Osiris and the file OSIRIS-9b28.html are both linked to a ransomware. A ransomware is a program that crypts all personal files found in a computer, asking the user for a ransom in order to get them back. We could say this is the modern take on hostages situations, many users have already been affected all around the world.
If you are one of its victims there are few actions you can take against it. First of all you must quickly remove Osiris, in an attempt to minimize possible damage. A good anti-malware like Malwarebytes or an antivirus like Eset will take care of this. Now, recovering your files is a whole different story. If you pay the ransom there’s no guarantee that the pirate will actually give you the necessary key to decrypt your files. Without this key your chances of getting back your files are very low. You could try to recover them by means of Windows’ automatic backups, however ransomware programs like Osiris usually make sure to delete all those files. Another possible path is to get the key by force with a specialized tool, however there’s no guarantee that this will work. It might be even difficult to find a tool made for Osiris, and if there is one it might not be ready for several weeks or even months.
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