Litar Ransomware
Ransomware | 07/02/2019

Litar Ransomware – Another Nasty Variant of STOP (DJVU) Ransomware Family

About: The newly discovered Litar Ransomware is a variant of the infamous STOP (DJVU) Ransomware Family. It encrypts user & system files by appending .litar extension to the file names. Refer to our Virus removal guide to learn how to remove litar ...  Read More  

| Ransomware | Litar Ransomware – Another Nasty Variant of STOP (DJVU) Ransomware Family

Guide To Remove Litar Ransomware

A new addition to the family of infamous STOP (DJVU) Ransomware has been spotted by the cyber-security analysts recently. It has been named as Litar Ransomware as it appends a .litar extension to the file names after encrypting them.

This newly discovered data-locking infection has impacted a large number of systems across the world so far. Some of the confirmed victims of Litar have been found in Argentina.

Ransom Note for Litar Ransomware

Upon infecting the system, Litar Ransomware employs RSA & AES cryptographies, encrypts the files & renders them inaccessible to the user.

The methods used by the hackers for the proliferation of Litar Ransomware are still not known. However it is speculated that creators may be using some common spread techniques such as spam e-mail attachments & bogus software updates.

Threat Summary

Name Litar
Type Ransomware
Category Malware
Operating System Impacted Windows
Targeted Browser Google Chrome, Internet Explorer, Mozilla Firefox

 

Threat Behavior of Litar Ransomware

Litar Ransomware is a variant of the giant STOP (DJVU) Ransomware that has been discovered recently.

According to the malware researchers, this newly discovered crypto-virus is spreading its infection at an alarming rate. Some of the confirmed victims of this devious malware have been reported in Argentina.

The chief methods of its propagation are currently unknown. However, some cyber-security researchers think that creators are employing common distribution techniques to spread Litar’s infection. These many include spam e-mail attachments, unofficial download sources & software bundling.

Once the system is infected, Litar locates the files & encrypts them by adding .litar extension to the files. Litar uses highly-complex Encryption Algorithms & Cryptography methods such as AES & RAS to encrypt the files & hence makes it difficult for the user to decrypt the data.

Example of encryption: A file named “picture.jpg” might be renamed as “picture.jpg.litar”.

The files targeted by the Litar Ransomware may include the file extensions mentioned below:

  • Document files (.docx, .doc, .odt, .rtf, .text, .pdf, .htm, .ppt)
  • Audio Files (.mp3, .aif, .iff, .m3u, .m4u, .mid, .mpa, .wma, .ra, .avi, .mov, .mp4)
  • Video Files (.3gp, .mpeg, .3g2, .asf, .asx, .flv, .mpg, .wmv, .vob)
  • Images (.jpg, .jpeg, .raw, .tif, .gif, .png)
  • Backup Files (.bck, .bckp, .tmp, .gho)

The main motive of hackers behind encrypting the files is to extort money by asking the victims to pay a ransom amount to restore their encrypted data.

The Ransom Note & Amount for Litar Ransomware

The instructions to decrypt the encrypted files are displayed on the victim’s desktop in the form of a text file named “_readme.txt”.

The ransom note appears in the form of a program window & holds the title: “Attention”.

The note conveys that the user files are encrypted with a strong encryption algorithm & unique key. The only way to get the encrypted data restored is to contact the hackers & pay the ransom amount.

Ransom Note - Litar

The Ransom Amount demanded by the hackers is $980 (in Bitcoins). Victims can get 50% discount on the ransom amount ($490), in case they contact the hackers within 72 hours of the encryption.

E-mail addresses provided by the hackers include- ferast@firemail.cc and gorentos@bitmessage.ch.

Victims can reach the hackers on their Telegram Account@datarestore.

In order to earn the trust of the victims, the hackers offer to decrypt one file for free & send it back to the user as a guarantee of decryption. However, users should note that these claims are fake. Analysis has shown that after receiving the ransom, hackers usually avoid the victims.

Since paying the ransom does not yield positive results, users are advised to avoid any encouragement to pay the ransom & contact the hackers.

Users should be cautious towards the security of their system & pay attention while browsing internet, downloading, installing & updating software.

Note: The infamous STOP Ransomware Family has been in headlines for installing a Trojan Virus named AZORult on the targeted systems. This Trojan has been specifically designed to gather various account credentials.

Distribution Techniques of Litar Ransomware

The methods employed by the cyber-criminals for the propagation of Litar Infection are currently not clear. However, some of the security researchers claim that Litar Infections are being distributed by some common spread techniques.

These may include, however, are not limited to the following methods:

1). Spam e-mail containing infected attachments

2). Exploit the vulnerabilities of the OS & installed software

3). Third-party software download sources (free file-hosting websites, freeware download websites, Peer-to-Peer Networks).

4). Fake software updaters/Cracks & shareware.

