This article is created with instructions to aid you to remove CryptoMix ransomware and try to restore .lesli encrypted files.
A ransomware virus, believed to be part of the CryptoMix malware family is believed to cause some infections and encrypt the files of the infected computers, asking ransom money in a text, named “INSTRUCTION RESTORE FILE.TXT”. In those instructions, the approximate sum of 0.5 to 1.5 BTC may be requested from the victims to pay to get a decryptor for the encoded files. In case you have become a victim of the .lesli virus, we advise you not to perform any payment or communication with the cyber-criminals and instead to focus on removing the malware and encrypting files encoded by this malware by yourself.
Threat Summary
Name | .lesli CryptoMix |
File Extension | .lesli |
Type | Ransomware, Cryptovirus |
Short Description | The ransomware encrypts files on your computer system and demands a ransom to be paid to allegedly recover them. |
Symptoms | The user may witness ransom notes and “instructions” linking to an e-mail for contact. Changed file-extension has been used to .lesli. |
Ransom Demanding Note | README_files.txt |
Distribution Method | Via an Exploit kit, Dll file attack, malicious JavaScript or a drive-by download of the malware itself in an obfuscated manner. |
Detection Tool |
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User Experience | Join Our Forum to Discuss .lesli CryptoMix. |
The .lesli Virus – Update April 2020
Lesli software is malicious and is a ransomware virus type. It continues to plague users’ computers even in April 2020. Not much has changed since it first emerged almost four years ago, but we now have a fresh variant of its ransom note. It is still named INSTRUCTION RESTORE FILE.TXT and it looks like the following:
The text states:
— INSTRUCTION RESTORE FILE —
All of you files are encrypted with RSA-2048.
More information about the RSA can be found here:
https://en.wikipedia.org/wiki/RSA_(cryptosystem)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.E-MAILS:
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
^_- LESLI SPYING ON YOU -_-
This is yet another evidence of how malware and viruses can remain active over many years and still search for the next victim.
How .lesli CryptoMix Ransomware Infects
For it to cause a successful infection, the criminals behind CryptoMix .lesli threat might perform several different actions. One of those is to obfuscate a malicious code or file and disguise it as a legitimate file for the file to fool an inexperienced user into opening it. This is achievable via the usage of socially engineered phishing e-mails containing fraudulent information, like the victim’s need to check his bank account balance sheet, for example. Opening the attachment results in the activating of a malicious script without Windows Firewall or any other defensive software detecting it (in most cases). After this is done, the virus begins to drop malicious files with different names in several Windows folders that contain different names:
CryptoMix .lesli Ransomware – Post-Infection Activity
As soon as the malicious files are dropped on your computer by the .lesli Infection module, the malware may begin to encrypt files of the following file types:
→ .sql, .mp4, .7z, .rar, .m4a, .wma, .avi, .wmv, .csv, .d3dbsp, .zip, .sie, .sum, .ibank, .t13, .t12, .qdf, .gdb, .tax, .pkpass, .bc6, .bc7, .bkp, .qic, .bkf, .sidn, .sidd, .mddata, .itl, .itdb, .icxs, .hvpl, .hplg, .hkdb, .mdbackup, .syncdb, .gho, .cas, .svg, .map, .wmo, .itm, .sb, .fos, .mov, .vdf, .ztmp, .sis, .sid, .ncf, .menu, .layout, .dmp, .blob, .esm, .vcf, .vtf, .dazip, .fpk, .mlx, .kf, .iwd, .vpk, .tor, .psk, .rim, .w3x, .fsh, .ntl, .arch00, .lvl, .snx, .cfr, .ff, .vpp_pc, .lrf, .m2, .mcmeta, .vfs0, .mpqge, .kdb, .db0, .dba, .rofl, .hkx, .bar, .upk, .das, .iwi, .litemod, .asset, .forge, .ltx, .bsa, .apk, .re4, .sav, .lbf, .slm, .bik, .epk, .rgss3a, .pak, .big, wallet, .wotreplay, .xxx, .desc, .py, .m3u, .flv, .js, .css, .rb, .png, .jpeg, .txt, .p7c, .p7b, .p12, .pfx, .pem, .crt, .cer, .der, .x3f, .srw, .pef, .ptx, .r3d, .rw2, .rwl, .raw, .raf, .orf, .nrw, .mrwref, .mef, .erf, .kdc, .dcr, .cr2, .crw, .bay, .sr2, .srf, .arw, .3fr, .dng, .jpe, .jpg, .cdr, .indd, .ai, .eps, .pdf, .pdd, .psd, .dbf, .mdf, .wb2, .rtf, .wpd, .dxg, .xf, .dwg, .pst, .accdb, .mdb, .pptm, .pptx, .ppt, .xlk, .xlsb, .xlsm, .xlsx, .xls, .wps, .docm, .docx, .doc, .odb, .odc, .odm, .odp, .ods, .odt.
