Mr403Forbidden Ransomware Removal Guide

Do you know what Mr403Forbidden Ransomware?

According to our cyber security experts, Mr403Forbidden Ransomware is a highly dangerous computer infection that was designed to encrypt your files. However, the good news is that it does not do that, at least it did not at the time of our analysis. It was first spotted in July 2017 but did not encrypt files since the beginning. If your PC were to become infected with it, then it would only show you a ransom note, and nothing else would happen. This ransomware can get onto your PC via stealth, and you should remove it if that happens.

Our malware analysts say that Mr403Forbidden Ransomware is probably distributed using the tried and tested methods of email spam and security exploits. They say that this ransomware can be included in bogus emails that may appear legitimate as they can masquerade as tax return forms or business-related correspondence. This ransomware is probably attached to the email, but the email could also have a link to the malicious file. If the ransomware file is attached to the email directly, then it is probably disguised as a PDF file, but look at the last extension which will say that it is an EXE file. If you open the attached file, then it will be dropped in the %TEMP% folder. However, if you download it first, then it will be placed where all of your browser’s downloads go.

If your PC were to become infected with Mr403Forbidden Ransomware, then nothing damaging will happen. Researchers say that this program’s Control and Command (C&C) server is down, so it does not receive instructions to start encrypting. Furthermore, a C&C server is required to store the decryption key that is sent to you via email once you have paid. Researchers say that, if this program worked, then it would add an “.alosia” file extension to all encrypted files. “Alosia is also the name of the group that created this ransomware. Mr403Forbidden Ransomware opens a dialog window written in broken English which indicates that this ransomware was created by non-native speakers. The text “Anda Terkunci” is in the Indonesian language that means “You are Locked.” Extensive testing has shown that that is all Mr403Forbidden Ransomware can do. It does not lock the PC or drop additional files.Mr403Forbidden Ransomware Removal GuideMr403Forbidden Ransomware screenshot
Scroll down for full removal instructions

While it does not encrypt your files, this ransomware’s ransom note wants you to pay an unspecified sum of money for a decryption key. The note says that you have to contact the developers by messaging them or However, we want to point out that you may never receive the promised key because Mr403Forbidden Ransomware does not generate it because the C&C is down. Therefore, paying the ransom is useless.

In closing, this ransomware could have been one highly dangerous computer infection but, luckily, it is unable to encrypt anything. Due to the fact that Mr403Forbidden Ransomware does not encrypt files, you can remove it without hesitation as you will not have to get a decryption tool. You can delete this program manually using the guide below or get SpyHunter, an anti-malware program that will remove this ransomware from your computer without any difficulty. You should also invest in an anti-malware program to prevent functional ransomware that can encrypt your files from infecting your PC.

Removal Guide

  1. Simultaneously press Windows+E keys.
  2. Type the following file paths in the address box and press Enter.
  3. %TEMP%
  4. %USERPROFILE\Downloads
  5. %USERPROFILE\Desktop
  6. Find the randomly-named executable.
  7. Right-click it and click Delete.

In non-techie terms:

Mr403Forbidden Ransomware was supposed to be a program that encrypts your files but, thankfully, it does not work. Therefore, it cannot encrypt your files. Nevertheless, if your PC becomes infected with it, then it will render a dialog window that demands that you pay a ransom. You can simply remove this ransomware without paying the ransom using one of our suggested methods outlined above.