.MAAS File Extension
STOP MAAS Ransomware Encrypted File
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What is a MAAS file?
A MAAS file is a file that has been renamed and encrypted by STOP MAAS ransomware, which is malware distributed by cybercriminals. It contains a normal file, such as a document, image, song, or video, that the ransomware is holding hostage. MAAS files cannot be decrypted.
In July 2020, some PC users began reporting their computers had been infected by a new variant of STOP ransomware. This variant encrypts users' files and appends them with the .maas extension.
The ransomware then produces a plain text ransom note named _readme.txt in every folder that contains an infected file. The note contains instructions users are supposed to follow to decrypt their files. (FileInfo recommends you never pay a ransom to decrypt your files.)
How did my computer get infected by STOP MAAS ransomware?
STOP MAAS ransomware is most commonly distributed within "free programs" that are actually adware and malware bundles. If you recently downloaded and installed a "free program" (especially one that is meant to be a copy of a paid program) from a software download website, that may be how your computer became infected by STOP MAAS ransomware.
NOTE: To learn more about STOP ransomware, refer to the .STOP entry.
How do I open a MAAS file?
Because MAAS files are encrypted, you cannot open them. Additionally, because MAAS files are encrypted using an online private key, there is no way to decrypt them.
If your computer has been infected by STOP MAAS ransomware, the best option to restore your files to their original state is likely to perform a System Restore. Note that performing a System Restore will cause you to lose any data created in the interval between now and your last restore point. So, you may want to back up any data and files created since your last restore point.