<https://forums.malwarebytes.com/topic/143705-adwareinstallbrain-vs-pupinstallbrain/#comment-800386>
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"Hi Phil0001   Yes the difference is back in July we widened our criteria for PUP listing. http://blog.malwarebytes.org/news/2013/07/malwarebytes-adopts-aggressive-pup-policy/     Adware type softwares with a EULA we once detected as Adware that pre date that change.   Where as new detections have the PUP.Optional vendor name if a EULA came with the software.   To be honest a lot of sites will overplay or mislead in their description of what something is or does to further their own needs etc   If InstallBrain was malicious then we would detect it as such but it is not malicious or perform any illegal activity which would allow us to detect it as malware.   I hope this puts your mind at rest. "
<https://forums.malwarebytes.com/topic/143705-adwareinstallbrain-vs-pupinstallbrain/>