Lapsus$ Group (.locked) ransomware virus – removal and decryption options

Also Known As: Lapsus$ Group virus
Damage level: Severe

What kind of malware is Lapsus$ Group?

Our researchers discovered the Lapsus$ Group ransomware while investigating new malicious file submissions to the VirusTotal website. It operates by encrypting files to demand ransoms for their decryption.

After launching an executable of this malware on our testing system, we learned that the names of encrypted files are appended with a ".locked" extension. For example, an original filename like "1.jpg" appeared as "1.jpg.locked", "2.png" as "2.png.locked", and so on.

Once the encryption process was completed, a ransom-demanding message was displayed in a pop-up window. The note was in French, and it made claims regarding data theft (double-extortion tactics).

It is worth noting that this ransomware has nothing to do with the Lapsus$ cybercriminal group. It is likely to the developers of this ransomware use their name for bigger exposure or in attempt to create an impression of a high-level attack.

Screenshot of files encrypted by Lapsus$ Group ransomware:

Files encrypted by Lapsus$ Group ransomware (.locked extension)

Ransom note overview

According to a rough translation, the ransom note informs the victim that most of their files have been rendered inaccessible through encryption.

The message states that the sole method of data recovery is to pay the attackers. The ransom is 65 EUR (later contradicted by the note, where it is listed as 50 EUR) in Bitcoin cryptocurrency. Should the victim delay paying for two days, the sum will increase to 500 EUR.

Once the payment is made, the victim is promised to be sent the decryption key within four hours. Refusing to meet the ransom demands will lead to the victim's personal information (e.g., photos, files, passwords, etc.) being leaked. Additionally, the victim is threatened with the encryption of system files, which would make the system nonoperational.

The message warns against closing the pop-up window, as well as restarting or shutting down the system – since that will render decryption impossible and result in permanent data loss.

Lapsus$ Group ransomware overview

Based on our considerable experience researching ransomware infections, we can conclude that decryption is usually impossible without the attackers' interference.

Furthermore, victims commonly do not receive the promised decryption keys and/or tools – despite meeting the ransom demands. Therefore, we strongly advise against it since data recovery is not guaranteed, and paying also supports this criminal activity.

To prevent Lapsus$ Group ransomware from further encryptions – it must be eliminated from the operating system. Unfortunately, removal will not restore already locked data. The only solution is to recover it from a backup (if one was made beforehand and is stored elsewhere).

The general advice for ensuring data safety is to keep backups in several separate locations, such as remote servers, unplugged storage devices, and others.

Ransomware examples

We have analyzed thousands of ransomware-type programs; SULINFORMATICAElectronicReadText, and Meduza are just some examples.

Malware within this classification operates practically the same throughout, i.e., it encrypts files and demands payment for the decryption. However, these programs have two major differences in-between – the cryptographic algorithms they use (symmetric or asymmetric) and the ransom size.

How did ransomware infect my computer?

Cyber criminals predominantly use phishing and social engineering techniques to spread malware (ransomware included).

Most common distribution methods include: drive-by (stealthy/deceptive) downloads, malicious attachments or links in spam emails/messages, online scams, malvertising, dubious download sources (e.g., freeware and third-party sites, Peer-to-Peer sharing networks, etc.), illegal software activation ("cracking") tools, pirated content, and fake updates.

What is more, some malicious programs can self-proliferate through local networks and removable storage devices (e.g., external hard drives, USB flash drives, etc.).

Malware is usually disguised as or bundled with ordinary programs/media. Infectious files come in various formats, e.g., archives (ZIP, RAR, etc.), executables (.exe, .run, etc.), documents (PDF, Microsoft Office, Microsoft OneNote, etc.), JavaScript, and so forth. When a malicious file is executed, run, or otherwise opened – the infection chain is initiated.

