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LambdaLocker Ransomware – Remove and Restore .lambda_l0cked Files

This article will aid you to remove LambdaLocker ransomware completely. Follow the ransomware removal instructions given at the bottom of the article.

LambdaLocker ransomware is a cryptovirus which has been targeting mainly Chinese users, according to malware researchers. Your files will get encrypted and receive the .lambda_l0cked extension after the encryption process is done. Afterward, the LambdaLocker ransomware displays a ransom note with instructions for paying the ransom. Read through to see with what ways you can try to potentially restore some of your files.

Threat Summary

Name LambdaLocker
Type Ransomware
Short Description The ransomware encrypts files on your computer allegedly with AES-256 and SHA-256 encryption algorithms.
Symptoms The ransomware will encrypt your files and put the .lambda_l0cked extension on all files after encryption completes.
Distribution Method Spam Emails, Email Attachments
Detection Tool See If Your System Has Been Affected by malware


Malware Removal Tool

User Experience Join Our Forum to Discuss LambdaLocker.
Data Recovery Tool Windows Data Recovery by Stellar Phoenix Notice! This product scans your drive sectors to recover lost files and it may not recover 100% of the encrypted files, but only few of them, depending on the situation and whether or not you have reformatted your drive.

LambdaLocker Ransomware – Distribution

The LambdaLocker ransomware can be distributed by utilizing various methods. The most common way of distribution is probably by a file that drops the payload of the ransomware, which contains the malicious script of the virus.

LambdaLocker could also be distributing that payload dropper on social media networks and file-sharing sites. Freeware programs found on the Web could be promoted as helpful but also could be hiding the downloader for the payload. Do not open files right after you have downloaded them, especially if they come from a suspicious source, like an e-mail from an unknown sender. Instead, you should first scan those files with a security program and check their size and signatures for each of file for anything that seems unusual. You should read the tips for preventing ransomware topic.

LambdaLocker Ransomware – Information

LambdaLocker ransomware is also a cryptovirus. China seems to be the primary country that it is currently targeting, according to malware researchers. There is also the evidence that the ransom note has a variant written in the Chinese language. That doesn’t mean that other countries are excluded from its crosshairs – everybody can become a victim. The ransomware will encrypt files on your computer system and append the same extension to all of them when the encryption process finishes.

LambdaLocker ransomware could make new entries in the Windows Registry to achieve perseverance. Those registry entries are usually placed for the reason to start the virus automatically with each boot of the Windows Operating System.

The ransom note will appear after the encryption process is fully completed. The note states what the demands of the cybercriminals are, like what is the price of the ransom and all other instructions for decrypting your data. The note is contained in a file called READ_IT.hTmL. You can preview the ransom note in the screenshot provided down below:

The ransom note reads:

Your files are encrypted by the LambdaLocker.
Your ID: [Redacted] We used AES-256 and SHA-256 cipher to encrypt. So DO NOT try to crack your files.
The way to DECRYPT:
Step1: pay 0.5 Bitcoin to 1MJod*** (Case Sensitive, Please copy this address) in 1 month.
Step2: send an E-MAIL to lambdasquad.hl@yandex.com after you finish step 1
Subject: decryptLL
Body: [Your ID]P05 (Example:[1234-1234-1234]P05)
Step3: Please wait. We will send the decrypter and the key to you in 3 hours.
How to get Bitcoins and pay?
1. Register a Bitcoin Trade Platform.
2. Buy Bitcoins through the platform.
3. Pay 0.5 Bitcoins to 1MJodDvhmNG9ocRhhwvBzkGmttXP9ow7e2 and follow the decrypt step.
If you can’t understand, please Google: How can I buy and pay bitcoin?
Bitcoin Trade Platform recommend:
1. HuoBi (火币,China): https://www.huobi.com/
2. BtcTrade (China): https://www.btctrade.com
3. OKCoin: https://www.okcoin.cn/
4. Bter: https://bter.com/
5. JuBi (聚币,China): https://www.jubi.com/
6. Btc100 (China): https://www.btc100.cn/
7. BTC-e: https://btc-e.com/
8. Bitstamp: https://www.bitstamp.net/
9. GDAX: https://www.gdax.com/
10. CEX: https://cex.io/
Or you can use others.
If you have any questions, please e-mail lambdasquad.hl@yandex.com.