After the encryption process has been completed, the virus may add a file extension that contains an e-mail address and the .lesli suffix. Files encrypted by .lesli remain locked until decrypted.
As soon as this has been completed, the .lesli virus may drop a .txt file, named “INSTRUCTION RESTORE FILE.TXT” that aims to notify the user of the situation and provide instructions on decrypting the files by paying a hefty ransom fee, which is highly inadvisable by malware researchers.
The .lesli Virus – Remove it and Try to Get the Files Back
To fully remove the ransomware from your computer, malware researchers strongly advise users to focus on using an advanced software for malware removal that will automatically take care of the threat. For this and more removal instructions, you may want to refer to the removal instructions below.
After having removed the .lesli CryptoMix variant, we have published several alternative methods in step “2. Restore files encrypted by .lesli CryptoMix” below, which aim to assist you in restoring at least some of the files. But, take into consideration backing up your files when you are performing this process because you may lose them forever by using some of the methods, like third-party decryptors, for example.
Attention! SensorsTechForum strongly recommends that all malware victims should look for assistance only by reputable sources. Many guides out there claim to offer free recovery and decryption for files encrypted by ransomware viruses. Be advised that some of them may only be after your money.
As a site that has been dedicated to providing free removal instructions for ransomware and malware since 2014, SensorsTechForum’s recommendation is to only pay attention to trustworthy sources.
How to recognize trustworthy sources:
- Always check "About Us" web page.
- Profile of the content creator.
- Make sure that real people are behind the site and not fake names and profiles.
- Verify Facebook, LinkedIn and Twitter personal profiles.
- Guide 1: How to Remove .lesli CryptoMix from Windows.
- Guide 2: Get rid of .lesli CryptoMix from Mac OS X.
How to Remove .lesli CryptoMix from Windows.
Step 1: Boot Your PC In Safe Mode to isolate and remove .lesli CryptoMix





Step 2: Uninstall .lesli CryptoMix and related software from Windows
Here is a method in few easy steps that should be able to uninstall most programs. No matter if you are using Windows 10, 8, 7, Vista or XP, those steps will get the job done. Dragging the program or its folder to the recycle bin can be a very bad decision. If you do that, bits and pieces of the program are left behind, and that can lead to unstable work of your PC, errors with the file type associations and other unpleasant activities. The proper way to get a program off your computer is to Uninstall it. To do that:



Step 3: Clean any registries, created by .lesli CryptoMix on your computer.
The usually targeted registries of Windows machines are the following:
- HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run
- HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
- HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\RunOnce
- HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\RunOnce
You can access them by opening the Windows registry editor and deleting any values, created by .lesli CryptoMix there. This can happen by following the steps underneath:



Before starting "Step 4", please boot back into Normal mode, in case you are currently in Safe Mode.
This will enable you to install and use SpyHunter 5 successfully.
Step 4: Scan for .lesli CryptoMix with SpyHunter Anti-Malware Tool
Step 5 (Optional): Try to Restore Files Encrypted by .lesli CryptoMix.
Ransomware infections and .lesli CryptoMix aim to encrypt your files using an encryption algorithm which may be very difficult to decrypt. This is why we have suggested a data recovery method that may help you go around direct decryption and try to restore your files. Bear in mind that this method may not be 100% effective but may also help you a little or a lot in different situations.
Simply click on the link and on the website menus on top, choose Data Recovery - Data Recovery Wizard for Windows or Mac (depending on your OS), and then download and run the tool.
Get rid of .lesli CryptoMix from Mac OS X.
Step 1: Uninstall .lesli CryptoMix and remove related files and objects
1. Hit the ⇧+⌘+U keys to open Utilities. Another way is to click on “Go” and then click “Utilities”, like the image below shows:
- Go to Finder.
- In the search bar type the name of the app that you want to remove.