Threat Summary:
Name Lapsus$ Group virus
Threat Type Ransomware, Crypto Virus, Files locker
Encrypted Files Extension .locked
Ransom Demanding Message Text presented in the pop-up window
Ransom Amount 50€, 65€, or 500€ in Bitcoin cryptocurrency
Cyber Criminal Cryptowallet Address bc1qfklsmtpgafue63fk2r2yz4h79ec8dgvzsq8972 (Bitcoin)
Free Decryptor Available? No
Detection Names Avast (Win32:RansomX-gen [Ransom]), Combo Cleaner (Generic.Ransom.Hiddentear.A.EE9E9426), ESET-NOD32 (A Variant Of MSIL/Filecoder.AK), Kaspersky (HEUR:Trojan-Ransom.MSIL.Agent.gen), Microsoft (Ransom:MSIL/Ryzerlo.A), 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 Combo Cleaner.
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How to protect yourself from ransomware infections?

We highly recommend downloading only from official and trustworthy channels. Additionally, all programs must be activated and updated using functions/tools provided by genuine developers, as those obtained from third-parties may contain malware.

Another recommendation is to be careful while browsing since fraudulent and dangerous online content usually appears legitimate and innocuous. We also advise caution with incoming emails and other messages. Attachments or links found in suspect/irrelevant mail must not be opened, as they can be virulent.

We must emphasize the importance of having a reputable anti-virus installed and kept updated. Security software must be used to perform regular system scans and to remove detected threats/issues. If your computer is already infected with Lapsus$ Group, we recommend running a scan with Combo Cleaner Antivirus for Windows to automatically eliminate this ransomware.

Screenshot of Lapsus$ Group ransomware's pop-up window:

Lapsus$ Group ransomware ransom note (pop-up)

Text presented in this message:


Vos fichiers ont été cryptés.

Qu'est-il arrivé à mon pc ?
Félicitations, vous avez été touché par le ransomware Lapsus$ Ransomware.
Qu'est-ce que cela signifie ? Cela signifie que la quasi-totalité des fichiers de votre pc ont été cryptés (allez voir par vous même). Il est impossible de les ouvrir et les utiliser !

Comment récupérer mes fichiers ?
Parlons donc de la récupération de vos fichiers. Tout d'abord, ne perdez même pas votre temps avec des décrypteurs gratuits que vous trouverez sur internet.
Lapsus$ Ransomware utilise un cryptage 256 bits AES, ce qui signifie qu'il est impossible de forcer brutalement ou de tenter de récupérer vos fichiers. N'allez pas voir non plus un informaticien. Il est réellement impossible de décrypter les fichiers sans notre aide. Voici donc les étapes pour les récupérer:


Tout d'abord, n'éteignez et ne redémarrez surtout pas votre ordinateur car les fichiers resteront cryptés et vous ne pourrez plus les décrypter. Ne fermez pas non plus cette fenêtre car sans elle vous ne pourrez plus récupérer vos fichiers. Mettez votre pc à charger si il n'a plus de batterie pour éviter qu'il ne s'éteigne. Ce sont de vrais conseils !

Comment puis-je les récupérer ?
1. Allez sur le site Coinbase : hxxps://coinbase.com/ et créez-vous simplement un compte en ligne. Il est possible que le site vous demande de vérifier votre identité (avec votre carte d'identité).

2. Achetez 65€ en bitcoins en utilisant l'option d'achat de crypto. Vous pourrez utiliser votre CB ou Paypal.

3. Envoyez ces 65€ en bitcoins à l'adresse en bas de cette fenêtre (faites un copié-collé et ne vous trompez pas).

4. Après avoir envoyé l'argent. Appuyez sur le bouton "Payer" et coller l'ID de la transaction que vous trouverez.

5. Attendez environ 4 heures, nous vous enverrons votre clé de décryption qui pourra être utilisée pour décrypter tous les fichiers. Vous n'aurez plus qu'à cliquer sur le bouton "Décrypter" et à coller la clé.

6. Il est possible d'acheter des bitcoins sur d'autres sites (comme bitpay.com ou binance.com). Si vous n'arrivez pas à acheter des bitcoins, suivez des tutos sur Internet. Il y en a plein et ce n'est vraiment pas difficile.


Vous avez une 2 jours, après ce délai le décryptage de vos fichiers passera à 500€.
Le défaut de paiement entraînera la divulgation de vos données personnelles sur internet tel que:
- Mot de passes, images et dossiers, qui ont été récupérés grâce au virus.
Et aussi mais surtout le cryptage des fichiers du système d'exploitation windows et donc la mise hors-service du pc (vous ne pourrez plus l'utiliser, votre pc sera tout simplement inutilisable).

Pour information, vous avez été infecté il y a environ 2 semaines en cliquant sur un lien piraté. Faites attention où vous cliquez !

Envoyez $50 de Bitcoin à cette adresse:

Video showing how to remove Lapsus$ Group ransomware using Combo Cleaner:

Lapsus$ Group ransomware removal:

Instant automatic malware removal: Manual threat removal might be a lengthy and complicated process that requires advanced IT skills. Combo Cleaner is a professional automatic malware removal tool that is recommended to get rid of malware. Download it by clicking the button below:
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Video suggesting what steps should be taken in case of a ransomware infection:

Quick menu:

Reporting ransomware to authorities:

If you are a victim of a ransomware attack we recommend reporting this incident to authorities. By providing information to law enforcement agencies you will help track cybercrime and potentially assist in the prosecution of the attackers. Here's a list of authorities where you should report a ransomware attack. For the complete list of local cybersecurity centers and information on why you should report ransomware attacks, read this article.

List of local authorities where ransomware attacks should be reported (choose one depending on your residence address):

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 ransomware that is not supported by ID Ransomware, you can always try searching the internet by using certain keywords (for example, a ransom message title, file extension, provided contact emails, crypto wallet 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, cybercriminals 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 the Recuva tool developed by CCleaner. 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). In addition, the recovery feature is completely free.

Step 1: Perform a scan.

Run the Recuva application and follow the wizard. You will be prompted with several windows allowing you to choose what file types to look for, which locations should be scanned, etc. All you need to do is select the options you're looking for and start the scan. We advise you to enable the "Deep Scan" before starting, otherwise, the application's scanning capabilities will be restricted.

Recuva data recovery tool wizard

Wait for Recuva 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 hundred 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:

Recuva data recovery tool scan time

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:

Recuva data recovery tool recovering data

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 the necessary information on Microsoft's documentation web page.

Data backups: One of the most reliable backup methods 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 the 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, although it's a really rare occasion.

We recommend using Microsoft OneDrive for backing up your files. OneDrive lets you store your personal files and data in the cloud, sync files across computers and mobile devices, allowing you to access and edit your files from all of your Windows devices. OneDrive lets you save, share and preview files, access download history, move, delete, and rename files, as well as create new folders, and much more.

You can back up your most important folders and files on your PC (your Desktop, Documents, and Pictures folders). Some of OneDrive’s more notable features include file versioning, which keeps older versions of files for up to 30 days. OneDrive features a recycling bin in which all of your deleted files are stored for a limited time. Deleted files are not counted as part of the user’s allocation.

The service is built using HTML5 technologies and allows you to upload files up to 300 MB via drag and drop into the web browser or up to 10 GB via the OneDrive desktop application. With OneDrive, you can download entire folders as a single ZIP file with up to 10,000 files, although it can’t exceed 15 GB per single download.

OneDrive comes with 5 GB of free storage out of the box, with an additional 100 GB, 1 TB, and 6 TB storage options available for a subscription-based fee. You can get one of these storage plans by either purchasing additional storage separately or with Office 365 subscription.

Creating a data backup:

The backup process is the same for all file types and folders. Here’s how you can back up your files using Microsoft OneDrive

Step 1: Choose the files/folders you want to backup.

Click the OneDrive icon in the taskbar

Click the OneDrive cloud icon to open the OneDrive menu. While in this menu, you can customize your file backup settings.