The note for Chinese users reads the following:

您的ID : 4530-1099-2139-5329
第一步:在一个月内支付0.5比特币到地址 1MJodDvhmNG9ocRhhwvBzkGmttXP9ow7e2 (区分大小写,请完整地复制)
第二步:完成第一步之后,发送邮件到 lambdasquad.hl@yandex.com
邮件内容:[您的ID]P05 (举例:[1234-1234-1234]P05)

The criminals that stand behind the LambdaLocker ransomware virus want 0.5 BitCoin for decryption, which is a bit more than 400 US dollars. You should NOT under any circumstances pay these criminals. Nobody can guarantee if your files will get restored back to normal. Plus, you should not ever give money to criminals, as this will probably just support them and inspire them to make other ransomware viruses or do more criminal activities.

At this time, there is no existing list with file extensions that the LambdaLocker ransomware searches to encrypt. The article will get updated if any information on that matter surfaces.

Each file that gets encrypted will receive the same extension appended to each of them, which is .lambda_l0cked. The encryption algorithm is a mixture of the 256-bit AES and 256-bit SHA algorithms or at least, that is what is says in the ransom note.

The LambdaLocker cryptovirus is very likely to delete the Shadow Volume Copies from the Windows operating system by using this command in the Command Prompt:

→vssadmin.exe delete shadows /all /Quiet

Keep on reading and check out what kind of ways you can try to potentially restore some of your data.

Remove LambdaLocker Ransomware and Restore .lambda_l0cked Files

If your computer got infected with the LambdaLocker ransomware virus, you should have a bit of experience in removing malware. You should get rid of this ransomware as quickly as possible before it can have the chance to spread further and infect other computers. You should remove the ransomware and follow the step-by-step instructions guide provided below.

Berta Bilbao

Berta is a dedicated malware researcher, dreaming for a more secure cyber space. Her fascination with IT security began a few years ago when a malware locked her out of her own computer.

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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.


with Anti-Malware
We recommend you to download SpyHunter and run free scan to remove all virus files on your PC. This saves you hours of time and effort compared to doing the removal yourself.
SpyHunter 5 free remover allows you, subject to a 48-hour waiting period, one remediation and removal for results found. Read EULA and Privacy Policy

Windows Mac OS X

How to Remove LambdaLocker from Windows.

Step 1: Boot Your PC In Safe Mode to isolate and remove LambdaLocker


Manual Removal Usually Takes Time and You Risk Damaging Your Files If Not Careful!
We Recommend To Scan Your PC with SpyHunter

Keep in mind, that SpyHunter’s scanner is only for malware detection. If SpyHunter detects malware on your PC, you will need to purchase SpyHunter's malware removal tool to remove the malware threats. Read our SpyHunter 5 review. Click on the corresponding links to check SpyHunter's EULA, Privacy Policy and Threat Assessment Criteria

1. Hold Windows key() + R

2. The "Run" Window will appear. In it, type "msconfig" and click OK.

3. Go to the "Boot" tab. There select "Safe Boot" and then click "Apply" and "OK".
Tip: Make sure to reverse those changes by unticking Safe Boot after that, because your system will always boot in Safe Boot from now on.

4. When prompted, click on "Restart" to go into Safe Mode.

5. You can recognise Safe Mode by the words written on the corners of your screen.

Step 2: Uninstall LambdaLocker 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:

1. Hold the Windows Logo Button and "R" on your keyboard. A Pop-up window will appear.

2. In the field type in "appwiz.cpl" and press ENTER.

3. This will open a window with all the programs installed on the PC. Select the program that you want to remove, and press "Uninstall"
Follow the instructions above and you will successfully uninstall most programs.

Step 3: Clean any registries, created by LambdaLocker 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 LambdaLocker there. This can happen by following the steps underneath:

1. Open the Run Window again, type "regedit" and click OK.

2. When you open it, you can freely navigate to the Run and RunOnce keys, whose locations are shown above.

3. You can remove the value of the virus by right-clicking on it and removing it.
Tip: To find a virus-created value, you can right-click on it and click "Modify" to see which file it is set to run. If this is the virus file location, remove the value.

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 LambdaLocker with SpyHunter Anti-Malware Tool

1. Click on the "Download" button to proceed to SpyHunter's download page.

It is recommended to run a scan before purchasing the full version of the software to make sure that the current version of the malware can be detected by SpyHunter. Click on the corresponding links to check SpyHunter's EULA, Privacy Policy and Threat Assessment Criteria.

2. After you have installed SpyHunter, wait for it to update automatically.


3. After the update process has finished, click on the 'Malware/PC Scan' tab. A new window will appear. Click on 'Start Scan'.


4. After SpyHunter has finished scanning your PC for any files of the associated threat and found them, you can try to get them removed automatically and permanently by clicking on the 'Next' button.


If any threats have been removed, it is highly recommended to restart your PC.

Step 5 (Optional): Try to Restore Files Encrypted by LambdaLocker.

Ransomware infections and LambdaLocker 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.

1. Download the reccomended Data Recovery software by clicking on the link underneath:

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.

Windows Mac OS X

Get rid of LambdaLocker from Mac OS X.

Step 1: Uninstall LambdaLocker and remove related files and objects

Manual Removal Usually Takes Time and You Risk Damaging Your Files If Not Careful!
We Recommend To Scan Your Mac with SpyHunter for Mac
Keep in mind, that SpyHunter for Mac needs to purchased to remove the malware threats. Click on the corresponding links to check SpyHunter’s EULA and Privacy Policy

1. Hit the ⇧+⌘+U keys to open Utilities. Another way is to click on “Go” and then click “Utilities”, like the image below shows:

2. Find Activity Monitor and double-click it:

3. In the Activity Monitor look for any suspicious processes, belonging or related to LambdaLocker:

Tip: To quit a process completely, choose the “Force Quit” option.

4. Click on the "Go" button again, but this time select Applications. Another way is with the ⇧+⌘+A buttons.

5. In the Applications menu, look for any suspicious app or an app with a name, similar or identical to LambdaLocker. If you find it, right-click on the app and select “Move to Trash”.

6: Select Accounts, after which click on the Login Items preference. Your Mac will then show you a list of items that start automatically when you log in. Look for any suspicious apps identical or similar to LambdaLocker. Check the app you want to stop from running automatically and then select on the Minus (“-“) icon to hide it.

7: Remove any left-over files that might be related to this threat manually by following the sub-steps below:

  • 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 LambdaLocker 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:

Disclaimer! If you are about to tamper with Library files on Mac, be sure to know the name of the virus file, because if you delete the wrong file, it may cause irreversible damage to your MacOS. Continue on your own responsibility!

1: Click on "Go" and Then "Go to Folder" as shown underneath:

2: Type in "/Library/LauchAgents/" and click Ok:

3: Delete all of the virus files that have similar or the same name as LambdaLocker. If you believe there is no such file, do not delete anything.

You can repeat the same procedure with the following other Library directories:

→ ~/Library/LaunchAgents

Tip: ~ is there on purpose, because it leads to more LaunchAgents.

Click the button below below to download SpyHunter for Mac and scan for LambdaLocker:


SpyHunter for Mac

Step 3 (Optional): Try to Restore Files Encrypted by LambdaLocker.

Ransomware infections and LambdaLocker 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.

1. Download the reccomended Data Recovery software by clicking on the link underneath:

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.

LambdaLocker FAQ

What is LambdaLocker ransomware and how does it work?

LambdaLocker 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 LambdaLocker ransomware infect my computer?

Via several ways.LambdaLocker 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 LambdaLocker 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 .LambdaLocker files?

You can't. At this point the .LambdaLocker 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 .LambdaLocker files successfully, then do not despair, because this virus is still new.

One way to restore files, encrypted by LambdaLocker 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 ".LambdaLocker" files (Other Methods)?

Yes, sometimes files can be restored. We have suggested several file recovery methods that could work if you want to restore .LambdaLocker 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 LambdaLocker 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 LambdaLocker ransomware and then remove it without causing any additional harm to your important .LambdaLocker files.

Also, keep in mind that viruses like LambdaLocker 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.

How to Report Ransomware to Authorities?

In case your computer got infected with a ransomware infection, you can report it to the local Police departments. It can help authorities worldwide track and determine the perpetrators behind the virus that has infected your computer. Below, we have prepared a list with government websites, where you can file a report in case you are a victim of a cybercrime:

Cyber-security authorities, responsible for handling ransomware attack reports in different regions all over the world:

Reports may be responded to in different timeframes, depending on your local authorities.

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