- Above the search bar change the two drop down menus to “System Files” and “Are Included” so that you can see all of the files associated with the application you want to remove. Bear in mind that some of the files may not be related to the app so be very careful which files you delete.
- If all of the files are related, hold the ⌘+A buttons to select them and then drive them to “Trash”.
In case you cannot remove .lesli CryptoMix via Step 1 above:
In case you cannot find the virus files and objects in your Applications or other places we have shown above, you can manually look for them in the Libraries of your Mac. But before doing this, please read the disclaimer below:
You can repeat the same procedure with the following other Library directories:
→ ~/Library/LaunchAgents
/Library/LaunchDaemons
Tip: ~ is there on purpose, because it leads to more LaunchAgents.
Step 3 (Optional): Try to Restore Files Encrypted by .lesli CryptoMix.
Ransomware infections and .lesli CryptoMix aim to encrypt your files using an encryption algorithm which may be very difficult to decrypt. This is why we have suggested a data recovery method that may help you go around direct decryption and try to restore your files. Bear in mind that this method may not be 100% effective but may also help you a little or a lot in different situations.
Simply click on the link and on the website menus on top, choose Data Recovery - Data Recovery Wizard for Windows or Mac (depending on your OS), and then download and run the tool.
.lesli CryptoMix FAQ
What is .lesli CryptoMix ransomware and how does it work?
.lesli CryptoMix is a ransomware infection - the malicious software that enters your computer silently and blocks either access to the computer itself or encrypt your files.
Many ransomware viruses use sophisticated encryption algorithm how to make your files inaccessible. The goal of ransomware infections is to demand that you pay a ransom payment to get access to your files back.
How does .lesli CryptoMix ransomware infect my computer?
Via several ways..lesli CryptoMix Ransomware infects computers by being sent via phishing e-mails, containing virus attachment.
This attachment is usually masked as an important document, like an invoice, bank document or even a plane ticket and it looks very convincing to users.
After you download and execute this attachment, a drive-by download occurs and your computer is infected with the ransomware virus.
Another way, you may become a victim of .lesli CryptoMix is if you download a fake installer, crack or patch from a low reputation website or if you click on a virus link. Many users report getting a ransomware infection by downloading torrents.
How to open ..lesli CryptoMix files?
You can't. At this point the ..lesli CryptoMix files are encrypted. You can only open them once they are decrypted.
Decryptor did not decrypt my data. What now?
Do not panic and backup the files. If a decryptor did not decrypt your ..lesli CryptoMix files successfully, then do not despair, because this virus is still new.
One way to restore files, encrypted by .lesli CryptoMix ransomware is to use a decryptor for it. But since it's a new virus, advised that the decryption keys for it may not be out yet and available to the public. We will update this article and keep you posted as soon as this decryptor is released.
How Do I restore "..lesli CryptoMix" files (Other Methods)?
Yes, sometimes files can be restored. We have suggested several file recovery methods that could work if you want to restore ..lesli CryptoMix files.
These methods are in no way 100% guarantee that you will be able to get your files back. But if you have a backup, your chances of success are much greater.
How do I get rid of .lesli CryptoMix ransomware virus?
The safest way and the most efficient one for the removal of this ransomware infection is the use a professional anti malware software. It will scan for and locate .lesli CryptoMix ransomware and then remove it without causing any additional harm to your important ..lesli CryptoMix files.
Also, keep in mind that viruses like .lesli CryptoMix ransomware also install Trojans and keyloggers that can steal your passwords and accounts. Scanning your computer with an anti-malware software will make sure that all of these virus components are removed and your computer is protected in the future.
What to Do If nothing works?
There is still a lot you can do. If none of the above methods seem to work for you, then try these methods:
- Try to find a safe computer from where you can can login on your own line accounts like One Drive, iDrive, Google Drive and so on.
- Try to contact your friends, relatives and other people so that they can check if they have some of your important photos or documents just in case you sent them.
- Also, check if some of the files that were encrypted it can be re-downloaded from the web.
- Another clever way to get back some of your files is to find another old computer, a flash drive or even a CD or a DVD where you may have saved your older documents. You might be surprised what will turn up.
- You can also go to your email account to check if you can send any attachments to other people. Usually what is sent the email is saved on your account and you can re-download it. But most importantly, make sure that this is done from a safe computer and make sure to remove the virus first.
More tips you can find on our forums, where you can also asks any questions about your ransomware problem.