How to remove LanRan Ransomware and decrypt .LanRan2.0.5 files

What is LanRan Ransomware

LanRan Ransomware is a type of malicious software designed to encrypt files on an infected computer, rendering them inaccessible to the user until a ransom is paid. This ransomware was first discovered in 2017 and has since evolved into various versions. It is part of a broader category of ransomware that targets both individual users and organizations, demanding payment in exchange for the decryption key needed to restore access to the encrypted files. LanRan Ransomware appends specific extensions to the encrypted files, making it easy to identify affected files. For instance, it adds the extension .LanRan2.0.5 to the filenames. This alteration not only signals that the files have been encrypted but also prevents the user from opening them with their usual applications. LanRan Ransomware employs strong encryption algorithms to secure the files it targets. Typically, it uses a combination of AES (Advanced Encryption Standard) for file encryption and RSA (Rivest-Shamir-Adleman) for encrypting the AES key. This dual-layer encryption ensures that decrypting the files without the corresponding decryption key is virtually impossible. Upon completing the encryption process, LanRan Ransomware generates a ransom note to inform the victim of the attack and provide instructions for payment. The ransom note is usually placed in prominent locations such as the desktop or the root directories of affected drives. It may be named something like @___README___@.txt or similar, depending on the variant. The note typically includes instructions on how to pay the ransom, often in Bitcoin, contact information for the attackers, such as an email address (e.g., lanran-decrypter@list.ru) and a warning that attempting to decrypt the files without paying the ransom could result in permanent data loss.

Fortunately, there are decryption tools available for some variants of LanRan Ransomware. For instance, the HT Brute Forcer and HT Decryptor tool can decrypt files encrypted by certain versions of LanRan, as it supports multiple HiddenTear variants, including LanRan. This tool can be used to recover files without paying the ransom, provided the specific variant of LanRan is supported. We provide detailed instructions below.

How LanRan Ransomware infects computers

LanRan Ransomware typically spreads through several common vectors:

Email Attachments: Malicious email attachments, often disguised as legitimate documents, are a primary method of distribution. These attachments may contain macros or scripts that execute the ransomware upon opening.
Malicious Links: Links in phishing emails or on compromised websites can lead to the download and execution of the ransomware.
Exploit Kits: These kits exploit vulnerabilities in outdated software to deliver the ransomware payload.
Peer-to-Peer Networks: Files shared on P2P networks may be infected with the ransomware.

Once executed, LanRan Ransomware begins the encryption process, targeting a wide range of file types and making them inaccessible to the user.

1. Download LanRan Ransomware Removal Tool
2. Get decryption tool for .LanRan2.0.5 files
3. Recover encrypted files with Stellar Data Recovery Professional
4. Restore encrypted files with Windows Previous Versions
5. Restore files with Shadow Explorer
6. How to protect from threats like LanRan Ransomware

LanRan Ransomware files:


@___README___@.txt
{randomname}.exe


LanRan Ransomware registry keys:

no information

How to decrypt and restore .LanRan2.0.5 files

Use automated decryptors

Download HT Bruteforcer and HT Decryptor

Use the following tools from Michael Gillespie called HT Bruteforcer and HT Decryptor, that can decrypt .LanRan2.0.5 files. Download it here:

Download HT Bruteforcer Download HT Decryptor

1. Visit the download page for HT Brute Forcer and download the hidden-tear-bruteforcer.zip file.
2. Extract the contents of the downloaded ZIP file.
3. Locate and execute the HiddenTear Bruteforcer.exe file.
4. Click on the Browse Sample button.
5. Choose an encrypted PNG file from your system. It is recommended to select a smaller file for faster processing.
6. Click on the Start Bruteforce button to begin the brute-forcing process. This process may take some time depending on the complexity of the encryption.
7. Once the tool finds the encryption key, it will automatically attempt to decrypt the test file.
8. Verify if the test file was decrypted correctly. If it was, save the discovered key.
9. Download the standalone HiddenTear Decryptor tool.
10. Double-click on the hidden-tear-decrypter.exe file to launch the decryptor.
11. Enter the decryption key discovered by the brute forcer.
12. Click on the Decrypt My Files button to start the decryption process.
13. Once the decryption process is complete, the tool will display a screen indicating the number of files that were successfully decrypted.

