobe Flash Player update notifies may result in Lesli ransom injection. As for the cracked applications, these illegally downloaded programs may likewise contain malicious codes leading to Lesli secret installation. Lastly, injection of Lesli may happen by means of Trojans that privately get injected into the system and install malicious utilities without the user’s permission.

Is there any way to prevent the injection of Lesli ransomware?

Even though there is no 100% guarantee to avoid your PC from getting infected, there are some pieces of suggestions we want to share with with you. First of all, be very cautious when you surf the web and specifically while downloading free apps. Keep away from opening suspicious email attachments, especially when the sender of the email is not familiar to you.

Keep in mind that some freeware installers may include other unwanted utilities in the bundle, so they may be harmful. Make sure that your current anti-virus and your entire operating system is always appropriately updated.

Obviously, downloading pirated software is unlawful and may result in necessary damage to be produced your PC. For this reason, stay away from downloading cracked software. You are likewise strongly advised to reconsider your existing security software and perhaps switch to another security solution that can render much better services of defending your computer.

Below please find the quotation from the Lesli text file:


All of you files are encrypted with RSA-2048.
More information about the RSA can be found here:

Decrypting of  files is only possible with the private key and decrypt program, which is on our server.
To receive your private key:
Contact us by email , send us an email your (personal identification) ID number and wait for further instructions.
Our specialist will contact you within 24 hours.

 supl0@post.com - SUPPORT;
 supl0@oath.com - SUPPORT RESERVE;

Please do not waste your time!  You have 72 hours only! After that  server  double your price!

Your personal identification ID: 4dfb70f41e857d00


Screenshot of files with “.Lesli” extension added by the ransomware:
Lesli Ransomware - encrypt files with .Lesli extension

Use GridinSoft Anti-Malware to remove Lesli ransomware from your computer

1.Download GridinSoft Anti-Malware.

You can download GridinSoft Anti-Malware by clicking the button below:

  GridinSoft Anti-Malware

2. Double-click on the setup file.

When setup file has finished downloading, double-click on the setup-antimalware-ag.exe file to install GridinSoft Anti-Malware on your computer.
GridinSoft Anti-Malware
An User Account Control asking you about to allow GridinSoft Anti-Malware to make changes to your device. So, you should click “Yes” to continue with the installation.
GridinSoft Anti-Malware Setup

3. Press Install button for run GridinSoft Anti-Malware.

GridinSoft Anti-Malware Install

3.Once installed, GridinSoft Anti-Malware will automatically run.

GridinSoft Anti-Malware  Start

4. Wait for the GridinSoft Anti-Malware scan to complete.

GridinSoft Anti-Malware will automatically start scanning your computer for Win Speedup 2018 and other malicious programs. This process can take a 20-30 minutes, so we suggest you periodically check on the status of the scan process.
GridinSoft Anti-Malware Scan

5. Click on “Clean Now”.

When the scan has completed, you will see the list of infections that GridinSoft Anti-Malware has detected. To remove them click on the “Clean Now” button in right corner.
GridinSoft Anti-Malware Scan Result

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Daniel Zimmermann

Daniel Zimmermann has been writing on security and malware subjects for many years and has been working in the security industry for over 10 years. Daniel was educated at the Saarland University in Saarbrücken, Germany and currently lives in New York.

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