LanRan Ransomware

Also Known As: LanRan virus
Distribution: Low
Damage level: Severe

LanRan ransomware removal instructions

What is LanRan?

LanRan is a ransomware-type virus based on an open-source ransomware project called Hidden Tear. It is designed to infiltrate the system and encrypt most stored files (thereby making them unusable) using the AES encryption algorithm. In addition, LanRan adds the ".LanRan2.0.5" appendix to the name of each compromised file (e.g., "sample.jpg" is renamed to "sample.jpg.LanRan2.0.5"). After LanRan finishes encrypting data, it changes the desktop wallpaper and creates a text file ("@___README___@.txt"), placing a copy in every existing folder.

The desktop wallpaper and text file contain identical messages stating that data is compromised and that victims must purchase a decryption tool (together with keys) to restore it. As mentioned above, LanRan uses AES - a symmetric encryption algorithm that uses a single key (generated individually for each victim) to encrypt and decrypt data. Restoring files without this key is impossible. Therefore, cyber criminals (LanRan's developers) encourage each victim to pay a ransom of .5 Bitcoin (currently equivalent to approximately $3700) in exchange for release of the key. Research shows, however, that once encryption is complete, the keys are permanently deleted (cyber criminals do not store them anywhere). Therefore, paying will not deliver any positive result and you will simply be scammed. In addition, you will support cyber criminals' malicious businesses. You are strongly advised to ignore all requests to submit payments or contact these people. Unfortunately, there are currently no tools capable of cracking LanRan's encryption and restoring data free of charge. The only solution is to restore everything from a backup.

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

LanRan decrypt instructions

LanRan is virtually identical to SHRUG, Deep, Jewsomware, Evil Locker, and dozens of other ransomware-type viruses. Note that all of these viruses have identical behavior (they encrypt data and demand payments), even though they have different developers. In most cases, there are just two major differences: 1) size of ransom, and; 2) type of encryption algorithm used. Unfortunately, most employ cryptographies (such as RSA, AES, and similar) that generate unique decryption keys. Therefore, it is mostly impossible to restore data without involvement of developers (contacting these people is not recommended). The only possible scenarios are the ransomware not being fully developed or having certain bugs/flaws (the key is hard-coded, stored locally or similar). Therefore, it is very important to maintain regular data backups, however, store them on a remote server (e.g., Cloud) or unplugged storage device (Flash drive, external hard drive). This will prevent ransomware from encrypting backups together with regular files.

How did ransomware infect my computer?

Ransomware is distributed in various ways, however, the most popular five are: 1) fake software updaters; 2) third party software download sources (free file hosting websites, freeware download websites); 3) peer-to-peer [P2P] networks [eMule, torrents, and so on]; 4) trojans, and; 5) spam emails. Fake updaters infect the system by exploiting old software bugs/flaws or simply downloading and installing malware rather than updates. Unofficial download sources and P2P networks deliver malicious executables as legitimate software, thereby tricking unsuspecting users into downloading and installing malware. Trojans open "backdoors" for other viruses to infiltrate the system. Spam emails include malicious attachments (e.g., MS Office documents, JavaScript files or similar) that, once opened, download and install viruses.

Threat Summary:
NameLanRan virus
Threat TypeRansomware, Crypto Virus, Files locker
SymptomsCan't open files stored on your computer, previously functional files now have a different extension, for example my.docx.locked. A ransom demanding message is displayed on your desktop. Cyber criminals are asking to pay a ransom (usually in bitcoins) to unlock your files.
Distribution methodsInfected email attachments (macros), torrent websites, malicious ads.
DamageAll 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.
Removal

To eliminate LanRan virus our malware researchers recommend scanning your computer with Spyhunter.
▼ Download Spyhunter
Free scanner checks if your computer is infected. To remove malware, you have to purchase the full version of Spyhunter.

How to protect yourself from ransomware infections?

Lack of knowledge and careless behavior are the main reasons for system infections. The key to safety is caution. Therefore, pay close attention when browsing the Internet, downloading/installing/updating software, and browsing the Internet. Keep installed applications up-to-date. Bear in mind, however, that this should be achieved using official updaters or implemented functions only. In addition, it is important to download your programs from official sources only, using direct download links. Third party downloaders/installers are often used to proliferate rogue programs, and thus you are advised not to use them. Think twice before opening email attachments. Files that seem irrelevant or have been received from a suspicious email address should never be opened. It is essential to have a reputable anti-virus/anti-spyware suite installed and running. If your computer is already infected with LanRan, we recommend running a scan with Spyhunter for Windows to automatically eliminate this ransomware.

Screenshot of LanRan desktop wallpaper:

LanRan wallpaper

Text presented in LanRan ransomware desktop wallpaper and text file ("@___README___@.txt"):

L_A_N_R_A_N R_A_N_S_O_M_W_A_R_E
Attention! Attention! Attention! Your Files has been encrypted By L_A_N_R_A_NـــــR_A_N_S_O_M_W_A_R_E
What is encryption?
Encryption is a reversible modification of information for security reasons but providing full access to it for authorized users. To become an authorized user and keep the modification absolutely reversible (in other words to have a possibility to decrypt your files) you should have an individual private key.
But not only it
It is required also to have the special decryption software (in your L_A_N_R_A_N Decryptor software) for safe and complete decryption of all your files and data.
Send 0.5 Bitcoin To @ 1sUCn6JYa7B96t4nZz1tX5muU2W5YxCmS @
for decrypt your files Contact us By Email : lanran-decrypter@list.ru If Send 0.5 Bitcoin We will send you the decryption key LanRan Decryptor
It's Your Choice

Screenshot of files encrypted by LanRan (".LanRan2.0.5" extension):

Files encrypted by LanRan

LanRan ransomware removal:

Instant automatic removal of LanRan virus: Manual threat removal might be a lengthy and complicated process that requires advanced computer skills. Spyhunter is a professional automatic malware removal tool that is recommended to get rid of LanRan virus. Download it by clicking the button below:
▼ DOWNLOAD Spyhunter By downloading any software listed on this website you agree to our Privacy Policy and Terms of Use. Free scanner checks if your computer is infected. To remove malware, you have to purchase the full version of Spyhunter.