There is no purpose to pay the ransom because there is no guarantee you will receive the key, but you will put your bank credentials at risk.

Dr.Web Rescue Pack

Famous antivirus vendor Dr. Web provides free decryption service for the owners of its products: Dr.Web Security Space or Dr.Web Enterprise Security Suite. Other users can ask for help in the decryption of .LanRan2.0.5 files by uploading samples to Dr. Web Ransomware Decryption Service. Analyzing files will be performed free of charge and if files are decryptable, all you need to do is purchase a 2-year license of Dr.Web Security Space worth $120 or less. Otherwise, you don’t have to pay.

If you are infected with LanRan Ransomware and removed from your computer, you can try to decrypt your files. Antivirus vendors and individuals create free decryptors for some crypto-lockers. To attempt to decrypt them manually, you can do the following:

Use Stellar Data Recovery Professional to restore .LanRan2.0.5 files

1. Download Stellar Data Recovery Professional.
2. Click Recover Data button.
3. Select the type of files you want to restore and click Next button.
4. Choose the location where you would like to restore files from and click Scan button.
5. Preview found files, choose ones you will restore and click Recover.

Download Stellar Data Recovery Professional

Using Windows Previous Versions option:

1. Right-click on infected file and choose Properties.
2. Select Previous Versions tab.
3. Choose a particular version of the file and click Copy.
4. To restore the selected file and replace the existing one, click on the Restore button.
5. In case there are no items in the list, choose an alternative method.

Using Shadow Explorer:

1. Download Shadow Explorer program.
2. Run it, and you will see a screen listing of all the drives and the dates that shadow copy was created.
3. Select the drive and date that you want to restore from.
4. Right-click on a folder name and select Export.
5. In case there are no other dates in the list, choose an alternative method.

If you are using Dropbox:

1. Login to the Dropbox website and go to the folder that contains encrypted files.
2. Right-click on the encrypted file and select Previous Versions.
3. Select the version of the file you wish to restore and click on the Restore button.

How to protect computer from viruses, like LanRan Ransomware, in future

1. Get special anti-ransomware software

Use ZoneAlarm Anti-Ransomware

Famous antivirus brand ZoneAlarm by Check Point released a comprehensive tool, that will help you with active anti-ransomware protection, as an additional shield to your current protection. The tool provides Zero-Day protection against ransomware and allows you to recover files. ZoneAlarm Anti-Ransomware is compatible with all other antiviruses, firewalls, and security software except ZoneAlarm Extreme (already shipped with ZoneAlarm Anti-Ransomware) or Check Point Endpoint products. The killer features of this application are: automatic file recovery, overwrite protection that instantly and automatically recovers any encrypted files, file protection that detects and blocks even unknown encryptors.

Download ZoneAlarm Anti-Ransomware

2. Back up your files

As an additional way to save your files, we recommend online backup. Local storage, such as hard drives, SSDs, flash drives, or remote network storage can be instantly infected by the virus once plugged in or connected to. LanRan Ransomware uses some techniques to exploit this. One of the best services and programs for easy automatic online backup is iDrive. It has the most profitable terms and a simple interface. You can read more about iDrive cloud backup and storage here.

3. Do not open spam e-mails and protect your mailbox

Malicious attachments to spam or phishing e-mails are the most popular method of ransomware distribution. Using spam filters and creating anti-spam rules is good practice. One of the world leaders in anti-spam protection is MailWasher Pro. It works with various desktop applications and provides a very high level of anti-spam protection.

Download MailWasher Pro