Select Help & Settings and click Settings

Click Help & Settings and then select Settings from the drop-down menu.

Select the Backup tab and click Manage backup

Go to the Backup tab and click Manage backup.

Select folders to backup and click Start backup

In this menu, you can choose to backup the Desktop and all of the files on it, and Documents and Pictures folders, again, with all of the files in them. Click Start backup.

Now, when you add a file or folder in the Desktop and Documents and Pictures folders, they will be automatically backed up on OneDrive.

To add folders and files, not in the locations shown above, you have to add them manually.

Select a file manually and copy it

Open File Explorer and navigate to the location of the folder/file you want to backup. Select the item, right-click it, and click Copy.

Paste the copied file in the OneDrive folder to create a backup

Then, navigate to OneDrive, right-click anywhere in the window and click Paste. Alternatively, you can just drag and drop a file into OneDrive. OneDrive will automatically create a backup of the folder/file.

File statuses in OneDrive folder

All of the files added to the OneDrive folder are backed up in the cloud automatically. The green circle with the checkmark in it indicates that the file is available both locally and on OneDrive and that the file version is the same on both. The blue cloud icon indicates that the file has not been synced and is available only on OneDrive. The sync icon indicates that the file is currently syncing.

Click Help & Settings and click View Online

To access files only located on OneDrive online, go to the Help & Settings drop-down menu and select View online.

Click the Settings cog and click Options

Step 2: Restore corrupted files.

OneDrive makes sure that the files stay in sync, so the version of the file on the computer is the same version on the cloud. However, if ransomware has encrypted your files, you can take advantage of OneDrive’s Version history feature that will allow you to restore the file versions prior to encryption.

Microsoft 365 has a ransomware detection feature that notifies you when your OneDrive files have been attacked and guide you through the process of restoring your files. It must be noted, however, that if you don’t have a paid Microsoft 365 subscription, you only get one detection and file recovery for free.

If your OneDrive files get deleted, corrupted, or infected by malware, you can restore your entire OneDrive to a previous state. Here’s how you can restore your entire OneDrive:


1. If you're signed in with a personal account, click the Settings cog at the top of the page. Then, click Options and select Restore your OneDrive.

If you're signed in with a work or school account,  click the Settings cog at the top of the page. Then, click Restore your OneDrive.

2. On the Restore your OneDrive page, select a date from the drop-down list. Note that if you're restoring your files after automatic ransomware detection, a restore date will be selected for you.

3. After configuring all of the file restoration options, click Restore to undo all the activities you selected.

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

Frequently Asked Questions (FAQ)

How was my computer hacked and how did hackers encrypt my files?

Victims themselves often open ransomware executables, as these files are usually disguised as regular content. This and other types of malware are primarily spread via drive-by downloads, online scams, malvertising, spam emails and messages, untrustworthy download sources (e.g., freeware and third-party websites, P2P sharing networks, etc.), illegal program activation tools ("cracks"), and fake updates.

How to open ".locked" files?

Continued file usage necessitates decryption. In other words, encrypted files cannot be opened/used unless they are decrypted.

Where should I look for free decryption tools for Lapsus$ Group ransomware?

If you have experienced a ransomware infection, we recommend checking out the No More Ransom project website (more information above).

I can pay you a lot of money, can you decrypt files for me?

We do not offer decryption services. In fact, aside from cases involving seriously flawed ransomware, recovering encrypted data is usually impossible without the attackers' interference. Therefore, third-parties offering paid decryption are often scams or aim to act as middlemen between victims and criminals.

Will Combo Cleaner help me remove Lapsus$ Group ransomware?

Yes, Combo Cleaner will scan your computer and eliminate detected ransomware infections. It must be mentioned that while using anti-virus software is the first step in ransomware recovery – security programs are incapable of decrypting files.

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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.

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Malware activity

Global malware activity level today:

Medium threat activity

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

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