Vusad Ransomware
Ransomware | 07/30/2019

How to remove malicious Vusad Ransomware from your system

About: Vusad Ransomware is another member of Djvu Ransomware family that is posing threat to the computer users world-wide. It encrypts the files & appends the file names with .Vusad extension. Learn how to uninstall Vusad file virus from your syst...  Read More  

| Ransomware | How to remove malicious Vusad Ransomware from your system

Guide to Remove Vusad Ransomware

Another strain of Djvu Ransomware family, Vusad Ransomware has been recently detected by the cyber-security analysts. The Ransomware has been named Vusad as it renames the files by appending .vusad extension to the filenames after encryption.

The hackers behind the infamous Djvu Ransomware are introducing new variants every now & then will the sole motive of generating colossal illicit revenue.

Threat Summary - Vusad

Alike its siblings, Vusad is spreading its infection via spam e-mail attachments, untrustworthy software download sources, malware-laden luring coupons & links.

Once the system is infected, it searches for the targeted user & system files. When found, it encrypts the files & demands a handsome ransom amount in exchange of the unique key. Please note that this unique key is required to restore the encrypted data.

So, does paying the ransom to the hackers helps in getting the data back? What are the other ways to restoring the encrypted data? How can one completely remove Vusad Ransomware from the system? Continue to read to find answers to such questions-

Threat Summary of Vusad Ransomware

Name Vusad
Type Ransomware
Category Malware
Operating System Impacted Windows
Symptoms Files are encrypted with .vasud extension & appearance of ransom-demanding note while trying to open the files.

 

Threat Behavior of Vusad Ransomware

The attack of Vusad Ransomware begins with encrypting user & system files on the infected system. These files may include audio files, video files, image files & documents containing sensitive information of the user.

The files are encrypted with high-complex cryptographies such as RAS (Rivest–Shamir–Adleman) & AES (Advanced Encryption Standard). These encryption algorithms are used to generate a unique private key for every infected system. The private keys are stored on the hacker’s server.

Files once encrypted are appended with a malicious .Vusad extension. This extension makes the files unreadable & inaccessible to the victim.

Targeted Files - Vusad

A file named “presentation.ppt” might be renamed as “presentation.ppt.vusad” after encryption.

Certain file extensions that .Vusad file virus is capable of encrypting are 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)

Details of the Ransom Note & Amount for Vusad Crypto Virus

After the successful encryption of the targeted files, Vusad Ransomware drops a ransom-demanding note in every folder that contains .Vusad files. This note is in a text format & named “_readme.txt”.

The ransom-note appears every time a victim tries to access the encrypted files.

It explains the victims about the current situation of the system & instructions for the victims to get their data restored.

It states that paying ransom is the only way to restore the encrypted data. The decryption requires Vusad decryption tool & a private key, which is stored on the hacker’s server.

Ransom Note - Vusad

In order to obtain that, victims are required to pay a hefty ransom amount of $980 in Bitcoins to the hackers. The victims may write to the hackers on their e-mail ids- gorentos@bitmessage.ch & varasto@firemail.cc.

The ransom-message further promises 50% discount on the ransom amount (i.e., $480 in bitcoins) to every victim that contacts hackers within 72 hours of the Vusad Encryption.

Fake Claims of Decryption by the Hackers

In order to take the victims into thinking that decryption is possible, the hackers offer to decrypt one .Vusad file free of cost. The victims are required to send any one file to the hackers on their e-mail id. The file sent for decryption must not contain any sensitive/important information.

After decryption, the file will be sent back to the victim as a guarantee of decryption.

Impacted users often tend to contact the hackers as they fear losing the data. However, contacting the hackers & paying the ransom doesn’t always yield positive results.

The analysis shows that victims often stop receiving response from the hackers after the payment has been made.

Therefore, the impacted users must act smart & do not let hackers extort their hard-earned money.

They may download Vusad Ransomware removal tool or follow guidelines mentioned below to delete Vusad virus from their system.

Distribution Techniques of Vusad Ransomware

The Djvu Ransomware family ranks amongst the most wide-spread malware, reason being, it uses multiple distribution channels to spread its infection. It helps them increase the number of victims & possibility of generating huge money for themselves.

One of the most prevalent spread methods of Vusad crypto virus is Spam e-mail campaigns.

Spread Techniques - Vusad

The e-mails sent by the hackers inform users about an undelivered package from legitimate shipping services such as FedEx or DHL. When users, out of curiosity, click on the infected attachments, links & files of the e-mail, Vusad Ransomware is installed on their system.

Other spread methods employed by hackers for the Vusad infection are:

  • Zipped Java Script Attachments
  • Peer-to-Peer Network Sharing
  • Unreliable software download sources
  • Online Advertising/infected discount coupons/links
  • Malware-laden torrent sites, adult content sites
  • Fake Software Cracks & Updaters

 

How to remove Vusad Ransomware infection from the system

STEP A: Reboot your system to Safe Mode

To restart the system to Safe Mode with Networking,  if already switched ON then follow the below steps:

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: Delete the suspicious key from the 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 Vusad 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 Vusad 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 Vusad Ransomware mentioned and click on it.
  4. Then click on Disable button.

STEP C: Remove Malicious Program from Command Prompt

Once the system starts, ensure to use an account with administrative privilege to access Safe Mode with Command Prompt.

After the user enters admin credentials, Command prompt window is displayed wherein you are entitled to enter the below commands:

  1. Type the command “sc delete Vusad Ransomware” in the command prompt and press Enter.
  2. Type “exit” to exit the command prompt and restart the system in safe mode with command prompt.

 

STEP D: Restore the System Files & 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 Vusad 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 Vusad 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 Vusad 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 Vusad 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.

How to prevent Vusad 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 VipreKaspersky BULL GUARD  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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