Quick menu:

Step 1

Windows XP and Windows 7 users: Start your computer in Safe Mode. Click Start, click Shut Down, click Restart, click OK. During your computer start process, press the F8 key on your keyboard multiple times until you see the Windows Advanced Option menu, and then select Safe Mode with Networking from the list.

Safe Mode with Networking

Video showing how to start Windows 7 in "Safe Mode with Networking":

Windows 8 users: Start Windows 8 is Safe Mode with Networking - Go to Windows 8 Start Screen, type Advanced, in the search results select Settings. Click Advanced startup options, in the opened "General PC Settings" window, select Advanced startup. Click the "Restart now" button. Your computer will now restart into the "Advanced Startup options menu". Click the "Troubleshoot" button, and then click the "Advanced options" button. In the advanced option screen, click "Startup settings". Click the "Restart" button. Your PC will restart into the Startup Settings screen. Press F5 to boot in Safe Mode with Networking.

Windows 8 Safe Mode with networking

Video showing how to start Windows 8 in "Safe Mode with Networking":

Windows 10 users: Click the Windows logo and select the Power icon. In the opened menu click "Restart" while holding "Shift" button on your keyboard. In the "choose an option" window click on the "Troubleshoot", next select "Advanced options". In the advanced options menu select "Startup Settings" and click on the "Restart" button. In the following window you should click the "F5" button on your keyboard. This will restart your operating system in safe mode with networking.

windows 10 safe mode with networking

Video showing how to start Windows 10 in "Safe Mode with Networking":

Step 2

Log in to the account infected with the LanRan virus. Start your Internet browser and download a legitimate anti-spyware program. Update the anti-spyware software and start a full system scan. Remove all entries detected.

If you cannot start your computer in Safe Mode with Networking, try performing a System Restore.

Video showing how to remove ransomware virus using "Safe Mode with Command Prompt" and "System Restore":

1. During your computer start process, press the F8 key on your keyboard multiple times until the Windows Advanced Options menu appears, and then select Safe Mode with Command Prompt from the list and press ENTER.

Boot your computer in Safe Mode with Command Prompt

2. When Command Prompt mode loads, enter the following line: cd restore and press ENTER.

system restore using command prompt type cd restore

3. Next, type this line: rstrui.exe and press ENTER.

system restore using command prompt rstrui.exe

4. In the opened window, click "Next".

restore system files and settings

5. Select one of the available Restore Points and click "Next" (this will restore your computer system to an earlier time and date, prior to the LanRan ransomware virus infiltrating your PC).

select a restore point

6. In the opened window, click "Yes".

run system restore

7. After restoring your computer to a previous date, download and scan your PC with recommended malware removal software to eliminate any remaining LanRan ransomware files.

To restore individual files encrypted by this ransomware, try using Windows Previous Versions feature. This method is only effective if the System Restore function was enabled on an infected operating system. Note that some variants of LanRan are known to remove Shadow Volume Copies of the files, so this method may not work on all computers.

To restore a file, right-click over it, go into Properties, and select the Previous Versions tab. If the relevant file has a Restore Point, select it and click the "Restore" button.

Restoring files encrypted by CryptoDefense

If you cannot start your computer in Safe Mode with Networking (or with Command Prompt), boot your computer using a rescue disk. Some variants of ransomware disable Safe Mode making its removal complicated. For this step, you require access to another computer.

To regain control of the files encrypted by LanRan, you can also try using a program called Shadow Explorer. More information on how to use this program is available here.

shadow explorer screenshot

To protect your computer from file encryption ransomware such as this, use reputable antivirus and anti-spyware programs. As an extra protection method, you can use programs called HitmanPro.Alert and EasySync CryptoMonitor, which artificially implant group policy objects into the registry to block rogue programs such as LanRan ransomware.

Note that Windows 10 Fall Creators Update includes a "Controlled Folder Access" feature that blocks ransomware attempts to encrypt your files. By default, this feature automatically protects files stored in the Documents, Pictures, Videos, Music, Favorites as well as Desktop folders.

Controll Folder Access

Windows 10 users should install this update to protect their data from ransomware attacks. Here is more information on how to get this update and add an additional protection layer from ransomware infections.

HitmanPro.Alert CryptoGuard - detects encryption of files and neutralises any attempts without need for user-intervention:

hitmanproalert ransomware prevention application

Malwarebytes Anti-Ransomware Beta uses advanced proactive technology that monitors ransomware activity and terminates it immediately - before reaching users' files:

malwarebytes anti-ransomware

  • The best way to avoid damage from ransomware infections is to maintain regular up-to-date backups. More information on online backup solutions and data recovery software Here.

Other tools known to remove LanRan ransomware: