StupidJapan Virus – How to Remove It

StupidJapan Virus – How to Remove It


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This article will aid you to remove StupidJapan Virus. Follow the ransomware removal instructions provided at the end of the article.

StupidJapan Virus is one that encrypts your data and demands money as a ransom to get it restored. The StupidJapan Virus will leave ransomware instructions as a lockscreen instance thereby making it impossible to interact with the computer in an ordinary way. Keep on reading the article and see how you could try to potentially recover some of your locked files and data.

Threat Summary

TypeRansomware, Cryptovirus
Short DescriptionThe ransomware will demands a ransom sum to be paid to allegedly recover the computer.
SymptomsThe ransomware will install a lockscreen window payment instructions.
Distribution MethodSpam Emails, Email Attachments
Detection Tool See If Your System Has Been Affected by StupidJapan


Malware Removal Tool

User ExperienceJoin Our Forum to Discuss StupidJapan.
Data Recovery ToolWindows Data Recovery by Stellar Phoenix Notice! This product scans your drive sectors to recover lost files and it may not recover 100% of the encrypted files, but only few of them, depending on the situation and whether or not you have reformatted your drive.

StupidJapan Virus – Distribution Techniques

We have received security reports of a dangerous new infection carrying the StupidJapan virus. The collected releases of this ransomware have been identified in an ongoing attack campaign. So far the number of collected samples are low in number which does not give out which is the main method of distribution. We anticipate that once the attacks are launched at a larger scale the infections will utilize several of the most popular techniques.

Many ransomware threats like the StupidJapan virus are spread via email SPAM messages which utilize various social engineering techniques. They are created in a way which impersonates popular services or companies. The infected files can be either linked or attached directly to the messages.

Another similar tactic relies on the creation of web sites that impersonate download portals or vendor pages. These two techniques are also used to spread infected payloads of which there are two main types:

  • Infected Documents — The hackers can craft documents of all popular types: presentations, spreadsheets, text documents and databases. When they are opened by users will be asked to enable the built-in scripts. This will lead to the virus infection.
  • Application Installers — The other popular infection method is the inclusion of the virus code in application installers across all popular software that is downloaded by end users: productivity, office tools, creativity suites and system utilities.

Large-scale infection campaigns can be caused by the use of browser hijackers which are dangerous extensions made for the most popular web browsers. They are frequently uploaded to their relevant plugin repositories with fake user reviews and developer credentials. The descriptions offered often promise feature additions and performance optimizations. As soon as they are installed the hijacker will deliver the ransomware code along with the execution of other commands as configured by the hackers.

All virus-related files can also be spread via file-sharing networks like BitTorrent. They are used to share both legitimate content and pirate versions of both software and multimedia files.

StupidJapan Virus – Detailed Analysis

The StupidJapan virus does not appear to originate from any of the known malware families. This probably means that the hackers have made it by themselves or have commissioned it through an order made in the hacker underground markets.

The ransomware seems to target mainly English-speaking users, the limited number of launched attacks suggest that the captured samples are merely early versions or a test release. We anticipate that future updates to its code will add many more additions to its code base. At the moment only the encryption module is present.

Further updates will probably incorporate a traditional infection pattern. Once the virus code has infiltrated the machine it will launch a data harvesting component. Using its built-in engine it can scan and extract contents from the hard drive, operating system and memory that is grouped into two main categories:

  • Private Information — The engine will hijack data that can directly expose the identity of the users: their name, address, phone number and any stored account credentials. This includes all popular forms such as username, password, email address and secret question & answer combination.
  • Machine ID Information — The collected data can also include such as operating system conditions, hardware components information and other user regional settings. They are fed through a special algorithms that computes an unique machine ID which is assigned to every different machine.

This information can be sent to the hackers using a network connection or used by another component called security bypass — it will scan for the presence of security software and services that can block the virus activity. The list may include most popular anti-virus products, firewalls and debug environments.