5). Software Bundling – it may download/invite a legion of Trojans, Ransomware & Virus on the system.

6). Visiting Questionable/Suspicious Torrent Websites & other Malware-Laden sites

How to Remove Litar Ransomware infection from the system

STEP A: Reboot your system using Safe Mode with Networking 

Windows 7/ Vista/ XP

  1. Click on Windows icon present in the lower left corner of the computer screen.
  2. Select and click  Restart.
  3. When the screen goes blank, Keep tapping  F8  Key until you see the Advanced Boot Options window.
  4. With the help of arrow keys on keyboard, Select Safe Mode with Networking  option from the list and press the Enter Key. The system will then restart to Safe Mode with Networking.

5 Click on the username and enter the password (if any).

Windows 10 / Windows 8

  1. Press and hold the Shift Key and simultaneously click on the windows icon present in the lower left corner of your computer screen.
  2. While the Shift key is still pressed click on the Power button and then click on Restart.
  3. Now select Troubleshoot → Advanced options → Startup Settings.
  4. When the Startup Settings screen appears which is the first screen to appear after restart, select and click on Enable Safe Mode with Networking. The system will then restart to Safe Mode with Networking.
  5. Click on the username and enter the password.

STEP B:  Restore your system files and settings

Method 1 using Control Panel

  1. Click on the ‘Start’ button on the taskbar. This will open the Start menu.
  2. Click on the ‘Control Panel’ button in the Start menu. This will open the control panel window.
  3. In the Control Panel window, click on the ‘View by:’ button on the top right. Select the Large Icon option
  4. In the control Panel window click on the ‘Recovery Icon’. This will open a window that will ask ‘Restore the computer to an earlier point in time’.
  5. Click on the ‘Open system restore’ button. This will open the ‘system restore ’window where you need to click on the Next Button.
  6.  Select the restore point that is prior the infiltration of Litar Ransomware. After doing that, click Next.
  7. This will open the ‘Confirm your restore point’ dialog box. Click on Finish button. This will restore your system to a previous restore point before your system was infected by Litar Ransomware.

OR

Method 2 using Command Prompt

  1. Type cmd in the search box and click on the command prompt to open the Command Prompt window. box and clicking on it.
  2. Once the Command Prompt window shows up, enter cd restore and click Enter.(Ensure that you in the system32 directory of Windows folder in C Drive)
  3. Now type rstrui and press Enter again.
  4. When a new window shows up, click Next and select your restore point that is prior the infiltration of Litar Ransomware.After doing that, click Next.
  5. This will open the ‘Confirm your restore point’ dialog box. Click on Finish button. This will restore your system to a previous restore point before your system was infected by Litar Ransomware. 

 

OR

Method 3 : Directly type 'rstrui' in the search box

  1. Type ‘Rstrui’ in the search box present on the task bar. This will open the System restore dialog box.

Continue to follow steps 4 & 5 of Method 2 to restore the System Files and settings.

STEP C: Check System Configuration Settings

  1. Type “Msconfig” in search box / Run Box, select it and press Enter.
  2. Click on “Services” Tab and click on “Hide all Microsoft services”.
  3. Select Litar Ransomware from the list of remaining services and disable it by removing the tick mark from the checkbox and click on Apply button.

Windows 7

  1. Click on the next tab – “Startup”.
  2. Find any blank or suspicious entry or the entry with Litar Ransomware mentioned and remove the check mark.
  3. Click on Apply button and then click on OK.

Windows 10

  1. Click on the next tab – “Startup”.
  2. Take the mouse cursor to ‘Open task Manager‘ link and click on it.  This opens the Task Manager window.
  3. Find any blank or suspicious entry or the entry with Litar Ransomware mentioned and click on it.
  4. Then click on Disable button.

How to prevent Litar Ransomware from infecting your system

  1. Keeping the Operating System Updated- In order to remain protected and avoid such infections, it is recommended to keep your Operating System updated by enabling the automatic update on your system. The systems with outdated or older versions of Operating System become an easy target for the attackers.
  2. Resist clicking on spam emails – One of the major techniques used for malware distribution is forwarding spam emails to the user. The system gets infected as soon as the user clicks on the attachment. These mails appear to be genuine, so be aware and resist falling for these tricks.
  3. Keep an eye on third party installations- It is quite important that you take due care while installing any third party applications for they are major source of such infections. Such malware programs come bundled with the free applications thereby requiring the user to remain cautious.
  4. Regular periodical backup- In order to keep your data and files safe, it is recommended to take regular back up of all your data and files either on an external drive or cloud.
  5. Use Anti-Virus Protection- We strongly recommend the use of antivirus protection/internet security in your PC like 360 Total SecurityKaspersky and Vipre  so that it remains safe.
  6. Enable the Ad Blocker/Popup Blocker in your browser- Enabling the popup blocker/ ad blocker in your chosen browser will help you to stay protected from annoying adware.

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