National Security Bureau Ransomware
Ransomware | 07/24/2018

How to Remove NATIONAL SECURITY BUREAU (NSB) Ransomware?

About: National Security Bureau is a crypt-o-virus that encrypts important user files and appends the file name with '.exe' extension rendering files inoperable for the users. The victim is informed about the encryption via a ransom note that demands '0.661...  Read More  

| Ransomware | How to Remove NATIONAL SECURITY BUREAU (NSB) Ransomware?

Guide  to Remove National Security Bureau Ransomware?


National Security Bureau is a ransomware that also features screen lock function. This feature of locking the computer screen is found in VIRLOCK variants of ransomware families. The crypt-o-virus once inside the PC encrypts system files and appends the file name with .exe extension without changing the original file name. The new files will be regarded as PEs – portable executables. This renders the files inoperable. The victim is informed about the encryption via a ransom note displayed on the locked window screen.

The note demands “0.661 BTC” ($250) ransom from the victim to allegedly restore the infected files. The subsequent pages of the note educate victim about BitCoin and ways to obtain it.

National Security Bureau Ransomware

Users however are advised not to panic and should not agree to pay the ransom under any circumstances as once the ransom is paid victims are ignored. Also agreeing to the terms and conditions of cyber miscreants encourages them to commit other cyber-criminal activities again in the future.

The files targeted by cyber criminals include:

  • Document files
  • Back up files
  • Audio files
  • Video files
  • Image files

Threats posed by National Security Bureau Ransomware

  1. National Security Bureau ransomware invades system registry to achieve persistence installation and launch the crypt-o-virus automatically with each boot of the system OS.
  2. The crypt-o-virus removes all the Shadow volume copies of computer programs as well as important user files. This is done to refrain users from restoring files from system backup.

NATIONAL SECURITY BUREAU Ransomware – Spread Techniques:

Cyber criminals use various online distribution techniques to spread National Security Bureau Ransomware in the system. The infectious payload is dropped inside a file that is password protected.

This file is then distributed via freeware programs that may appear useful to the users, however its download and installation executes a malicious script that infects the system.

The infectious payload may also be distributed via spam email attachments. Downloading the attachments without going through the email specs may make your system vulnerable to this crypt-o-virus.

Browsing suspicious site and clicking on malevolent links, fake update pop-ups are other distribution techniques to spread National Security Bureau ransomware.

Alternatives for data recovery for the victims of National Security Bureau Ransomware :

  1. Maintaining a regular data backup on unplugged storage devices like USB stick, external Hard Disks or on remote servers as well as virtual cloud services is always recommended to be on a safer side.
  2. Third-party software might help you with file decryption.
  3. Rely on an independent security researcher to crack malware code and create a decryption key.

Threat Summary


Targeted Operating System: Windows

Category: Ransomware

Symptoms: User’s files are encrypted. Names of all the locked files are appended with “.exe” extension after the encryption and hence cannot be accessed by the user.

How to get rid of National Security Bureau  Ransomware?



Tips to prevent your computer system from getting infected –

  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 Avira and Kaspersky Labs Inc 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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