When these two modules have finished running the infection engine will be able to access the whole system. This allows them to carry out various changes such as the following:

  • Persistent Installation — The StupidJapan virus can be installed in a persistent way which will automatically start the ransomware as soon as the computer is launched. Modifications to the boot settings and system configuration will make it very hard to remove using manual methods. This option can also disable the boot recovery menu.
  • Windows Registry Changes — Modifications to existing values inside the Windows Registry can lead to problems both to the operating system, its services and any third-party installed applications. This can disable certain functions or altogether make it impossible to start them. Other consequences include serious system stability issues.
  • Trojan Horse Infection — If a Trojan virus infection is configured as an additional payload delivery the client will establish a secure connection to a hacker-controlled server. It will allow the hacker operators to spy on the users, steal their files and take over control of the machines at any given time.
  • Additional Payload Delivery — Other threats can be delivered to the infected machines include all popular forms of malware.

Some of the dangerous consequences of having such ransomware installed is their ability to delete system data which makes recovery much more difficult. Possible consequences include the deletion of System Backups and Shadow Volume Copies. In such cases the use of a professional-grade backup and recovery software must be used, refer to our instructions for more information.

Ransomware infections of this type can lead to the installation of malware such as cryptocurrency miners which will take advantage of the available system resources in order to download and execute resources-intensive tasks. Once the completed ones are reported to their relevant servers the hacker operators will receive digital currency directly into their wallets.

The other major threat that is combined often with ransomware is the delivery of browser hijackers. They represent malicious plugins made for the most popular web browsers which will trigger redirects to hacker-controlled sites, hijack data and change the browser settings.

Further updates may bring other changes to the infected computers.

StupidJapan Virus – Encryption Process

When all preliminary components have finished executing the encryption engine will be started. As these are test releases their ransomware component was switched off. The future versions will probably use a built-in list of target file type extensions. An example one is the following:

  • Archives
  • Backups
  • Documents
  • Music
  • Videos
  • Photos

When the encryption has completed a lockscreen instance will be shown to the victims. This replaces the traditional ransomware note technique by “locking out” the users. As long as the StupidJapan virus is installed on the victim machines it will show an application frame that reads the following message:

Are You Stupid Japan?
Let’s have yours.
The facts are being heard.
Do not regret it later and apologize quickly!
What to do.
Your personality will be known to the world as garbage.
I apologize to the Republic of Korea officially sorry!

Remove StupidJapan Virus and Try to Restore Data

If your computer system got infected with the StupidJapan ransomware virus, you should have a bit of experience in removing malware. You should get rid of this ransomware as quickly as possible before it can have the chance to spread further and infect other computers. You should remove the ransomware and follow the step-by-step instructions guide provided below.

Note! Your computer system may be affected by StupidJapan and other threats.
Scan Your PC with SpyHunter
SpyHunter is a powerful malware removal tool designed to help users with in-depth system security analysis, detection and removal of threats such as StupidJapan.
Keep in mind, that SpyHunter’s scanner is only for malware detection. If SpyHunter detects malware on your PC, you will need to purchase SpyHunter’s malware removal tool to remove the malware threats. Read our SpyHunter 5 review. Click on the corresponding links to check SpyHunter’s EULA, Privacy Policy and Threat Assessment Criteria.

To remove StupidJapan follow these steps:

1. Boot Your PC In Safe Mode to isolate and remove StupidJapan files and objects
2. Find files created by StupidJapan on your PC

Before starting the Automatic Removal below, please boot back into Normal mode, in case you are currently in Safe Mode.
This will enable you to install and use SpyHunter 5 successfully.

Use SpyHunter to scan for malware and unwanted programs

3. Scan for malware and unwanted programs with SpyHunter Anti-Malware Tool
4. Try to Restore files encrypted by StupidJapan

Martin Beltov

Martin graduated with a degree in Publishing from Sofia University. As a cyber security enthusiast he enjoys writing about the latest threats and mechanisms of intrusion.

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